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-rw-r--r--asmmon.c138
-rw-r--r--asmmon.h109
-rw-r--r--assemble.c85
-rw-r--r--lexer.c408
-rw-r--r--lexer.h21
-rw-r--r--programs/subasm.s50
-rw-r--r--programs/subeditor.s431
-rw-r--r--programs/utils.s46
-rw-r--r--sux.c25
9 files changed, 635 insertions, 678 deletions
diff --git a/asmmon.c b/asmmon.c
index f9fbd7a..585d443 100644
--- a/asmmon.c
+++ b/asmmon.c
@@ -16,9 +16,8 @@ char *comment[MAX_TOK];
uint16_t incl[MAX_TOK];
line *lines;
line *last_line;
-struct line tln[MAX_TOK];
-struct symbol *symbols[MAX_TOK];
-struct fixup *fixups[MAX_TOK];
+symbol *symbols = 0;
+fixup *fixups = 0;
static char tstr[2048];
@@ -112,8 +111,8 @@ char *showbits(uint64_t value, uint8_t bitnum, uint8_t dbg) {
}
void list(uint16_t start, uint16_t end, uint8_t all, uint8_t ln, uint8_t addr, uint8_t dbg) {
- line *s = find_line(start, dbg);
- line *e = find_line(end, dbg);
+ line *s = (!all) ? find_line(start, dbg) : lines ;
+ line *e = (!all) ? find_line( end, dbg) : last_line;
uint8_t j = 0;
uint8_t flags = 0;
uint8_t isstr;
@@ -127,22 +126,18 @@ void list(uint16_t start, uint16_t end, uint8_t all, uint8_t ln, uint8_t addr, u
char mne_lower[4];
char ch[6];
- if (all) {
- s = lines;
- e = last_line;
- }
-
do {
- token *t = s->tok;
+ token *tok = s->tok;
+ token *t;
uint8_t am = 0xFF;
uint8_t rs = 0xFF;
if (dbg) {
printf("list(): ");
}
if (ln) {
- printf("%u\t", s->linenum);
+ printf("%u\t\t", s->linenum);
} else if (addr) {
- printf("$%"PRIX64":\t", s->addr);
+ printf("$%"PRIX64":\t\t", s->addr);
}
spaces = s->sspace;
tabs = s->stab;
@@ -156,10 +151,10 @@ void list(uint16_t start, uint16_t end, uint8_t all, uint8_t ln, uint8_t addr, u
tabs--;
}
}
- for (; t && t->id != TOK_COMMENT; t = t->next) {
+ for (; tok && tok->id != TOK_COMMENT && tok >= t; tok = tok->next) {
+ t = tok;
switch (t->id) {
- case TOK_DIR : printf(".%s ", dir_t[t->type]); break;
- case TOK_STRING: printf("\"%s\"", t->str) ; break;
+ case TOK_DIR : printf(".%s ", dir_t[t->type] ); break;
case TOK_OPCODE:
for (; j < 3; j++) {
mne_lower[j] = tolower(mne[t->byte][j]);
@@ -169,10 +164,11 @@ void list(uint16_t start, uint16_t end, uint8_t all, uint8_t ln, uint8_t addr, u
printf("%s", mne_lower);
am = t->type;
t = t->next;
- if (t->id == TOK_RS) {
+ if (t && t->id == TOK_RS) {
rs = t->type;
printf("%s", rs_t[t->type]);
}
+ putchar(' ');
switch (am) {
case IMM : putchar('#'); break;
case IND :
@@ -182,45 +178,65 @@ void list(uint16_t start, uint16_t end, uint8_t all, uint8_t ln, uint8_t addr, u
break;
case TOK_SYM:
case TOK_LABEL:
- printf("%s", symbols[t->word]->name);
+ if (t->type == 1) {
+ putchar('@');
+ }
+ printf("%s", (t->sym) ? t->sym->name : "unknown");
if (t->id == TOK_LABEL) {
putchar(':');
} else if (t == s->tok && t->id == TOK_SYM) {
printf(" = ");
}
break;
- case TOK_HEX: printf("$%"PRIX64, t->qword); break;
- case TOK_DEC: printf( "%"PRIu64, t->qword); break;
- case TOK_BIN:
- if (rs != 0xFF) {
- bitnum = (rs << 3);
- } else {
- opsize += (t->qword <= 0x000000FF) + 0;
- opsize += (t->qword > 0x000000FF) + 1;
- opsize += (t->qword > 0x0000FFFF) + 2;
- opsize += (t->qword > 0xFFFFFFFF) + 3;
- if (opsize) {
- bitnum = bitsize[opsize-1];
+ case TOK_HEX:
+ if (t->id == TOK_HEX) {
+ printf("$%02"PRIX64, t->qword);
+ } else if (t->id == TOK_DEC) {
+ case TOK_DEC: printf( "%"PRIu64, t->qword);
+ } else if (t->id == TOK_BIN) {
+ case TOK_BIN: if (rs != 0xFF) {
+ bitnum = (rs << 3);
+ } else {
+ opsize += (t->qword <= 0x000000FF) + 0;
+ opsize += (t->qword > 0x000000FF) + 1;
+ opsize += (t->qword > 0x0000FFFF) + 2;
+ opsize += (t->qword > 0xFFFFFFFF) + 3;
+ if (opsize) {
+ bitnum = bitsize[opsize-1];
+ }
}
+ printf("%%%s", showbits(t->qword, bitnum, dbg));
+ bitnum = 0;
+ opsize = 0;
+ } else if (t->id == TOK_STRING) {
+ case TOK_STRING:
+ printf("\"%s\"", (t->str) ? t->str : "");
+ } else if (t->id == TOK_CHAR) {
+ case TOK_CHAR: j = 0;
+ switch (t->byte) {
+ default : ch[j++] = t->byte; break;
+ case '\n': ch[j++] = '\\'; ch[j++] = 'n' ; break;
+ case '\r': ch[j++] = '\\'; ch[j++] = 'r' ; break;
+ case '\b': ch[j++] = '\\'; ch[j++] = 'b' ; break;
+ case '\\': ch[j++] = '\\'; ch[j++] = '\\'; break;
+ case '\'': ch[j++] = '\\'; ch[j++] = '\''; break;
+ case '\"': ch[j++] = '\\'; ch[j++] = '\"'; break;
+ }
+ ch[j] = '\0';
+ j = 0;
+ printf("\'%s\'", ch);
}
- printf("%%%s", showbits(t->qword, bitnum, dbg));
- bitnum = 0;
- opsize = 0;
- break;
- case TOK_CHAR:
- j = 0;
- switch (t->byte) {
- default : ch[j++] = t->byte; break;
- case '\n': ch[j++] = '\\'; ch[j++] = 'n' ; break;
- case '\r': ch[j++] = '\\'; ch[j++] = 'r' ; break;
- case '\b': ch[j++] = '\\'; ch[j++] = 'b' ; break;
- case '\\': ch[j++] = '\\'; ch[j++] = '\\'; break;
- case '\'': ch[j++] = '\\'; ch[j++] = '\''; break;
- case '\"': ch[j++] = '\\'; ch[j++] = '\"'; break;
+ if (t->next) {
+ switch (t->next->id) {
+ case TOK_STRING:
+ case TOK_HEX:
+ case TOK_BIN:
+ case TOK_DEC:
+ case TOK_CHAR:
+ printf(", ");
+ break;
+ }
}
- ch[j] = '\0';
- j = 0;
- printf("\'%s\'", ch);
break;
case TOK_EXPR:
switch (t->type) {
@@ -269,8 +285,8 @@ void list(uint16_t start, uint16_t end, uint8_t all, uint8_t ln, uint8_t addr, u
tabs--;
}
}
- if (t->id == TOK_COMMENT) {
- printf(";%s", t->str);
+ if (tok && tok->id == TOK_COMMENT) {
+ printf(";%s", (tok->str) ? tok->str : "");
}
puts("");
s = s->next;
@@ -308,7 +324,6 @@ int asmmon(const char *fn) {
uint8_t dbg = 0;
uint8_t isinclude = 0;
uint16_t tmp_lineidx = 0;
- init_symbol();
while (!done) {
char *cmd;
char *arg = malloc(sizeof(char *)*128);
@@ -358,9 +373,7 @@ int asmmon(const char *fn) {
if (fp2 != NULL) {
fclose(fp2);
}
- if (lines) {
- free_lines();
- }
+ cleanup();
return 2;
case 0x02:
viewmem(address);
@@ -428,15 +441,16 @@ int asmmon(const char *fn) {
}
break;
case 0x08:
- if (!inc_file) {
+ if (!inc_count) {
printf("Assembling %s\n", (strcasecmp(fn, "stdin")) ? fn : "typed in program.");
+ }
+ if (!inc_file) {
+ puts("Now assembling.");
+ bc.progsize = 0;
+ bc.datasize = 0;
assemble(lines, &bc, dbg);
progsize = bc.progsize;
datasize = bc.datasize;
- printf("Finished assembling %s\n", (strcasecmp(fn, "stdin")) ? fn : "typed in program.");
- printf("%"PRIu64"/$%"PRIX64" bytes of program code.\n", progsize, progsize);
- printf("%"PRIu64"/$%"PRIX64" bytes of data.\n", datasize, datasize);
- putchar('\n');
}
isinclude = (inc_file != 0);
if (inc_file) {
@@ -445,7 +459,6 @@ int asmmon(const char *fn) {
sprintf(fn2, "%s/%s", path, string[incl[inc_count]]);
isinclude = (inc_file != 0);
inc_file--;
- inc_count++;
if (inc_file && fp2 != NULL) {
fclose(fp2);
}
@@ -453,8 +466,11 @@ int asmmon(const char *fn) {
if (fp2 == NULL) {
free(path);
fclose(fp);
+ cleanup();
return 2;
}
+ printf("Including %s\n", string[incl[inc_count++]]);
+ inc_count++;
}
if (!isinclude) {
puts("Finished assembling.");
@@ -517,8 +533,6 @@ int asmmon(const char *fn) {
if (fp2 != NULL) {
fclose(fp2);
}
- if (lines) {
- free_lines();
- }
+ cleanup();
return 0;
}
diff --git a/asmmon.h b/asmmon.h
index 53fdea2..213c9b5 100644
--- a/asmmon.h
+++ b/asmmon.h
@@ -4,37 +4,19 @@
#define MAX_TOK 0x1000
-struct line {
- uint8_t stab;
- uint8_t sspace;
- uint8_t dir;
- uint8_t mne;
- uint8_t rs;
- uint8_t opbase;
- uint8_t aopbase;
- uint8_t am;
- uint8_t cm;
- uint8_t etab;
- uint8_t espace;
- uint8_t islabel;
- uint8_t issym;
- uint16_t sym;
- uint16_t com;
- uint16_t str;
- uint16_t incl;
- uint16_t linenum;
- uint64_t op;
- uint64_t aop;
- uint64_t addr;
-};
+typedef struct tok token ;
+typedef struct ln line ;
+typedef struct sym symbol;
+typedef struct fix fixup ;
struct tok {
- struct tok *next; /* Pointer to the next token. */
- uint8_t id; /* Token ID. */
- uint8_t type; /* Token type ID. */
+ token *next; /* Pointer to the next token. */
+ uint8_t id; /* Token ID. */
+ uint8_t type; /* Token type ID. */
/* Token value(s). */
union {
+ symbol *sym;
char *str;
uint8_t byte ;
uint16_t word ;
@@ -44,8 +26,8 @@ struct tok {
};
struct ln {
- struct ln *next; /* Pointer to the next line. */
- struct tok *tok; /* The token(s) for this line. */
+ line *next; /* Pointer to the next line. */
+ token *tok; /* The token(s) for this line. */
uint16_t count; /* Total tokens for this line. */
uint32_t linenum; /* Line number. */
uint64_t addr; /* The address of this line. */
@@ -55,20 +37,22 @@ struct ln {
uint8_t espace; /* Number of ending spaces. */
};
-typedef struct tok token;
-typedef struct ln line;
-struct fixup {
- struct symbol *s;
+struct fix {
+ fixup *next;
+ symbol *s;
token *t;
uint64_t adr;
};
-struct symbol {
+struct sym {
+ symbol *next;
+ symbol *local;
+ uint16_t count;
uint64_t val;
uint8_t def;
- char name[128];
+ char *name;
uint16_t id;
};
@@ -80,10 +64,9 @@ extern line *lines;
extern line *last_line;
extern token *tokens;
extern token *last_tok;
-extern struct line tokline[];
-extern struct line tln[];
-extern struct symbol *symbols[];
-extern struct fixup *fixups[];
+extern symbol *symbols;
+extern symbol *locals;
+extern fixup *fixups;
extern uint8_t lex_type;
@@ -98,6 +81,7 @@ enum dir {
enum token {
TOK_DIR,
+ TOK_LOCAL,
TOK_LABEL,
TOK_SYM,
TOK_EXPR,
@@ -117,6 +101,7 @@ enum token {
enum pre_token {
PTOK_DOT,
+ PTOK_AT,
PTOK_COLON,
PTOK_EQU,
PTOK_PLUS,
@@ -255,23 +240,24 @@ static const char *rs_t[4] = {
[3] = ".q"
};
-static const char *lex_tok[16] = {
- [0x0] = "TOK_DIR",
- [0x1] = "TOK_LABEL",
- [0x2] = "TOK_SYM",
- [0x3] = "TOK_EXPR",
- [0x4] = "TOK_CSV",
- [0x5] = "TOK_STRING",
- [0x6] = "TOK_CHAR",
- [0x7] = "TOK_IND",
- [0x8] = "TOK_IMM",
- [0x9] = "TOK_OPCODE",
- [0xA] = "TOK_RS",
- [0xB] = "TOK_COMMENT",
- [0xC] = "TOK_HEX",
- [0xD] = "TOK_DEC",
- [0xE] = "TOK_BIN",
- [0xF] = "TOK_INCLUDE"
+static const char *lex_tok[17] = {
+ [0x00] = "TOK_DIR",
+ [0x01] = "TOK_LOCAL",
+ [0x02] = "TOK_LABEL",
+ [0x03] = "TOK_SYM",
+ [0x04] = "TOK_EXPR",
+ [0x05] = "TOK_CSV",
+ [0x06] = "TOK_STRING",
+ [0x07] = "TOK_CHAR",
+ [0x08] = "TOK_IND",
+ [0x09] = "TOK_IMM",
+ [0x0A] = "TOK_OPCODE",
+ [0x0B] = "TOK_RS",
+ [0x0C] = "TOK_COMMENT",
+ [0x0D] = "TOK_HEX",
+ [0x0E] = "TOK_DEC",
+ [0x0F] = "TOK_BIN",
+ [0x10] = "TOK_INCLUDE"
};
static const char *adrmode[9] = {
@@ -504,19 +490,10 @@ typedef struct bc bytecount;
extern uint8_t defined;
extern uint8_t isfixup;
-extern void init_symbol();
-extern uint16_t mksymbol(const char *name, uint64_t val, uint8_t def, uint8_t useid, uint16_t id, uint8_t dbg);
-extern uint64_t use_symbol(const char *name, uint16_t id, uint64_t val, uint8_t useid, uint8_t dbg);
-extern uint8_t set_symval(const char *name, uint16_t id, uint64_t val, uint8_t useid, uint8_t dbg);
-extern char *get_symname(uint16_t id, uint8_t dbg);
-extern uint16_t get_symid(const char *name, uint64_t val, token *t, uint8_t dbg);
-extern uint16_t get_comment(const char *cmnt, uint8_t dbg);
-extern uint16_t reslv_fixups(uint8_t dbg);
extern line *find_line(uint32_t ln, uint8_t dbg);
extern uint64_t lex(char *str, uint64_t address, uint8_t dbg);
extern uint64_t parse_tokens(token *tm, bytecount *bc, uint8_t isasm, uint64_t address, uint8_t dbg);
-extern token *make_token(uint8_t id, uint8_t type, uint64_t value, char *str);
+extern token *make_token(uint8_t id, uint8_t type, uint64_t value, char *str, symbol *sym);
extern void assemble(line *ln, bytecount *bc, uint8_t dbg);
-extern void free_tokens(token *t, uint16_t count);
-extern void free_lines();
+extern void cleanup();
diff --git a/assemble.c b/assemble.c
index bfa516f..651f5ee 100644
--- a/assemble.c
+++ b/assemble.c
@@ -42,7 +42,7 @@ uint64_t get_val(token *t, uint64_t addr, uint8_t size, uint8_t dbg) {
break;
case TOK_SYM:
case TOK_LABEL:
- tmp_val = use_symbol("", t->word, addr, 1, dbg);
+ tmp_val = (t->sym) ? t->sym->val : addr;
t = t->next;
break;
}
@@ -201,7 +201,7 @@ uint64_t handle_opcode(token *t, bytecount *bc, uint8_t isasm, uint64_t address,
val.u64 = get_val(t, address, (rs != 0xFF) ? rs : 0, dbg);
}
opcode = opcodes[inst][type];
- if (inst == 80) {
+ if (inst == 78) {
if (type == IMM) {
rs = 1;
} else {
@@ -333,15 +333,17 @@ uint64_t parse_tokens(token *t, bytecount *bc, uint8_t isasm, uint64_t address,
return address;
}
-token *make_token(uint8_t id, uint8_t type, uint64_t value, char *str) {
+token *make_token(uint8_t id, uint8_t type, uint64_t value, char *str, symbol *s) {
token *new_tok = malloc(sizeof(token));
(last_tok) ? (last_tok->next = new_tok) : (tokens = new_tok);
new_tok->id = id;
new_tok->type = type;
- if (!str[0]) {
- new_tok->qword = value;
- } else {
+ if (s) {
+ new_tok->sym = s;
+ } else if (str[0]) {
new_tok->str = str;
+ } else {
+ new_tok->qword = value;
}
new_tok->next = NULL;
last_tok = new_tok;
@@ -355,27 +357,78 @@ void assemble(line *ln, bytecount *bc, uint8_t dbg) {
}
}
-void free_tokens(token *t, uint16_t count) {
+static inline void free_tokens(token *t, uint16_t count) {
token *tok;
- while (t != NULL) {
- if (count--) {
- break;
- }
+ for (; t != NULL && t >= tok; t = t->next) {
tok = t;
free(tok);
- t = t->next;
}
}
void free_lines() {
line *l = lines;
line *ln;
- for (; l != NULL; l = l->next) {
- if (l < ln) {
- break;
- }
+ for (; l != NULL && l >= ln; l = l->next) {
free_tokens(l->tok, l->count);
ln = l;
free(ln);
}
}
+
+void free_locals(symbol *s) {
+ symbol *sym;
+ for (; s != NULL && s >= sym; s = s->next) {
+ sym = s;
+ if (sym->name != NULL) {
+ free(sym->name);
+ }
+ free(sym);
+ }
+}
+
+void free_symbols() {
+ symbol *s = symbols;
+ symbol *sym = symbols;
+ for (; s != NULL && s >= sym; s = s->next) {
+ if (s->local) {
+ free_locals(s->local);
+ }
+ sym = s;
+ if (sym->name != NULL) {
+ free(sym->name);
+ }
+ free(sym);
+ }
+}
+
+static inline void free_fixups() {
+ fixup *f = fixups;
+ fixup *fix;
+ for (; f != NULL && f >= fix; f = f->next) {
+ /*free_tokens(l->tok, l->count);*/
+ fix = f;
+ free(fix);
+ }
+}
+
+void cleanup() {
+ uint16_t i;
+ if (lines) {
+ free_lines();
+ }
+ if (symbols) {
+ free_symbols();
+ }
+ if (fixups) {
+ free_fixups();
+ }
+ while (i < stridx || i < comidx) {
+ if (i < stridx) {
+ free(string[i]);
+ }
+ if (i < comidx) {
+ free(comment[i]);
+ }
+ i++;
+ }
+}
diff --git a/lexer.c b/lexer.c
index 9610297..47109ca 100644
--- a/lexer.c
+++ b/lexer.c
@@ -5,31 +5,21 @@ uint8_t lex_type;
uint16_t sym_count = 0;
token *tokens = NULL;
token *last_tok = NULL;
+symbol *locals = NULL;
+symbol *cur_sym = NULL;
-void init_symbol() {
- uint16_t i = 0;
- for (; i < 0x1000; i++) {
- symbols[i] = 0;
- fixups[i] = 0;
- }
-}
-
-uint16_t mksymbol(const char *name, uint64_t val, uint8_t def, uint8_t useid, uint16_t id, uint8_t dbg) {
+symbol *mksymbol(const char *name, uint64_t val, uint8_t def, uint8_t islocal, uint8_t useid, uint16_t id, uint8_t dbg) {
uint16_t i = 0;
+ symbol *s = (!islocal || islocal == 2) ? symbols : locals;
uint8_t flag = 0;
- for (; i < sym_count; i++) {
- if (useid) {
- flag = (id == symbols[i]->id);
- } else {
- if (name[0] == symbols[i]->name[0]) {
- flag = !strcmp(name, symbols[i]->name);
- } else {
- continue;
- }
+ for (; s; s = s->next, i++) {
+ if (!useid && name[0] != s->name[0]) {
+ continue;
}
+ flag = (useid) ? (id == s->id) : !strcmp(name, s->name);
if (flag) {
if (def) {
- if (symbols[i]->def) {
+ if (s->def) {
if (dbg) {
printf("mksymbol(): oof, you cannot redefine the symbol: %s\n", name);
}
@@ -37,126 +27,92 @@ uint16_t mksymbol(const char *name, uint64_t val, uint8_t def, uint8_t useid, ui
} else {
defined = 0;
}
- symbols[i]->def = def;
- symbols[i]->val = val;
- symbols[i]->id = i;
+ s->def = def;
+ s->val = val;
+ s->id = i;
if (dbg) {
printf("mksymbol(): def: %u, val: $%016"PRIX64", name: %s\n", def, val, name);
- printf("mksymbol(): i: $%X, id: $%04X\n", i, symbols[i]->id);
+ printf("mksymbol(): i: $%X, id: $%04X\n", i, s->id);
}
}
- return symbols[i]->id;
+ return s;
}
}
- symbols[i] = malloc(sizeof(**symbols) + strlen(name));
- symbols[i]->def = def;
- symbols[i]->val = val;
- strcpy(symbols[i]->name, name);
- symbols[i]->id = sym_count++;
+ size_t str_size = strlen(name)+1;
+ s = malloc(sizeof(*s));
+ s->name = malloc(str_size);
+ s->def = def;
+ s->val = val;
+ s->count = 0;
+ memcpy(s->name, name, str_size);
+ s->next = (!islocal) ? symbols : locals;
+ s->id = sym_count++;
+ if (!islocal) {
+ s->local = NULL;
+ symbols = s;
+ } else {
+ cur_sym->count++;
+ locals = s;
+ }
defined = 0;
if (dbg) {
printf("mksymbol(): def: %u, val: $%016"PRIX64", name: %s, id: $%04X\n", def, val, name, sym_count-1);
}
- return sym_count-1;
+ return s;
}
-uint64_t use_symbol(const char *name, uint16_t id, uint64_t val, uint8_t useid, uint8_t dbg) {
- uint16_t i;
- i = mksymbol(name, 0, 0, useid, id, dbg);
- uint8_t is_defined = (i != 0xFFFF);
- val++;
+uint16_t fixup_cnt = 0;
+symbol *get_sym(const char *name, uint64_t val, token *t, uint8_t islocal, uint8_t dbg) {
+ symbol *s = mksymbol(name, 0, 0, islocal, 0, 0, dbg);
if (dbg) {
- puts("use_symbol(): We also got here.");
- printf("use_symbol(): i: $%X\n", i);
+ printf("get_sym(): Symbol ID: $%X.\n", s->id);
}
- if (symbols[i] != NULL) {
- if (symbols[i]->def) {
- return symbols[i]->val;
- } else {
- if (dbg) {
- printf("use_symbol(): ");
- printf("oof, symbol ");
- if (useid) {
- printf("id $%04X, ", id);
- } else {
- printf("%s, ", name);
- }
- puts("does not exist, yet.");
- }
- return val-1;
+ if (s->def) {
+ return s;
+ } else {
+ if (dbg) {
+ printf("get_sym(): oof, symbol %s, does not exist, yet.\n", name);
}
+ fixup *f = malloc(sizeof(*f));
+ f->next = fixups;
+ f->adr = val;
+ f->t = t;
+ f->s = s;
+ fixups = f;
+ fixup_cnt++;
+ return NULL;
}
- return val-1;
}
-uint8_t set_symval(const char *name, uint16_t id, uint64_t val, uint8_t useid, uint8_t dbg) {
- uint16_t i = mksymbol(name, 0, 0, useid, id, dbg);
- if (symbols[i] != NULL) {
- if (symbols[i]->def) {
- symbols[i]->val = val;
- return 1;
+uint16_t reslv_fixups(uint8_t dbg) {
+ fixup *f = fixups;
+ symbol *ls;
+ uint16_t i = 0, j = 0;
+ for (; f; f = f->next) {
+ if (f->s->def) {
+ if (dbg) {
+ printf("reslv_fixups(): Symbol ID: $%X, Symbol Name: %s, Symbol Value: $%"PRIX64".\n", f->s->id, f->s->name, f->s->val);
+ }
+ f->t->sym = f->s;
} else {
if (dbg) {
- printf("set_symval(): ");
- printf("oof, symbol ");
- if (useid) {
- printf("id $%04X, ", id);
- } else {
- printf("%s, ", name);
- }
- puts("does not exist, yet.");
+ printf("reslv_fixups(): oof, undefined reference to '%s', at $%016"PRIX64".\n", f->s->name, f->adr);
}
- return 0;
- }
- }
- return 0;
-}
-
-char *get_symname(uint16_t id, uint8_t dbg) {
- if (symbols[id]->def) {
- return symbols[id]->name;
- } else {
- if (dbg) {
- printf("get_symname(): oof, symbol id $%04X, has not been defined, yet.\n", id);
+ i++;
}
- return NULL;
}
-}
+ return i;
-uint16_t fixup_cnt = 0;
-uint16_t get_symid(const char *name, uint64_t val, token *t, uint8_t dbg) {
- uint16_t i = mksymbol(name, 0, 0, 0, 0, dbg);
- if (dbg) {
- printf("get_symid(): Symbol ID: $%X, i: $%X.\n", symbols[i]->id, i);
- }
- if (symbols[i]->def) {
- return symbols[i]->id;
- } else {
- if (dbg) {
- printf("get_symid(): oof, symbol %s, does not exist, yet.\n", name);
- }
- fixups[fixup_cnt] = malloc(sizeof(**fixups));
- fixups[fixup_cnt]->adr = val;
- fixups[fixup_cnt]->t = t;
- fixups[fixup_cnt]->s = symbols[i];
- fixup_cnt++;
- return 0xFFFF;
- }
}
uint16_t get_comment(const char *com, uint8_t dbg) {
uint16_t i = 0;
uint8_t iscom = 0;
for (; i < comidx; i++) {
- if (comment[i] != NULL) {
- if (com[0] == comment[i][0]) {
- iscom = !strcmp(com, comment[i]);
- }
- } else {
- break;
- }
- if (iscom) {
+ if (comment[i] == NULL || iscom) {
break;
+ } else if (com[0] == comment[i][0]) {
+ iscom = !strcmp(com, comment[i]);
}
}
if (comment[i] == NULL || i == comidx) {
@@ -178,10 +134,8 @@ uint16_t get_string(const char *str, uint8_t dbg) {
for (; i < stridx; i++) {
if (isstr || string[i] == NULL) {
break;
- } else {
- if (str[0] == string[i][0]) {
- isstr = !strcmp(str, string[i]);
- }
+ } else if (str[0] == string[i][0]) {
+ isstr = !strcmp(str, string[i]);
}
}
if (string[i] == NULL || i == stridx) {
@@ -197,35 +151,10 @@ uint16_t get_string(const char *str, uint8_t dbg) {
return i;
}
-uint16_t reslv_fixups(uint8_t dbg) {
- uint16_t i = 0, j = 0;
- for (; fixups[j]; j++) {
- if (fixups[j]->s->def) {
- if (dbg) {
- printf("reslv_fixups(): Symbol ID: $%X, Symbol Name: %s, Symbol Value: $%"PRIX64".\n", fixups[j]->s->id, fixups[j]->s->name, fixups[j]->s->val);
- }
- fixups[j]->t->word = fixups[j]->s->id;
- } else {
- if (dbg) {
- printf("reslv_fixups(): oof, undefined reference to '%s', at $%016"PRIX64".\n", fixups[j]->s->name, fixups[j]->adr);
- }
- i++;
- }
- }
- return i;
-
-}
-
line *find_line(uint32_t ln, uint8_t dbg) {
uint32_t i = 0;
line *l = lines;
for (; l && l->linenum != ln; l = l->next);
- /*if (dbg) {
- if (l->linenum == ln) {
- printf("find_line(): Found line number %u, at line index %X.\n", ln, i);
- }
- printf("find_line(): linenum: %u, i: %X\n", l->linenum, i);
- }*/
if (l != NULL) {
if (l->linenum == ln) {
if (dbg) {
@@ -257,6 +186,8 @@ uint64_t lex(char *str, uint64_t address, uint8_t dbg) {
uint8_t rs = 0;
uint8_t base = 0;
+ uint8_t islocal = 0;
+
uint8_t isop = 0;
int num = 0;
int isch = 0;
@@ -346,7 +277,7 @@ uint64_t lex(char *str, uint64_t address, uint8_t dbg) {
}
}
l->count++;
- t = make_token(lex_type, k, 0, "");
+ t = make_token(lex_type, k, 0, "", NULL);
} else {
lex_type = TOK_RS;
switch (tolower(lexeme[j-1])) {
@@ -364,7 +295,7 @@ uint64_t lex(char *str, uint64_t address, uint8_t dbg) {
break;
}
l->count++;
- t = make_token(lex_type, rs, 0, "");
+ t = make_token(lex_type, rs, 0, "", NULL);
isop = 0;
}
break;
@@ -391,7 +322,7 @@ uint64_t lex(char *str, uint64_t address, uint8_t dbg) {
}
lex_type = TOK_STRING;
l->count++;
- t = make_token(lex_type, 0, 0, string[strid]);
+ t = make_token(lex_type, 0, 0, string[strid], NULL);
break;
case PTOK_DOLLAR:
case PTOK_PERCENT:
@@ -408,17 +339,22 @@ uint64_t lex(char *str, uint64_t address, uint8_t dbg) {
i += j;
value = strtoull(lexeme, NULL, base);
if (lt->id == TOK_SYM) {
- mksymbol(sym, value, 1, 0, 0, dbg);
+ mksymbol(sym, value, 1, islocal, 0, 0, dbg);
if (lt) {
- lt->word = get_symid(sym, address, lt, dbg);
+ lt->sym = get_sym(sym, address, lt, islocal, dbg);
+ }
+ if (!islocal) {
+ cur_sym = symbols;
+ locals = cur_sym->local;
}
- isfixup += (lt->word == 0xFFFF);
+ islocal = 0;
+ isfixup += (lt->sym == NULL);
if (dbg) {
printf("lex(): isfixup: %u\n", isfixup);
}
}
l->count++;
- t = make_token(lex_type, 0, value, "");
+ t = make_token(lex_type, 0, value, "", NULL);
break;
case PTOK_SQUOTE:
i++;
@@ -444,10 +380,15 @@ uint64_t lex(char *str, uint64_t address, uint8_t dbg) {
}
lex_type = TOK_CHAR;
l->count++;
- t = make_token(lex_type, 0, ch, "");
+ t = make_token(lex_type, 0, ch, "", NULL);
+ break;
+ case PTOK_LBRACK:
+ case PTOK_HASH :
+ l->tok->type = (ptok == PTOK_LBRACK) ? IND : IMM;
+ lex_type = (ptok == PTOK_LBRACK) ? TOK_IND : TOK_IMM;
+ memset(lexeme, 0, strlen(lexeme)+1);
+ lexeme[j++] = str[i];
break;
- case PTOK_LBRACK: l->tok->type = IND; memset(lexeme, 0, strlen(lexeme)+1); lexeme[j++] = str[i]; break;
- case PTOK_HASH : l->tok->type = IMM; memset(lexeme, 0, strlen(lexeme)+1); lexeme[j++] = str[i]; break;
case PTOK_PLUS:
case PTOK_MINUS:
case PTOK_GT:
@@ -460,15 +401,13 @@ uint64_t lex(char *str, uint64_t address, uint8_t dbg) {
case PTOK_LT : value = EXPR_HIGH ; break;
}
l->count++;
- t = make_token(lex_type, value, 0, "");
+ t = make_token(lex_type, value, 0, "", NULL);
memset(lexeme, 0, strlen(lexeme)+1);
lexeme[j++] = str[i];
break;
case PTOK_EQU:
i++;
lex_type = TOK_SYM;
- l->count++;
- t = make_token(lex_type, 0, 0, "");
memset(lexeme, 0, strlen(lexeme)+1);
lexeme[j] = str[i];
break;
@@ -490,28 +429,43 @@ uint64_t lex(char *str, uint64_t address, uint8_t dbg) {
break;
case PTOK_X:
case PTOK_Y:
+ lexeme[j] = str[i++];
+ lexeme[j+1] = '\0';
+ lexeme[j+2] = '\0';
+ if (lex_type != TOK_IND && lex_type != TOK_CSV) {
+ break;
+ }
switch (ptok) {
case PTOK_X: l->tok->type = (lex_type == TOK_IND) ? INDX : ZMX; break;
case PTOK_Y: l->tok->type = (lex_type == TOK_IND) ? INDY : ZMY; break;
}
- lexeme[j] = str[i];
- lexeme[j+1] = '\0';
- lexeme[j+2] = '\0';
- i++;
+ break;
+ case PTOK_AT:
+ memset(lexeme, 0, strlen(lexeme)+1);
+ lexeme[j] = '@';
+ islocal = 1;
+ lex_type = TOK_LOCAL;
break;
case PTOK_COLON:
i++;
lexeme[j] = ':';
lexeme[j+1] = '\0';
lex_type = TOK_LABEL;
- l->count++;
- t = make_token(lex_type, 0, 0, "");
- mksymbol(sym, address, 1, 0, 0, dbg);
+ mksymbol(sym, address, 1, islocal, 0, 0, dbg);
if (isfixup) {
isfixup = reslv_fixups(dbg);
}
- t->word = get_symid(sym, address, t, dbg);
- isfixup += (t->word == 0xFFFF);
+ if (lt) {
+ lt->id = lex_type;
+ lt->type = islocal;
+ lt->sym = get_sym(sym, address, t, islocal, dbg);
+ isfixup += (lt->sym == NULL);
+ }
+ if (!islocal) {
+ cur_sym = symbols;
+ locals = cur_sym->local;
+ }
+ islocal = 0;
if (dbg) {
printf("lex(): isfixup: %u\n", isfixup);
}
@@ -519,54 +473,43 @@ uint64_t lex(char *str, uint64_t address, uint8_t dbg) {
case PTOK_SCOLON:
i++;
for (; isdelm(str[i+j], dbg) != 1; j++);
- memcpy(lexeme, str+i, j);
- lexeme[j] = '\0';
- i += j;
- comid = get_comment(lexeme, dbg);
- if (comid == 0xFFFF) {
- /*if (line != lineidx && l[line].com != 0xFFFF) {
- comid = l[line].com;
- } else {
- comid = comidx;
- }*/
- comid = comidx;
- comment[comid] = malloc(j+1);
- memcpy(comment[comid], lexeme, j+1);
- comidx++;
+ if (!j) {
+ lexeme[j] = ' ';
+ lexeme[j+1] = '\0';
+
} else {
- }
- if (dbg) {
- printf("lex(): com[0x%04X]: %s\n", comid, comment[comid]);
+ memcpy(lexeme, str+i, j);
+ lexeme[j] = '\0';
+ i += j;
+ comid = get_comment(lexeme, dbg);
+ if (comid == 0xFFFF) {
+ /*if (line != lineidx && l[line].com != 0xFFFF) {
+ comid = l[line].com;
+ } else {
+ comid = comidx;
+ }*/
+ comid = comidx;
+ comment[comid] = malloc(j+1);
+ memcpy(comment[comid], lexeme, j+1);
+ comidx++;
+ } else {
+ }
+ if (dbg) {
+ printf("lex(): com[0x%04X]: %s\n", comid, comment[comid]);
+ }
}
lex_type = TOK_COMMENT;
l->count++;
- t = make_token(lex_type, 0, 0, comment[comid]);
+ if (j) {
+ t = make_token(lex_type, 0, 0, comment[comid], NULL);
+ } else {
+ t = make_token(lex_type, 0, 0, "" , NULL);
+ }
+
break;
case PTOK_ALPHA:
- while (isdelm(str[i], dbg) != 16) {
- switch (str[i]) {
- case ')':
- case ',':
- case '.':
- case '+':
- case '<':
- case '>':
- case '-':
- case ':':
- case '=':
- case ';':
- case '\0':
- case '\n':
- isch = 0;
- break;
- default:
- isch = 1;
- lexeme[j++] = str[i++];
- break;
- }
- if (!isch) {
- break;
- }
+ while (!isdelm2(str[i], dbg)) {
+ lexeme[j++] = str[i++];
}
lexeme[j] = '\0';
isch = 0;
@@ -578,41 +521,16 @@ uint64_t lex(char *str, uint64_t address, uint8_t dbg) {
lex_type = TOK_OPCODE;
isop = 1;
l->count++;
- t = make_token(lex_type, 0xFF, k, "");
+ t = make_token(lex_type, 0xFF, k, "", NULL);
break;
}
}
}
}
if (!isop) {
- for (k = 0; lexeme[k] != '\0';) {
- switch (lexeme[k]) {
- case ')':
- case ',':
- case '.':
- case '+':
- case '-':
- case '<':
- case '>':
- case ':':
- case ';':
- case '=':
- case '\0':
- case '\n':
- fall = 1;
- break;
- default:
- fall = 0;
- break;
- }
- if (fall) {
- break;
- }
- k++;
- }
lex_type = TOK_SYM;
l->count++;
- t = make_token(lex_type, 0, 0, "");
+ t = make_token(lex_type, islocal, 0, "", NULL);
memcpy(sym, lexeme, j+1);
uint8_t spaces = 0;
for (; isdelm(str[i+spaces], dbg) == 16; spaces++);
@@ -620,8 +538,9 @@ uint64_t lex(char *str, uint64_t address, uint8_t dbg) {
printf("lex(): spaces: %u\n", spaces);
}
if (str[i+spaces] != ':' && str[i+spaces] != '=') {
- t->word = get_symid(lexeme, address, t, dbg);
- isfixup += (t->word == 0xFFFF);
+ t->sym = get_sym(lexeme, address, t, islocal, dbg);
+ islocal = 0;
+ isfixup += (t->sym == NULL);
if (dbg) {
printf("lex(): isfixup: %u\n", isfixup);
}
@@ -639,31 +558,8 @@ uint64_t lex(char *str, uint64_t address, uint8_t dbg) {
j = 0;
if (lex_type == TOK_OPCODE && !isop) {
j = 0;
- } else {
- if (lex_type == TOK_EXPR) {
- i++;
- } else {
- switch (str[i]) {
- case ')':
- case ',':
- case '.':
- case '+':
- case '-':
- case '<':
- case '>':
- case ':':
- case ';':
- case '=':
- case ' ':
- case '\t':
- case '\n':
- case '\0':
- break;
- default:
- i++;
- break;
- }
- }
+ } else if (lex_type == TOK_EXPR || !isdelm2(str[i], dbg)) {
+ i++;
}
if (lex_type == TOK_COMMENT) {
if (!isstart) {
@@ -679,6 +575,7 @@ uint64_t lex(char *str, uint64_t address, uint8_t dbg) {
lex_type = 0xFF;
case TOK_CSV:
case TOK_IND:
+ case TOK_LOCAL:
memset(lexeme, 0, strlen(lexeme)+1);
case TOK_SYM:
break;
@@ -707,5 +604,6 @@ uint64_t lex(char *str, uint64_t address, uint8_t dbg) {
linenum += 10;
}
}
+ l->addr = address;
return address;
}
diff --git a/lexer.h b/lexer.h
index b8b14b0..e756325 100644
--- a/lexer.h
+++ b/lexer.h
@@ -11,9 +11,30 @@ static inline uint8_t isdelm(char c, uint8_t dbg) {
}
}
+static inline uint8_t isdelm2(char c, uint8_t dbg) {
+ switch (c) {
+ default : return 0;
+ case ')' :
+ case ',' :
+ case '.' :
+ case '+' :
+ case '<' :
+ case '>' :
+ case '-' :
+ case ':' :
+ case '=' :
+ case ';' :
+ case '\0':
+ case '\n': return 1;
+ case '\t':
+ case ' ' : return 2;
+ }
+}
+
static inline uint8_t get_ptok(char c, uint8_t dbg) {
switch (c) {
case '.' : return PTOK_DOT ;
+ case '@' : return PTOK_AT ;
case ':' : return PTOK_COLON ;
case '=' : return PTOK_EQU ;
case '+' : return PTOK_PLUS ;
diff --git a/programs/subasm.s b/programs/subasm.s
index 86a8837..e009ce8 100644
--- a/programs/subasm.s
+++ b/programs/subasm.s
@@ -218,7 +218,7 @@ subasm:
tax ; Reset X.
jsr chk_shcmd ; Did we get a shortend command?
bne parse_cmd ; Yes, so skip everything else.
- jmp subasm_end ;
+ jmp @end ;
jsr chk_cmd ; No, but did we get a full command?
bne parse_cmd ; Yes, so skip everything else.
jsr lexer ; No, so start lexing this line.
@@ -255,32 +255,32 @@ chk_shcmd:
phy #2 ; Preserve the screen buffer position.
txy ; Set our index to zero.
lda (ptr), y ; Is there nothing in the command buffer?
- beq shcmd_fail ; Yes, so return that we failed.
+ beq @false ; Yes, so return that we failed.
cmp #' ' ; No, but is this character, a space?
- beq shcmd_fail ; Yes, so return that we failed.
-shcmd_loop:
+ beq @false ; Yes, so return that we failed.
+@loop:
ldb (ptr2), y ; Are we at the end of the table?
- beq shcmd_fail ; Yes, so return that we failed.
+ beq @false ; Yes, so return that we failed.
cab ; No, so did the character match?
- beq shcmd_fnd ; Yes, so check if there are any arguments.
+ beq @found ; Yes, so check if there are any arguments.
iny ; No, so check the next command.
- jmp shcmd_loop ; Keep looping.
-shcmd_fnd:
+ jmp @loop ; Keep looping.
+@found:
sty f ; Save the command ID.
ldy #1 ; Check the next character in the command buffer.
lda (ptr), y ; Is this the end of the buffer?
- beq shcmd_true ; Yes, so return that we succeded.
+ beq @true ; Yes, so return that we succeded.
cmp #' ' ; No, but is this a space?
- beq shcmd_true ; Yes, so return that we succeded.
- jmp shcmd_fail ; No, so return that we failed.
-shcmd_true:
+ beq @true ; Yes, so return that we succeded.
+ jmp @false ; No, so return that we failed.
+@true:
lda #1 ; Return true.
- jmp shcmd_end ; We are done.
-shcmd_fail:
+ jmp @end ; We are done.
+@false:
ldb #0 ; Reset B.
tba ; Return false.
tax ; Reset X.
-shcmd_end:
+@end:
ply #2 ; Get back the screen buffer position.
rts ; End of chk_shcmd.
@@ -297,7 +297,7 @@ viewmem:
ldx #0 ; Reset X.
ldb #0 ; Reset B.
stb idx1 ; Reset the byte count.
-vmem_lp0:
+@loop:
lda #'\n' ; Print a newline.
jsr print_char ;
jsr print_hi ; Place the address in the string buffer.
@@ -307,14 +307,14 @@ vmem_lp0:
inc idx1 ; Increment the chunk count.
ldb idx1 ; Get the chunk count.
cpb #$10 ; Did we print 16 chunks?
- beq vmem_end ; Yes, so we're done.
+ beq @end ; Yes, so we're done.
lda.q idx0 ; No, so get the address index.
clc ; Prepare for a non carrying add.
adc #$10 ; Add 16 to the address.
sta.q idx0 ; Put it back into the address.
and #0 ; Reset A.
- jmp vmem_lp0 ; Keep looping.
-vmem_end:
+ jmp @loop ; Keep looping.
+@end:
lda #'\n' ; Print a newline.
jsr print_char ;
and #0 ; Reset A.
@@ -323,27 +323,27 @@ vmem_end:
list:
nop ;
-list_end:
+@end:
rts ; End of list.
asm:
nop ;
-asm_end:
+@end:
rts ; End of asm.
help:
nop ;
-help_end:
+@end:
rts ; End of help.
inst:
nop ;
-inst_end:
+@end:
rts ; End of inst.
run:
nop ;
-run_end:
+@end:
rts ; End of run.
set:
nop ;
-set_end:
+@end:
rts ; End of set.
diff --git a/programs/subeditor.s b/programs/subeditor.s
index 0a42c32..26c6f7d 100644
--- a/programs/subeditor.s
+++ b/programs/subeditor.s
@@ -151,9 +151,9 @@ clr_arr:
jsr set_ptr ;
deb ; Set B back to zero.
tba ;
-clr_arr_st:
+@loop:
cpy.w scr_ptr ; Did we clear all of the array?
- bcs clr_arr_end ; Yes, so we're done.
+ bcs @end ; Yes, so we're done.
sta.q (ptr), y ; No, so clear eight bytes.
sta.q (ptr2), y ; Clear eight more bytes.
tya ; Copy the array index.
@@ -166,8 +166,8 @@ clr_arr_st:
adc #$10 ;
tay ;
tba ;
- jmp clr_arr_st ; Keep looping.
-clr_arr_end:
+ jmp @loop ; Keep looping.
+@end:
ldy.w zero ; Set the index back to zero.
plb #1 ; Get whatever was in the B register, back.
rts ; End of clr_arr.
@@ -219,27 +219,27 @@ read:
print_str:
ldx #0 ; Reset X.
sta.q end ; Save the parameter.
-print_str2:
+@reset:
lda.q end ; Get the parameter.
ldb #0 ; Clear the B register.
jsr set_ptr ; Set the first pointer to the parameter.
tba ; Clear the Accumulator.
-pntstr_lp:
+@loop:
ldb #1 ; Enable replace mode.
stb b ;
lda.q ptr ; Get the first pointer.
cmp.q end ; Did the pointer change?
- bne print_str2 ; Yes, so set it back.
+ bne @reset ; Yes, so set it back.
and #0 ; No, reset the accumulator.
phy #2 ; Save the cursor index.
txy ; Copy the string index into Y.
lda (ptr), y ; Are we at the end of the string?
ply #2 ; Get the cursor index back.
- beq pntstr_end ; Yes, so we're done.
+ beq @end ; Yes, so we're done.
inx ; No, so increment the string index.
jsr print_char ; Print the character.
- jmp pntstr_lp ; Keep looping.
-pntstr_end:
+ jmp @loop ; Keep looping.
+@end:
ldb #0 ; Enable insert mode.
stb b ;
rts ; End of print_str.
@@ -334,37 +334,37 @@ getchar:
pha #1 ; Save the character.
phy #2 ; Save the cursor index.
cmp #'\n' ; Was the character that was typed, a newline?
- bne getchar_pnt ; No, so just print the character.
+ bne @print ; No, so just print the character.
jsr cmd_cpy ; Yes, so start copying the line to the command buffer.
-getchar_pnt:
+@print:
ply #2 ; Get back the cursor index.
pla #1 ; Get back the character.
ldb e ; Is the temporary row position non zero?
- bne reset_row ; Yes, so reset the row positon.
-getchar_pt1:
+ bne @row ; Yes, so reset the row positon.
+@print1:
jsr print_char ; No, so print the character.
lda a ; Get the return value.
cmp #'\n' ; Is the return value, a newline?
- beq getchar_ln ; Yes, so return 0.
- jmp getchar_chr ; No, so return 1.
-reset_row:
+ beq @true ; Yes, so return true.
+ jmp @false ; No, so return false.
+@row:
ldb e ; Get the temporary row position.
cpb #maxrow ; Is temporary row position, at, or above the bottom of the screen?
- beq reset_row2 ; Yes, so leave it as is.
- bcs reset_row1 ; No, so set it to the bottom of the screen.
- jmp reset_row2 ; Yes, so leave it as is.
-reset_row1:
+ beq @row2 ; Yes, so leave it as is.
+ bcs @row1 ; No, so set it to the bottom of the screen.
+ jmp @row2 ; Yes, so leave it as is.
+@row1:
ldb #maxrow ; Set the row position to the bottom of the screen.
-reset_row2:
+@row2:
stb scr_row ; Set the row position.
- jmp getchar_pt1 ; Print the character.
-getchar_ln:
- lda #0 ; Return zero.
- jmp getchar_end ; We are done.
-getchar_chr:
- lda #1 ; Return one.
-getchar_end:
- rts ; End of get char.
+ jmp @print1 ; Print the character.
+@true:
+ lda #0 ; Return true.
+ jmp @end ; We are done.
+@false:
+ lda #1 ; Return false.
+@end:
+ rts ; End of getchar.
cmd_cpy:
@@ -372,12 +372,12 @@ cmd_cpy:
sta scr_trow ; Save it for later.
jsr findend ; Find the end of the line.
ldb scr_str ; Has the screen been scrolled?
- beq cmd_cpy3 ; No, so don't subtract the screen's starting point from the line number.
-cmd_cpy2:
+ beq @start ; No, so don't subtract the screen's starting point from the line number.
+@offset:
sec ; Yes, so make sure that we don't subtract by the starting point, plus one.
sbc scr_str ; Offset the row position, back by the screen's starting point.
clc ; Clear the carry flag, so that nothing odd occurs.
-cmd_cpy3:
+@start:
sta scr_row ; Set the row position to the end of the line.
sta e ; Save it into the temporary row posiition.
jsr findst ; Find the start of the line.
@@ -395,53 +395,53 @@ cmd_cpy3:
jsr set_ptr ;
deb ; Set B back to zero.
tba ; Set the accumulator to zero.
-cmd_cpy_lp:
+@loop:
ldb #0 ; Reset the B register.
lda.q (ptr), y ; Get eight bytes from the current line.
-cmd_cpy_lp1:
+@loop1:
phy #2 ; Save the screen index.
txy ; Get the command buffer index.
sta (ptr2), y ; Copy one byte from the screen buffer, to the command buffer.
inx ; Increment the command buffer index.
ply #2 ; Get back the screen index.
cpx.w #$3FF ; Are we at the end of the command buffer?
- bcs cmd_cpy_nd0 ; Yes, so we're done.
+ bcs @end ; Yes, so we're done.
iny ; No, so increment the screen index.
inb ; Increment the byte count.
lsr #8 ; Shift in the next byte.
stb g ; Save the byte count.
tab ; Save the string buffer.
and #$FF ; Is this byte of the buffer, a null terminator?
- beq cmd_cpy_nd ; Yes, so we're done.
+ beq @end1 ; Yes, so we're done.
tba ; No so get back the string buffer.
ldb g ; Get back the byte count.
cpb #7 ; Did we shift in eight bytes?
- beq cmd_cpy_lp ; Yes, so get eight more bytes.
- jmp cmd_cpy_lp1 ; No, so keep shifting in more bytes.
-cmd_cpy_nd0:
+ beq @loop ; Yes, so get eight more bytes.
+ jmp @loop1 ; No, so keep shifting in more bytes.
+@end:
ldb #0 ; Reset B.
phy #2 ; Save the screen index.
txy ; Get the command buffer index.
stb (ptr2), y ; Terminate the command buffer.
ply #2 ; Get back the screen index.
-cmd_cpy_nd:
+@end1:
tab ; The B register is zero, so clear the Accumulator.
rts ; End of cmd_cpy.
findst:
lda #0 ; Reset A.
-findst_lp:
+@loop:
pha #1 ; Save the current line number.
jsr getbit ; Is this the start of the line?
pla #1 ; Get the current line number back.
- bcc findst_done ; Yes, so we're done.
+ bcc @end ; Yes, so we're done.
inc ; No, so check the next physical line.
dec scr_row ; Are we at the top of the screen?
- bpo findst_lp ; No, so keep looping.
+ bpo @loop ; No, so keep looping.
dec ; Yes, so move back one line.
inc scr_row ; Put the row postiion back to zero.
-findst_done:
+@end:
cmp #0 ; Update all the flags.
rts ; End of findst.
@@ -454,12 +454,12 @@ fndend:
tba ; Set the Accumulator to zero.
plb #1 ; Restore the contents of the B register.
phy #2 ;
-fndend_lp:
+@loop:
lda (ptr), y ; Are we at the end of the string?
- beq fndend_done ; Yes, so we're done.
+ beq @end ; Yes, so we're done.
iny ; No, so increment the cursor index.
- jmp fndend_lp ; Keep looping.
-fndend_done:
+ jmp @loop ; Keep looping.
+@end:
sty.w scr_ptr3 ;
ply #2 ;
rts ; End of fndend.
@@ -502,22 +502,22 @@ printc:
lda #0 ; No, so start trying to print a character.
sta d ;
lda (ptr3), y ; Are we at the end of the string?
- beq printc_save ; Yes, so just print the character.
+ beq @save ; Yes, so just print the character.
lda b ; No, but was the flag set?
- bne printc_save ; Yes, so don't shift the line.
+ bne @save ; Yes, so don't shift the line.
sty.w scr_ptr ; No, so save the cursor index for later.
jsr fndend ; Find the end of the line.
- jmp prntc_movln ; Start shifting the line right.
-prntc_updt:
+ jmp @shift ; Start shifting the line right.
+@update:
lda scr_col ; Save the current column position for later.
sta scr_tcol ;
-prntc_updt2:
+@update1:
jsr findend ; Find the end of the line.
sta e ; Use it for redrawing the line.
sta scr_row ; Set the row position to to the end of the line.
jsr findst ; Find the start of the line.
lda scr_row ; Get the start of the line.
-prntc_updt3:
+@update2:
sta f ; Set the starting line, to the start of the line.
jsr rdrw_ln ; Redraw the line.
lda scr_trow ; Get the real row position back.
@@ -526,8 +526,8 @@ prntc_updt3:
sta scr_col ;
jsr update_pos ; Update the cursor's position.
dec d ;
- jmp printc_sav1 ;
-prntc_movln:
+ jmp @save1 ;
+@shift:
ldy.w scr_ptr3 ;
inc scr_ptr3 ;
tyx ;
@@ -541,51 +541,50 @@ prntc_movln:
sta (ptr3), y ; store typed character into the input buffer.
lda scr_row ;
sta scr_trow ;
- jmp prntc_updt ;
-printc_save:
+ jmp @update ;
+@save:
ldb d ;
- bne prntc_updt ;
-printc_sav1:
+ bne @update ;
+@save1:
lda a ;
sta (ptr3), y ; store typed character into the input buffer.
-printc_inc:
+@incr:
inc scr_col ; Increment the cursor's x coordinate.
iny ;
-printc_2:
+@wrapped:
ldb #1 ;
stb f ;
ldb scr_col ;
cpb #maxcol+1 ;
- bcs printc_4 ;
-printc_3:
+ bcs @scrolled ;
+@print:
sta scr ; Echo typed character.
ldb f ;
- beq printc_wrap ;
+ beq @wrap ;
jmp printc_end ;
-printc_4:
+@scrolled:
ldb scr_row ;
cpb #maxrow ;
- bcs printc_scrl ;
-printc_5:
+ bcs @scroll ;
+@wrapped2:
ldb #0 ;
stb f ;
- jmp printc_3 ;
-printc_scrl:
+ jmp @print ;
+@scroll:
sta scr ; Echo typed character.
clc ;
lda #1 ;
sta wrapped ;
jsr scrl_down ;
- jmp printc_wrap ;
-printc_wrap:
+@wrap:
ldb #0
stb scr_col ;
ldb scr_row ;
cpb #maxrow ;
- bcs printc_wrp2 ;
-printc_wrap1:
+ bcs @wrap2 ;
+@wrap1:
inc scr_row ;
-printc_wrp2:
+@wrap2:
phx #2 ;
clc ;
lda scr_row ;
@@ -600,19 +599,19 @@ printc_end:
nl:
lda #0 ; Reset A.
ldb (ptr3), y ; Is this character not a null terminator?
- bne nl1 ; Yes, so don't overwrite it.
+ bne @scroll ; Yes, so don't overwrite it.
sta (ptr3), y ; No, so overwrite it.
-nl1:
+@scroll:
sta scr_col ; Move the cursor to the start of the next line.
lda scr_row ; Get the row position.
cmp #maxrow ; Are we at the bottom of the screen?
- bcc nl_inc ; No, so move down one line.
+ bcc @incr ; No, so move down one line.
jsr scrl_down ; Yes, so scroll down one line.
- jmp nl_end ; We are done.
-nl_inc:
+ jmp @end ; We are done.
+@incr:
inc scr_row ; Move the cursor down by one line.
jsr update_pos ; Update the cursor's position.
-nl_end:
+@end:
lda #'\n' ; Print the newline.
sta a ;
jmp printc_end ;
@@ -667,13 +666,13 @@ back:
sta scr_trow ;
jsr findend ; Find the end of the line.
sta scr_row ; Set our row position to the end of the line.
-back0:
+@find_st:
jsr findst ; Does this line take up more than one real line?
- beq back1 ; No, so skip updating any other lines.
- bcs back_updt ; Yes, so update the other lines.
+ beq @shift ; No, so skip updating any other lines.
+ bcs @update ; Yes, so update the other lines.
lda scr_trow ; Get the real row position back.
sta scr_row ;
-back1:
+@shift:
dey ; Decrement the buffer's offset.
lda #0 ; Place a null terminator
sta (ptr3), y ; into the buffer.
@@ -685,8 +684,8 @@ back1:
lda #$7F ; Print a backspace to the screen.
sta scr ;
lda e ; Are we updating more than one line?
- beq back3 ; No, so skip to the next step.
-back2:
+ beq @load ; No, so skip to the next step.
+@find_end:
jsr findend ; Yes, so find the end of the line.
sta e ; Set the end parameter to it.
lda scr_col ; Save the current column position for now.
@@ -694,44 +693,44 @@ back2:
jsr rdrw_ln ; Start redrawing the line.
lda scr_tcol ; Get the real column position back.
sta scr_col ;
-back3:
- lda scr_trow ; Get the real row position bac.
+@load:
+ lda scr_trow ; Get the real row position back.
sta scr_row ;
dec scr_col ; Move the cursor back by one column,
jsr update_pos ; and update it's position.
jmp printc_end ; We are done.
-back_updt:
+@update:
lda scr_row ; Set the line to start redrawing, to the start of the line.
sta f ;
inc e ; Set the redraw flag to true.
- jmp back1 ; Start shifting the line back.
+ jmp @shift ; Start shifting the line back.
bs:
lda scr_col ; Are we at the far left of the screen?
- beq back_wrap ; Yes, so check for a wrapped line.
+ beq @wrap ; Yes, so check for a wrapped line.
jmp back ; No, so add the backspace to the buffer.
-back_wrap:
+@wrap:
jsr getbit ; Is this line, a wrapped line?
- bcs back_wrap1 ; Yes, so check if the cursor is at the top.
+ bcs @wrap1 ; Yes, so check if the cursor is at the top.
jmp printc_end ; No, so we're done.
-back_wrap1:
+@wrap1:
lda scr_row ; Are we at the top of the screen?
- beq back_wrap2 ; Yes, so check if the screen is at the top of the buffer.
- jmp backwrp ; No, so start clearing the wrap bit.
-back_wrap2:
+ beq @wrap2 ; Yes, so check if the screen is at the top of the buffer.
+ jmp @wrap3 ; No, so start clearing the wrap bit.
+@wrap2:
lda scr_str ; Are we at the top of the buffer?
- bne back_scrl ; Yes, so scroll up.
+ bne @scroll ; Yes, so scroll up.
jmp printc_end ; No, so we're done.
-back_scrl:
+@scroll:
clc ; Clear the carry flag, so that we don't get odd behaviour.
jsr scrl_up ; Scroll up.
inc scr_row ; Move down by one row.
-backwrp:
+@wrap3:
clc ; Clear the carry flag.
lda scr_row ; Add the cursor's row position,
adc scr_str ; and the screen's starting row.
tax ; Transfer that into X.
-backwrp2:
+@wrap4:
dec scr_row ; Move up by one row.
ldb #maxcol+1 ; Move the cursor to the absolute right of the screen.
stb scr_col ;
@@ -740,20 +739,20 @@ backwrp2:
shftln:
ldb d ; Is the flag not set?
- beq shftln_lp1 ; Yes, so shift, and decrement.
+ beq @dec_loop ; Yes, so shift, and decrement.
ldb #0 ; Clear the B register.
- jmp shftln_lp0 ; No, so shift, and increment.
-shftln_neg:
+ jmp @inc_loop ; No, so shift, and increment.
+@neg:
ldy.w zero ; Set the source poition to 0.
stb (ptr3), y ; Clear the character that is in the source.
- jmp shftln_end ; We are done.
-shftln_lp0:
+ jmp @end ; We are done.
+@inc_loop:
sty.w scr_ptr2 ; Save the source position for later.
ldy.w scr_ptr ; Get the previous cursor index.
cpy.w scr_ptr2 ; Is the source position, at, or below the cursor index?
- beq shftln_lp01 ; Yes, so keep looping.
- bcs shftln_end ; No, so we're done.
-shftln_lp01:
+ beq @inc_loop1 ; Yes, so keep looping.
+ bcs @end ; No, so we're done.
+@inc_loop1:
ldy.w scr_ptr2 ; Get the source position.
lda (ptr3), y ; Get the character from the source position.
phy #2 ; Save the source position for later.
@@ -761,14 +760,14 @@ shftln_lp01:
sta (ptr3), y ; Place the character from the source position, to the destination position.
ply #2 ; Set our position back to the source.
stb (ptr3), y ; Clear the character that is in the source.
- bng shftln_neg ; The source underflowed, so set it back to zero,
+ bng @neg ; The source underflowed, so set it back to zero,
dey ; Decrement the source position.
dex ; Decrement the destination position.
- jmp shftln_lp0 ; Keep looping.
-shftln_lp1:
+ jmp @inc_loop ; Keep looping.
+@dec_loop:
stx.w scr_ptr2 ; Save the destination position for later.
lda (ptr3), y ; Is the character at the source position, a null terminator?
- beq shftln_end1 ; Yes, so we're done.
+ beq @end3 ; Yes, so we're done.
phy #2 ; No, so save the source position for later.
txy ; Set our position to the destination.
sta (ptr3), y ; Place the character from the source position, to the destination position.
@@ -776,44 +775,44 @@ shftln_lp1:
ply #2 ; Set our position back to the source.
stb (ptr3), y ; Clear the character that is in the source.
iny ; Increment the source position.
- jmp shftln_lp1 ; Keep looping.
-shftln_wrap:
+ jmp @dec_loop ; Keep looping.
+@wrap:
tax ; Use the ending line as a parameter for setbit.
jsr setbit ; Set the wrap bit of the ending line.
- jmp shftln_end2 ; We are done.
-shftln_wrp1:
+ jmp @end5 ; We are done.
+@wrap1:
tax ; Use the ending line as a parameter for clrbit.
jsr clrbit ; Clear the wrap bit of the ending line.
- jmp shftln_end2 ; We are done.
-shftln_end:
+ jmp @end5 ; We are done.
+@end:
lda (ptr3), y ; Is this character a null terminator?
- bne shftln_nd0 ; No, so just find the end of the line.
+ bne @end1 ; No, so just find the end of the line.
lda #$20 ; Yes, so convert it to a space for now.
sta (ptr3), y ;
-shftln_nd0:
+@end1:
jsr findend ; Find the ending line.
sta d ; Save ending line for later.
lda (ptr3), y ; Is this character a space?
cmp #$20 ;
- bne shftln_nd1 ; No, so skip the conversion.
+ bne @end5 ; No, so skip the conversion.
lda #0 ; Yes, so convert it back to zero.
sta (ptr3), y ;
-shftln_nd1:
+@end2:
lda d ; Get the ending line.
cmp scr_row ; Is the ending line greater than the starting line?
- beq shftln_end2 ; No, so we're done.
- bcs shftln_wrap ; Yes, so set the wrap bit.
- jmp shftln_end2 ; No, so we're done.
-shftln_end1:
+ beq @end5 ; No, so we're done.
+ bcs @wrap ; Yes, so set the wrap bit.
+ jmp @end5 ; No, so we're done.
+@end3:
jsr findend ; Find the ending line.
cpb #0 ; Is the remainder zero?
- beq shftln_nd2 ; Yes, so check if the ending line is greater than the starting line.
- jmp shftln_end2 ; No, so we're done.
-shftln_nd2:
+ beq @end4 ; Yes, so check if the ending line is greater than the starting line.
+ jmp @end5 ; No, so we're done.
+@end4:
cmp scr_row ; Is the ending line greater than the starting line?
- beq shftln_end2 ; No, so we're done.
- bcs shftln_wrp1 ; Yes, so clear the wrap bit.
-shftln_end2:
+ beq @end5 ; No, so we're done.
+ bcs @wrap1 ; Yes, so clear the wrap bit.
+@end5:
rts ; End of shftln.
esc:
@@ -864,35 +863,36 @@ shftesc_end:
isup:
lda c ; Load the escape code into the accumulator.
cmp #'A' ; Did the user press the up arrow key?
- bne isup_done ; No, so we're done.
+ bne @end ; No, so we're done.
lda scr_row ; Yes, but is the cursor at the top of the screen?
- beq isup_scrl ; Yes, so check if we need to scroll.
-isup_2:
+ beq @scroll ; Yes, so check if we need to scroll.
+@check2:
lda c ; No, so load the escape code back into the accumulator.
cmp #'A' ; Did the user press the up arrow key?
beq up ; Yes, so move the cursor up.
- jmp isup_done ; No, so we're done
-isup_scrl:
+ jmp @end ; No, so we're done.
+@scroll:
lda scr_str ; Are we at the top of the screen buffer?
- beq isup_done ; Yes, so we're done.
+ beq @end ; Yes, so we're done.
jsr scrl_up ; No, so scroll up.
lda #1 ; Tell the escape routine that we were successful.
sta d ;
+@end:
isup_done:
rts ; End of isup.
isdown:
lda c ; Load the escape code into the accumulator.
cmp #'B' ; Did the user press the down arrow key?
- bne isdown_done ; No, so we're done.
+ bne @end ; No, so we're done.
lda scr_row ; Yes, so start checking the y coordinate of the cursor.
cmp #maxrow ; Is the cursor at the bottom of the screen?
- beq isdown_scrl ; Yes, so scroll down.
+ beq @scroll ; Yes, so scroll down.
lda c ; No, so load the escape code back into the accumulator.
cmp #'B' ; Did the user press the down arrow key?
beq down ; Yes, so move the cursor down.
- jmp isdown_done
-isdown_scrl:
+ jmp @end ; No, so we're done.
+@scroll:
lda scr_row ; Save the cursor's row number.
sta scr_trow ;
lda scr_col ; Save the cursor's column number.
@@ -904,42 +904,44 @@ isdown_scrl:
sta scr_col ;
lda #1 ; Tell the escape routine that we were successful.
sta d ;
+@end:
isdown_done:
rts ; End of isdown.
isright:
lda c ; Load the escape code into the accumulator.
cmp #'C' ; Did the user press the right arrow key?
- bne isright_dne ; No, so we're done.
+ bne @end2 ; No, so we're done.
lda scr_col ; Yes, so start checking the x coordinate of the cursor.
cmp #maxcol ; Is the cursor at the far right of the screen?
- beq isright_wrp ; Yes, so check if this is a wrapped line.
+ beq @wrap ; Yes, so check if this is a wrapped line.
jmp right ; No, so move the cursor right, like normal.
-isright_wrp:
+@wrap:
inc scr_row ; Move down a row.
jsr getbit ; Is the current line, a wrapped line?
- bcs wrap_inc ; Yes, so leave the cursor where it is.
+ bcs @incr ; Yes, so leave the cursor where it is.
dec scr_row ; No, so move the cursor back up a row.
- jmp isright_dne ; We are done.
-isright_scr:
+ jmp @end2 ; We are done.
+@scroll:
lda scr_str ; Are we at the top of the screen buffer?
- beq isright_end ; Yes, so we're done.
+ beq @end ; Yes, so we're done.
lda #1 ; No, so scroll down.
sta wrapped ; Set the wrapped flag.
jsr scrl_down ; Scroll down.
- jmp isright_end ; We are done.
-wrap_inc:
+ jmp @end ; We are done.
+@incr:
lda #0 ; Set the cursor to the far left of the screen.
sta scr_col ;
lda scr_row ; Get the current row number.
cmp #maxrow ; Are we at the bottom of the screen?
- beq isright_nd2 ; No, so we're done.
- bcs isright_scr ; Yes, so check if we are scrolling down.
- jmp isright_nd2 ; No, so we're done.
-isright_end:
+ beq @end1 ; No, so we're done.
+ bcs @scroll ; Yes, so check if we are scrolling down.
+ jmp @end1 ; No, so we're done.
+@end:
dec scr_row ; Move back up a row.
-isright_nd2:
+@end1:
jsr update_pos ; Update the cursor position.
+@end2:
isright_dne:
lda #0 ; Unset the wrapped flag.
sta wrapped ;
@@ -948,40 +950,41 @@ isright_dne:
isleft:
lda c ; Load the escape code into the accumulator.
cmp #'C' ; Did the user press right?
- beq isleft_done ; Yes, so we're done
+ beq @end1 ; Yes, so we're done
lda scr_col ; No, but is the cursor at the far left of the screen?
- beq isleft_wrp ; Yes, so start checking if this is a wrapped line.
+ beq @wrap ; Yes, so start checking if this is a wrapped line.
lda c ; No, so load the escape code back into the accumulator.
cmp #'D' ; Did the user press the left arrow key?
beq left ; Yes, so move the cursor left.
- jmp isleft_done ; No, so we're done.
-isleft_wrp:
+ jmp @end1 ; No, so we're done.
+@wrap:
jsr getbit ; Is the current line, a wrapped line?
- bcs wrap_dec ; Yes, so wrap back up a line.
- jmp isleft_done ; No, so we're done.
-wrap_dec:
+ bcs @decr ; Yes, so wrap back up a line.
+ jmp @end1 ; No, so we're done.
+@decr:
lda scr_row ; Is the cursor at the top of the screen?
- beq wrap_dec1 ; Yes, so don't move up a line.
+ beq @decr1 ; Yes, so don't move up a line.
lda #1 ; No, so set the wrapped flag.
sta wrapped ;
dec scr_row ; Move the cursor up one line.
-wrap_dec1:
+@decr1:
lda #maxcol ; Move the Cursor to the far right of the screen.
sta scr_col ;
lda #1 ; Tell the escape routine that we were successful.
sta d ;
lda scr_row ; Are we at the top of the screen?
- beq isleft_scrl ; Yes, so check if we need to scroll.
- jmp isleft_end ; No, so we're done.
-isleft_scrl:
+ beq @scroll ; Yes, so check if we need to scroll.
+ jmp @end ; No, so we're done.
+@scroll:
lda wrapped ; Was the wrapped flag set somewhere else?
- bne isleft_end ; Yes so we're done.
+ bne @end ; Yes so we're done.
lda scr_str ; No, but are we actually at the top of the screen buffer?
- beq isleft_done ; Yes, so we're done.
+ beq @end1 ; Yes, so we're done.
jsr scrl_up ; No, so scroll up.
- jmp isleft_done ; We are done.
-isleft_end:
+ jmp @end1 ; We are done.
+@end:
jsr update_pos ; Update the cursor position.
+@end1:
isleft_done:
lda #0 ; Unset the wrapped flag.
sta wrapped ;
@@ -1082,7 +1085,7 @@ getcol:
sta scr ; to the screen.
lda scr_col ; Get the cursor's x coordinate.
div #10 ; Divide A by 10.
- clc
+ clc ;
adc #'0' ; Convert it to ascii, and
sta scr ; print to the screen.
tba ; Get the remainder.
@@ -1103,26 +1106,26 @@ scrl_down:
lda scr_row ; Get the cursor's line number.
pha #1 ; Save it in the stack.
lda wrapped ; Was the wrapped flag set?
- beq scrldn_save ; Yes, so save the cursor position.
-scrldn1:
- jsr rdrw_row ; Redraw this row.
+ beq @save ; Yes, so save the cursor position.
+@redraw:
+ jsr rdrw_row ; No, so redraw this row.
lda wrapped ; Was the wrapped flag set?
- beq scrldn_load ; Yes, so load the previous cursor position back.
- jmp scrldn_end ; No, so we're done.
-scrldn_save:
+ beq @load ; Yes, so load the previous cursor position back.
+ jmp @end ; No, so we're done.
+@save:
lda scr_col ; Get the cursor's column number.
pha #1 ; Save it in the stack.
- jmp scrldn1 ; Start redrawing the current row.
-scrldn_load:
+ jmp @redraw ; Start redrawing the current row.
+@load:
pla #1 ; Get the cursor's previous column number back.
sta scr_col ;
-scrldn_end:
+@end:
pla #1 ; Get the cursor's previous line number back.
sta scr_row ;
jsr update_pos ; Update the cursor's position.
lda #0 ; Clear the wrapped flag.
sta wrapped ;
-scrldn_done:
+@end1:
rts ; End of scrl_down.
scrl_up:
@@ -1146,37 +1149,37 @@ scrl_up:
pla #1 ;
sta scr_row ;
jsr update_pos ;
-scrlup_done:
+@end:
rts ;
rdrw_row:
lda #0 ;
sta scr_col ;
jsr update_pos ;
-rdrow_st:
+@loop:
lda (ptr3), y ;
- beq rdrow_inc ;
+ beq @incr ;
sta scr ;
-rdrow_inc:
+@incr:
inc scr_col ;
lda (ptr3), y ;
- beq rdrow_skip ;
-rdrow_inc1:
+ beq @skip ;
+@incr1:
iny ;
-rdrow_inc2:
+@incr2:
lda scr_col ;
cmp #maxcol+1 ;
- bcs rdrow_end ;
- jmp rdrow_st ;
-rdrow_skip:
+ bcs @end ;
+ jmp @loop ;
+@skip:
lda #' ' ;
sta scr ; to the screen.
- jmp rdrow_inc1 ;
-rdrow_end:
+ jmp @incr1 ;
+@end:
lda #0 ;
sta scr_col ;
jsr update_pos ;
-rdrow_done:
+@end1:
rts ;
rdrw_ln:
@@ -1187,17 +1190,17 @@ rdrw_ln:
lda scr_col ;
pha #1 ;
jsr update_pos ;
-rdrwln_lp:
+@loop:
lda scr_row ;
cmp e ;
- beq rdrwln_lp1 ;
- bcs rdrwln_done ;
-rdrwln_lp1:
+ beq @loop1 ;
+ bcs @end ;
+@loop1:
jsr rdrw_row ;
-rdrwln_inc:
+@incr:
inc scr_row ;
- jmp rdrwln_lp ;
-rdrwln_done:
+ jmp @loop ;
+@end:
pla #1 ;
sta scr_col ;
pla #1 ;
@@ -1210,21 +1213,21 @@ rdrwln_done:
set_ptr:
cpb #1 ; Are we setting the second pointer?
- beq set_ptr2 ; Yes, so start setting it.
+ beq @ptr2 ; Yes, so start setting it.
cpb #2 ; No, but are we setting the third pointer?
- beq set_ptr3 ; Yes, so start setting it.
-set_ptr1:
+ beq @ptr3 ; Yes, so start setting it.
+@ptr1:
stb.q ptr ; Reset the first pointer.
sta.q ptr ; No, so set the first pointer.
- jmp setptr_end ; We are done.
-set_ptr2:
+ jmp @end ; We are done.
+@ptr2:
stb.q ptr2 ; Reset the second pointer.
sta.q ptr2 ; Set the second pointer.
- jmp setptr_end ; We are done.
-set_ptr3:
+ jmp @end ; We are done.
+@ptr3:
stb.q ptr3 ; Reset the third pointer.
sta.q ptr3 ; Set the third pointer.
-setptr_end:
+@end:
rts ; End of set_ptr.
; Entry point for SuBAsm.
diff --git a/programs/utils.s b/programs/utils.s
index a6a14f3..6032a47 100644
--- a/programs/utils.s
+++ b/programs/utils.s
@@ -30,7 +30,7 @@ print_hi:
print_lo:
lda #0 ; Reset A.
sta idx3 ; Clear the string index.
-pntlo_lp:
+@loop:
ldx #2 ; Set digit count to 2.
pha #1 ; Preserve the nibble offset.
jsr print_hex ; Print the low nibble offset.
@@ -41,14 +41,14 @@ pntlo_lp:
pla #1 ; Get the nibble offset back.
inc ; Increment the offset.
cmp #$10 ; Are we at the last offset?
- bcs pntlo_end ; Yes, so we're done.
-pntlo_lp1:
+ bcs @end ; Yes, so we're done.
+@loop1:
pha #1 ; No, so preserve the nibble offset.
lda #' ' ; Add a space to the string buffer.
jsr charcpy ;
pla #1 ; Get the nibble offset back.
- jmp pntlo_lp ; Keep looping.
-pntlo_end:
+ jmp @loop ; Keep looping.
+@end:
inx ; Increment the index by one.
lda #0 ; Null terminate the string buffer.
sta strbuf, x ;
@@ -61,7 +61,7 @@ print_chunk:
ldx #0 ; Reset X.
phy #2 ; Preserve the screen buffer index.
txy ; Copy the byte index to it.
-pntchnk_lp:
+@loop:
and #0 ; Reset A.
ldx #2 ; Set the digit count to 2.
lda (idx0), y ; Get the byte at that address.
@@ -72,11 +72,11 @@ pntchnk_lp:
jsr charcpy ;
iny ; Increment the byte index.
cpy #$10 ; Have we read 16 bytes?
- beq pntchnk_end ; Yes, so we're done.
+ beq @end ; Yes, so we're done.
lda #' ' ; No, so add a soace to the string buffer.
jsr charcpy ;
- jmp pntchnk_lp ; Keep looping.
-pntchnk_end:
+ jmp @loop ; Keep looping.
+@end:
ply #2 ; Get the screen buffer index back.
inx ; Increment the index by one.
and #0 ; Null terminate the string.
@@ -99,7 +99,7 @@ print_hex:
jsr set_ptr ;
ldb #0 ; Reset B.
pla #8 ; Get the hex value back.
-pnthex_lp:
+@loop:
pha #8 ; Preserve the hex value.
and #$F ; Mask the lowest nibble.
phy #2 ; Preserve the screen buffer position.
@@ -109,23 +109,23 @@ pnthex_lp:
sta (ptr3) ; Save the hex digit character in the string.
ply #2 ; Get back the screen buffer position.
pla #8 ; Get the hex value back.
-pnthex_lp1:
+@isauto:
cpx #1 ; Is the digit count less than one?
- bcc pnthex_lp2 ; Yes, so don't decrement the digit count.
+ bcc @auto ; Yes, so don't decrement the digit count.
dex ; No, but was the digit count zero, when decremented?
- beq pnthex_end ; Yes, so we're done.
- jmp pnthex_lp3 ; No, so get the next nibble.
-pnthex_lp2:
+ beq @end ; Yes, so we're done.
+ jmp @next ; No, so get the next nibble.
+@auto:
ldb #1 ; Enable auto digit count.
-pnthex_lp3:
- lsr #4 ; No, but is the next nibble, a zero?
- beq pnthex_lp4 ; Yes, so check if auto digit count is enabled.
- jmp pnthex_lp ; No, so print the next digit.
-pnthex_lp4:
+@next:
+ lsr #4 ; Is the next nibble, a zero?
+ beq @isauto1 ; Yes, so check if auto digit count is enabled.
+ jmp @loop ; No, so print the next digit.
+@isauto1:
cpb #1 ; Is auto digit count enabled?
- beq pnthex_end ; Yes, so we're done.
- jmp pnthex_lp ; No, so keep printing more digits.
-pnthex_end:
+ beq @end ; Yes, so we're done.
+ jmp @loop ; No, so keep printing more digits.
+@end:
rts ; End of print_hex.
diff --git a/sux.c b/sux.c
index dcdd79b..41fbb5a 100644
--- a/sux.c
+++ b/sux.c
@@ -103,23 +103,14 @@ void *run(void *args) {
}
wmove(scr, lines, 1);
wclrtoeol(scr);
- wprintw(scr,
- "pc: $%04"PRIX64
- ", a: $%016"PRIX64
- ", b: $%016"PRIX64
- ", x: $%016"PRIX64
- ", y: $%016"PRIX64
- , cpu->pc[thread]
- , cpu->a[thread]
- , cpu->b[thread]
- , cpu->x[thread]
- , cpu->y[thread]);
- wprintw(scr,
- ", sp: $%04X"
- ", ps: $%02X"
- ", inst: "
- , cpu->sp[thread]
- , cpu->ps.u8[thread]);
+ wprintw(scr, "pc: $%04"PRIX64 , cpu->pc[thread]);
+ wprintw(scr, ", a: $%016"PRIX64, cpu->a[thread]);
+ wprintw(scr, ", b: $%016"PRIX64, cpu->b[thread]);
+ wprintw(scr, ", x: $%016"PRIX64, cpu->x[thread]);
+ wprintw(scr, ", y: $%016"PRIX64, cpu->y[thread]);
+ wprintw(scr, ", sp: $%04X", cpu->sp[thread]);
+ wprintw(scr, ", ps: $%02X", cpu->ps.u8[thread]);
+ wprintw(scr, ", inst: ");
#if keypoll
pthread_mutex_unlock(&mutex);
#endif
generated by cgit v1.2.3-13-gbd6f (git 2.30.0) at 2024-12-25 17:34:16 +0000