1 files changed, 388 insertions, 0 deletions
diff --git a/programs/sub-suite/subasm.s b/programs/sub-suite/subasm.s
new file mode 100644
index 0000000..9c6c3f0
--- /dev/null
+++ b/programs/sub-suite/subasm.s
@@ -0,0 +1,388 @@
+; SuBAsm
+; The Sux Bootstrapped Assembler.
+;
+; by mr b0nk 500 <b0nk@b0nk.xyz>
+
+MAX_SYM = $800		; Max symbol size.
+OPNUM	= 88		; Instruction count.
+
+.include "lexer.s"
+.include "utils.s"
+
+.org incl
+; String Constants.
+asm_name:
+	.byte "SuBAsm"
+asm_ver:
+	.byte "0.1"
+
+; Directives.
+dir:
+	.byte "org"
+	.byte "byte"
+	.byte "word"
+	.byte "dword"
+	.byte "qword"
+	.byte "include"
+
+; Short form Commands.
+sh_cmds:
+	.byte "vlahirs"
+
+; Commands.
+cmds:
+	.byte "viewmem"
+	.byte "list"
+	.byte "asm"
+	.byte "help"
+	.byte "inst"
+	.byte "run"
+	.byte "set"
+
+; Instruction mnemonics, and opcodes.
+
+; Legend.
+; mne = Mnemonic.
+; imm = Immediate data.
+; zm  = Zero Matrix.
+; zmx = Zero Matrix, indexed with X.
+; zmy = Zero Matrix, indexed with Y.
+; ind = Indirect.
+; idx = Indexed Indirect.
+; idy = Indirect Indexed.
+; abs = Absolute.
+; imp = Implied.
+
+mne:
+;	       mne   imm,  zm, zmx, zmy, ind, idx, idy, abs, imp
+	.byte "CPS", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $00
+	.byte "ADC", $01, $06, $FF, $FF, $FF, $FF, $FF, $04, $FF
+	.byte "AAB", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $02
+	.byte "PHP", $08, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
+	.byte "CPB", $09, $2D, $FF, $FF, $55, $AD, $AC, $2C, $FF
+	.byte "PHB", $0A, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
+	.byte "DEC", $FF, $0D, $FF, $FF, $FF, $FF, $FF, $0C, $E5
+	.byte "JMP", $FF, $0E, $FF, $FF, $CE, $FF, $FF, $10, $FF
+	.byte "SBC", $11, $16, $FF, $FF, $FF, $FF, $FF, $14, $FF
+	.byte "SAB", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $12
+	.byte "ENT", $18, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
+	.byte "CPY", $19, $3D, $FF, $FF, $85, $FF, $FF, $4C, $FF
+	.byte "PLB", $1A, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
+	.byte "INC", $FF, $1D, $FF, $FF, $FF, $FF, $FF, $1C, $F5
+	.byte "JSR", $FF, $1E, $FF, $FF, $BE, $FF, $FF, $20, $FF
+	.byte "AND", $21, $26, $FF, $FF, $FF, $FF, $FF, $24, $FF
+	.byte "ABA", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $22
+	.byte "PLP", $28, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
+	.byte "CPX", $29, $4D, $FF, $FF, $B5, $FF, $FF, $3C, $FF
+	.byte "PHY", $2A, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
+	.byte "BPO", $FF, $2E, $FF, $FF, $FF, $FF, $FF, $30, $FF
+	.byte "ORA", $31, $36, $FF, $FF, $FF, $FF, $FF, $34, $FF
+	.byte "OAB", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $32
+	.byte "STT", $38, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
+	.byte "PLY", $3A, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
+	.byte "BNG", $FF, $3E, $FF, $FF, $FF, $FF, $FF, $40, $FF
+	.byte "XOR", $41, $46, $FF, $FF, $FF, $FF, $FF, $44, $FF
+	.byte "XAB", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $42
+	.byte "PHA", $48, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
+	.byte "PHX", $4A, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
+	.byte "BCS", $FF, $4E, $FF, $FF, $FF, $FF, $FF, $50, $FF
+	.byte "LSL", $51, $56, $FF, $FF, $FF, $FF, $FF, $54, $FF
+	.byte "LLB", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $52
+	.byte "CLC", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $58
+	.byte "PLX", $5A, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
+	.byte "BCC", $FF, $5E, $FF, $FF, $FF, $FF, $FF, $60, $FF
+	.byte "LSR", $61, $66, $FF, $FF, $FF, $FF, $FF, $64, $FF
+	.byte "LRB", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $62
+	.byte "PLA", $68, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
+	.byte "TAB", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $6A
+	.byte "BEQ", $FF, $6E, $FF, $FF, $FF, $FF, $FF, $70, $FF
+	.byte "ROL", $71, $76, $FF, $FF, $FF, $FF, $FF, $74, $FF
+	.byte "RLB", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $72
+	.byte "SEC", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $78
+	.byte "TBA", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $7A
+	.byte "BNE", $FF, $7E, $FF, $FF, $FF, $FF, $FF, $80, $FF
+	.byte "ROR", $81, $86, $FF, $FF, $FF, $FF, $FF, $84, $FF
+	.byte "RRB", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $82
+	.byte "DEY", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $88
+	.byte "TAY", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $8A
+	.byte "BVS", $FF, $8E, $FF, $FF, $FF, $FF, $FF, $90, $FF
+	.byte "MUL", $91, $96, $FF, $FF, $FF, $FF, $FF, $94, $FF
+	.byte "MAB", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $92
+	.byte "CLI", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $98
+	.byte "TYA", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $9A
+	.byte "BVC", $FF, $9E, $FF, $FF, $FF, $FF, $FF, $A0, $FF
+	.byte "DIV", $A1, $A6, $FF, $FF, $FF, $FF, $FF, $A4, $FF
+	.byte "DAB", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $A2
+	.byte "INY", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $A8
+	.byte "TAX", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $AA
+	.byte "RTS", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $AE
+	.byte "CMP", $B1, $B6, $FF, $FF, $25, $7D, $7C, $B4, $FF
+	.byte "CAB", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $B2
+	.byte "SEI", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $B8
+	.byte "LDX", $B9, $BD, $FF, $C9, $95, $FF, $FF, $BC, $FF
+	.byte "TXA", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $BA
+	.byte "RTI", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $C0
+	.byte "LDA", $C1, $C6, $79, $39, $05, $5D, $5C, $C4, $FF
+	.byte "DEX", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $C5
+	.byte "CLV", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $C8
+	.byte "TYX", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $CA
+	.byte "STA", $FF, $CD, $89, $49, $15, $6D, $6C, $CC, $FF
+	.byte "TSX", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $D0
+	.byte "LDB", $D1, $D6, $99, $59, $35, $8D, $8C, $D4, $FF
+	.byte "INX", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $D5
+	.byte "WAI", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $D8
+	.byte "TXY", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $DA
+	.byte "STB", $FF, $DD, $A9, $69, $45, $9D, $9C, $DC, $FF
+	.byte "TXS", $E0, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
+	.byte "LDY", $E1, $E6, $E9, $FF, $65, $FF, $FF, $E4, $FF
+	.byte "BRK", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $E8
+	.byte "NOP", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $EA
+	.byte "STY", $FF, $ED, $F9, $FF, $75, $FF, $FF, $EC, $FF
+	.byte "DEB", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $EE
+	.byte "ASR", $F1, $F6, $FF, $FF, $FF, $FF, $FF, $F4, $FF
+	.byte "ARB", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $F2
+	.byte "STX", $FF, $FD, $FF, $D9, $A5, $FF, $FF, $FC, $FF
+	.byte "INB", $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FE
+
+; Command subroutine table.
+cmd_srt:
+	.word viewmem
+	.word list
+	.word asm
+	.word help
+	.word inst
+	.word run
+	.word set
+
+; Data entry point for the lexer.
+lexer_data:
+
+
+; Token table.
+.org $20000
+tokline:
+
+.org cmd_buf+$400
+; Program Counter.
+prg_cnt:
+	.qword 0
+; Hex digit string buffer.
+hex_str:
+	.qword 0, 0
+; String buffer.
+strbuf:
+
+.org strbuf+$80
+; Subroutine pointer.
+sub_ptr:
+	.word 0
+
+; Indecies.
+idx0:
+	.qword 0
+idx1:
+	.qword 0
+idx2:
+	.qword 0
+idx3:
+	.qword 0
+
+; Current token line.
+ctok:
+	.word 0
+
+; Last token line.
+ltok:
+	.word 0
+
+; Lexeme type.
+lex_type:
+	.byte 0
+
+; Lexeme string.
+lexeme:
+
+; Symbol table.
+.org lexeme+$100
+sym:
+
+; Fixup table.
+; Fixups are unresolved symbols.
+.org sym+$8000
+fix:
+
+
+; Start of program code.
+.org parser
+subasm:
+	ldb #0		; Set the first pointer
+	lda.d #cmd_buf	; to the command buffer.
+	jsr set_ptr	;
+	tba		; Reset A.
+	tax		; Reset X.
+	jsr chk_shcmd	; Did we get a shortend command?
+	bne @cmd	; Yes, so skip everything else.
+	jsr chk_cmd	; No, but did we get a full command?
+	bne @cmd	; Yes, so skip everything else.
+	jsr lex		; No, so start lexing this line.
+	jmp @end	; We are done.
+@cmd:
+	ldb #1		; Set the second pointer
+	lda.d #cmd_srt	; to the command subroutine table.
+	jsr set_ptr	;
+	deb		; Reset B.
+	tba		; Reset A.
+	lda f		; Get the command ID.
+	cmp #8		; Is the command ID greater than the command count?
+	bcs @end	; Yes, so we're done.
+	lsl #1		; No, so multiply the command ID by two.
+	phy #2		; Preserve the screen buffer position.
+	tay		; Set the index to the offset that we just calculated.
+	lda.w (ptr2), y	; Get the command subroutine, from the command subroutine table.
+	ply #2		; Get back the screen buffer position.
+	ldb #2		; Save it in the third pointer.
+	jsr set_ptr	;
+	ldb #0		; Reset B.
+	jsr (ptr3)	; Run the command's subroutine.
+@end:
+	rts		; End of subasm.
+
+chk_shcmd:
+	tba		; Reset A.
+	inb		; Set the second pointer
+	lda.w #sh_cmds	; to the shortend command table.
+	jsr set_ptr	;
+	deb		; Reset B.
+	tba		; Reset A.
+	phy #2		; Preserve the screen buffer position.
+	txy		; Set our index to zero.
+	lda (ptr), y	; Is there nothing in the command buffer?
+	beq @false	; Yes, so return that we failed.
+	cmp #' '	; No, but is this character, a space?
+	beq @false	; Yes, so return that we failed.
+	jsr tolower	; No, so convert it to lowercase.
+@loop:
+	ldb (ptr2), y	; Are we at the end of the table?
+	beq @false	; Yes, so return that we failed.
+	cab		; No, so did the character match?
+	beq @found	; Yes, so check if there are any arguments.
+	iny		; No, so check the next command.
+	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 @true	; Yes, so return that we succeded.
+	cmp #' '	; No, but is this a space?
+	beq @true	; Yes, so return that we succeded.
+	jmp @false	; No, so return that we failed.
+@true:
+	lda #1		; Return true.
+	jmp @end	; We are done.
+@false:
+	ldb #0		; Reset B.
+	tba		; Return false.
+	tax		; Reset X.
+@end:
+	ply #2		; Get back the screen buffer position.
+	rts		; End of chk_shcmd.
+
+
+chk_cmd:
+	tba		; Reset A.
+	tax		; Reset X.
+	sta.q idx0	; Reset the first index.
+	sta.q idx1	; Reset the second index.
+@loop:
+	lda.w #cmds	; Get pointer to the start of the command table.
+	clc		; Prepare for a non carrying add.
+	adc.w idx0	; Offset the pointer, by the length of the previous string.
+	pha #8		; Preserve the command string pointer.
+	jsr strcasecmp	; Is the command buffer, the same as the command string?
+	pla #8		; Get the command string pointer back.
+	beq @true	; Yes, so return true.
+	ldb idx1	; No, so Get the command ID.
+	cpb #7		; Have we reached the end of the command table?
+	beq @false	; Yes, so return false.
+	inc idx1	; No, so increment the command ID.
+@getlen:
+	jsr strlen	; Get the string's length.
+	inx		; Add one to the length.
+	txa		; Place it in the accumulator.
+	clc		; Prepare for a non carrying add.
+	adc.w idx0	; Add the string offset to the current length
+	sta.w idx0	; Save the offset in the first index.
+	jmp @loop	; Keep looping.
+@true:
+	ldb idx1	; Get the command ID.
+	stb f		; Return the command ID.
+	ldb #1		; Return true.
+	jmp @end	; We are done.
+@false:
+	ldb #0		; Return false.
+@end:
+	rts		; End of chk_cmd.
+
+viewmem:
+	lda.q prg_cnt	; Get the program counter.
+	sta.q idx0	; Save the address in the first index.
+	and #$F0	; Clear the first four bits of the address.
+	sta idx0	; Overwrite the first byte, with the masked byte.
+	lda #19		; Move the cursor to the right, by 19 columns.
+	sta scr_col	;
+	jsr update_pos	;
+	jsr print_lo	; Print the low nibble offsets.
+	ldx #0		; Reset X.
+	ldb #0		; Reset B.
+	stb idx1	; Reset the byte count.
+@loop:
+	lda #'\n'	; Print a newline.
+	jsr print_char	;
+	jsr print_hi	; Place the address in the string buffer.
+	jsr print_chunk	; Place the next 16 bytes in the string buffer.
+	lda.d #strbuf	; Print the string buffer.
+	jsr print_str	;
+	inc idx1	; Increment the chunk count.
+	ldb idx1	; Get the chunk count.
+	cpb #$10	; Did we print 16 chunks?
+	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 @loop	; Keep looping.
+@end:
+	lda #'\n'	; Print a newline.
+	jsr print_char	;
+	and #0		; Reset A.
+	rts		; End of viewmem.
+
+
+list:
+	nop		;
+@end:
+	rts		; End of list.
+asm:
+	nop		;
+@end:
+	rts		; End of asm.
+help:
+	nop		;
+@end:
+	rts		; End of help.
+inst:
+	nop		;
+@end:
+	rts		; End of inst.
+run:
+	nop		;
+@end:
+	rts		; End of run.
+set:
+	nop		;
+@end:
+	rts		; End of set.
+
+; Entry point for utility subroutines.
+lexer: