#include "opcode.h"
#include <ctype.h>
#include <string.h>

#define MAX_TOK 0x1000
#define TXS_MNE_ID 78	/* Used for a special case in the assembler. */

typedef struct tok token ;
typedef struct ln  line  ;
typedef struct sym symbol;
typedef struct fix fixup ;

struct tok {
	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 ;
		uint32_t dword;
		uint64_t qword;
	};
};

struct ln {
	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.   */
	uint8_t stab;		/* Number of starting tabs.    */
	uint8_t sspace;		/* Number of starting spaces.  */
	uint8_t etab;		/* Number of ending tabs.      */
	uint8_t espace;		/* Number of ending spaces.    */
};



struct fix {
	fixup *next;
	symbol *s;
	token *t;
	uint64_t adr;
};

struct sym {
	symbol *next;
	symbol *local;
	uint16_t count;
	uint64_t val;
	uint8_t def;
	char *name;
	uint16_t id;
};

extern char lexeme[];
extern char *string[];
extern char *comment[];
extern uint16_t incl[];
extern line *lines;
extern line *last_line;
extern token *tokens;
extern token *last_tok;
extern symbol *symbols;
extern symbol *locals;
extern fixup *fixups;

extern uint8_t lex_type;

enum dir {
	DIR_ORG,
	DIR_BYTE,
	DIR_WORD,
	DIR_DWORD,
	DIR_QWORD,
	DIR_INCLUDE
};

enum token {
	TOK_DIR,
	TOK_LOCAL,
	TOK_LABEL,
	TOK_SYM,
	TOK_EXPR,
	TOK_CSV,
	TOK_STRING,
	TOK_CHAR,
	TOK_IND,
	TOK_IMM,
	TOK_OPCODE,
	TOK_RS,
	TOK_COMMENT,
	TOK_HEX,
	TOK_DEC,
	TOK_BIN,
	TOK_INCLUDE
};

enum pre_token {
	PTOK_DOT,
	PTOK_AT,
	PTOK_COLON,
	PTOK_EQU,
	PTOK_PLUS,
	PTOK_MINUS,
	PTOK_GT,
	PTOK_LT,
	PTOK_LBRACK,
	PTOK_RBRACK,
	PTOK_COMMA,
	PTOK_X,
	PTOK_Y,
	PTOK_DQUOTE,
	PTOK_SQUOTE,
	PTOK_HASH,
	PTOK_SCOLON,
	PTOK_DOLLAR,
	PTOK_PERCENT,
	PTOK_NUMBER,
	PTOK_ALPHA,
	PTOK_OTHER
};

enum expr {
	EXPR_PLUS,
	EXPR_MINUS,
	EXPR_LOW,
	EXPR_HIGH,
	EXPR_NONE
};

static const uint8_t opcodes[OPNUM][9] = {
	/*	 IMM	ZM   ZMX   ZMY	 IND  INDX  INDY   ABS	IMPL*/
	[ 0] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00},
	[ 1] = {0x01, 0x06, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x04, 0xFF},
	[ 2] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x02},
	[ 3] = {0x08, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
	[ 4] = {0x09, 0x2D, 0xFF, 0xFF, 0x55, 0xAD, 0xAC, 0x2C, 0xFF},
	[ 5] = {0x0A, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
	[ 6] = {0xFF, 0x0D, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x0C, 0xE5},
	[ 7] = {0xFF, 0x0E, 0xFF, 0xFF, 0xCE, 0xFF, 0xFF, 0x10, 0xFF},
	[ 8] = {0x11, 0x16, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x14, 0xFF},
	[ 9] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x12},
	[10] = {0x18, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
	[11] = {0x19, 0x3D, 0xFF, 0xFF, 0x85, 0xFF, 0xFF, 0x4C, 0xFF},
	[12] = {0x1A, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
	[13] = {0xFF, 0x1D, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x1C, 0xF5},
	[14] = {0xFF, 0x1E, 0xFF, 0xFF, 0xBE, 0xFF, 0xFF, 0x20, 0xFF},
	[15] = {0x21, 0x26, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x24, 0xFF},
	[16] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x22},
	[17] = {0x28, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
	[18] = {0x29, 0x4D, 0xFF, 0xFF, 0xB5, 0xFF, 0xFF, 0x3C, 0xFF},
	[19] = {0x2A, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
	[20] = {0xFF, 0x2E, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x30, 0xFF},
	[21] = {0x31, 0x36, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x34, 0xFF},
	[22] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x32},
	[23] = {0x38, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
	[24] = {0x3A, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
	[25] = {0xFF, 0x3E, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x40, 0xFF},
	[26] = {0x41, 0x46, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x44, 0xFF},
	[27] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x42},
	[28] = {0x48, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
	[29] = {0x4A, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
	[30] = {0xFF, 0x4E, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x50, 0xFF},
	[31] = {0x51, 0x56, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x54, 0xFF},
	[32] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x52},
	[33] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x58},
	[34] = {0x5A, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
	[35] = {0xFF, 0x5E, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x60, 0xFF},
	[36] = {0x61, 0x66, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x64, 0xFF},
	[37] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x62},
	[38] = {0x68, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
	[39] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x6A},
	[40] = {0xFF, 0x6E, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x70, 0xFF},
	[41] = {0x71, 0x76, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x74, 0xFF},
	[42] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x72},
	[43] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x78},
	[44] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x7A},
	[45] = {0xFF, 0x7E, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x80, 0xFF},
	[46] = {0x81, 0x86, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x84, 0xFF},
	[47] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x82},
	[48] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x88},
	[49] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x8A},
	[50] = {0xFF, 0x8E, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x90, 0xFF},
	[51] = {0x91, 0x96, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x94, 0xFF},
	[52] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x92},
	[53] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x98},
	[54] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x9A},
	[55] = {0xFF, 0x9E, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xA0, 0xFF},
	[56] = {0xA1, 0xA6, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xA4, 0xFF},
	[57] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xA2},
	[58] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xA8},
	[59] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xAA},
	[60] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xAE},
	[61] = {0xB1, 0xB6, 0xFF, 0xFF, 0x25, 0x7D, 0x7C, 0xB4, 0xFF},
	[62] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xB2},
	[63] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xB8},
	[64] = {0xB9, 0xBD, 0xFF, 0xC9, 0x95, 0xFF, 0xFF, 0xBC, 0xFF},
	[65] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xBA},
	[66] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC0},
	[67] = {0xC1, 0xC6, 0x79, 0x39, 0x05, 0x5D, 0x5C, 0xC4, 0xFF},
	[68] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC5},
	[69] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC8},
	[70] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xCA},
	[71] = {0xFF, 0xCD, 0x89, 0x49, 0x15, 0x6D, 0x6C, 0xCC, 0xFF},
	[72] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xD0},
	[73] = {0xD1, 0xD6, 0x99, 0x59, 0x35, 0x8D, 0x8C, 0xD4, 0xFF},
	[74] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xD5},
	[75] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xD8},
	[76] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xDA},
	[77] = {0xFF, 0xDD, 0xA9, 0x69, 0x45, 0x9D, 0x9C, 0xDC, 0xFF},
	[78] = {0xE0, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
	[79] = {0xE1, 0xE6, 0xE9, 0xFF, 0x65, 0xFF, 0xFF, 0xE4, 0xFF},
	[80] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xE8},
	[81] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xEA},
	[82] = {0xFF, 0xED, 0xF9, 0xFF, 0x75, 0xFF, 0xFF, 0xEC, 0xFF},
	[83] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xEE},
	[84] = {0xF1, 0xF6, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xF4, 0xFF},
	[85] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xF2},
	[86] = {0xFF, 0xFD, 0xFF, 0xD9, 0xA5, 0xFF, 0xFF, 0xFC, 0xFF},
	[87] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFE}
};

static const char *dir_t[6] = {
	[0] = "org",
	[1] = "byte",
	[2] = "word",
	[3] = "dword",
	[4] = "qword",
	[5] = "include"
};

static const char *rs_t[4] = {
	[0] = "",
	[1] = ".w",
	[2] = ".d",
	[3] = ".q"
};

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] = {
	[IMM ] = "IMM",
	[ZM  ] = "ZM",
	[ZMX ] = "ZMX",
	[ZMY ] = "ZMY",
	[IND ] = "IND",
	[INDX] = "INDX",
	[INDY] = "INDY",
	[ABS ] = "ABS",
	[IMPL] = "IMPL"
};

static const char *mne[OPNUM] = {
	[ 0] = "CPS",
	[ 1] = "ADC",
	[ 2] = "AAB",
	[ 3] = "PHP",
	[ 4] = "CPB",
	[ 5] = "PHB",
	[ 6] = "DEC",
	[ 7] = "JMP",
	[ 8] = "SBC",
	[ 9] = "SAB",
	[10] = "ENT",
	[11] = "CPY",
	[12] = "PLB",
	[13] = "INC",
	[14] = "JSR",
	[15] = "AND",
	[16] = "ABA",
	[17] = "PLP",
	[18] = "CPX",
	[19] = "PHY",
	[20] = "BPO",
	[21] = "ORA",
	[22] = "OAB",
	[23] = "STT",
	[24] = "PLY",
	[25] = "BNG",
	[26] = "XOR",
	[27] = "XAB",
	[28] = "PHA",
	[29] = "PHX",
	[30] = "BCS",
	[31] = "LSL",
	[32] = "LLB",
	[33] = "CLC",
	[34] = "PLX",
	[35] = "BCC",
	[36] = "LSR",
	[37] = "LRB",
	[38] = "PLA",
	[39] = "TAB",
	[40] = "BEQ",
	[41] = "ROL",
	[42] = "RLB",
	[43] = "SEC",
	[44] = "TBA",
	[45] = "BNE",
	[46] = "ROR",
	[47] = "RRB",
	[48] = "DEY",
	[49] = "TAY",
	[50] = "BVS",
	[51] = "MUL",
	[52] = "MAB",
	[53] = "CLI",
	[54] = "TYA",
	[55] = "BVC",
	[56] = "DIV",
	[57] = "DAB",
	[58] = "INY",
	[59] = "TAX",
	[60] = "RTS",
	[61] = "CMP",
	[62] = "CAB",
	[63] = "SEI",
	[64] = "LDX",
	[65] = "TXA",
	[66] = "RTI",
	[67] = "LDA",
	[68] = "DEX",
	[69] = "CLV",
	[70] = "TYX",
	[71] = "STA",
	[72] = "TSX",
	[73] = "LDB",
	[74] = "INX",
	[75] = "WAI",
	[76] = "TXY",
	[77] = "STB",
	[78] = "TXS",
	[79] = "LDY",
	[80] = "BRK",
	[81] = "NOP",
	[82] = "STY",
	[83] = "DEB",
	[84] = "ASR",
	[85] = "ARB",
	[86] = "STX",
	[87] = "INB"
};

static const char *instdesc[OPNUM] = {
	[ 0] = "Clears the Processor Status register.",
	[ 1] = "ADd accumulator, with operand, Carry if needed.",
	[ 2] = "Add Accumulator, with B, carry if needed.",
	[ 3] = "PusH the number of bytes specified, from the Processor status register to the stack.",
	[ 4] = "ComPare the B register, with operand.",
	[ 5] = "PusH the number of bytes specified, from the B register to the stack.",
	[ 6] = "DECrement accumulator, or memory.",
	[ 7] = "JuMP to the address specified.",
	[ 8] = "SuBtract accumulator, with operand, Carry if needed",
	[ 9] = "Subtract Accumulator, with B, carry if needed.",
	[10] = "ENd a Thread.",
	[11] = "ComPare the Y register, with operand.",
	[12] = "PuLl the number of bytes specified, from the stack, to the B register.",
	[13] = "INCrement accumulator, or memory.",
	[14] = "Jump to a SubRoutine.",
	[15] = "Bitwise AND accumulator, with operand.",
	[16] = "Bitwise AND Accumulator, with B.",
	[17] = "PuLl the number of bytes specified, from the stack, to the Processor status register.",
	[18] = "ComPare the X register, with operand.",
	[19] = "PusH the number of bytes specified, from the Y register to the stack.",
	[20] = "Branch if POsitive.",
	[21] = "Bitwise OR Accumulator, with operand.",
	[22] = "Bitwise OR Accumulator, with B.",
	[23] = "STart a Thread.",
	[24] = "PuLl the number of bytes specified, from the stack, to the Y register.",
	[25] = "Branch if NeGative.",
	[26] = "Bitwise XOR Accumulator, with operand.",
	[27] = "Bitwise XOR Accumulator, with B.",
	[28] = "PusH the number of bytes specified, from the Accumulator to the stack.",
	[29] = "PusH the number of bytes specified, from the X register to the stack.",
	[30] = "Branch if the Carry flag is Set.",
	[31] = "Logical Shift Left accumulator, with operand.",
	[32] = "Logical Shift Left accumulator, with B.",
	[33] = "CLear the Carry flag.",
	[34] = "PuLl the number of bytes specified, from the stack, to the X register.",
	[35] = "Branch if the Carry flag has been Cleared.",
	[36] = "Logical Shift Right accumulator, with operand.",
	[37] = "Logical Shift Right accumulator, with B.",
	[38] = "PuLl the number of bytes specified, from the stack, to the Accumulator.",
	[39] = "Transfer the value from the Accumulator, to the B register.",
	[40] = "Branch if EQual (the zero flag has been set).",
	[41] = "ROtate Left accumulator, with operand.",
	[42] = "Rotate Left accumulator, with B.",
	[43] = "SEt the Carry flag.",
	[44] = "Transfer the value from the Y register, to the Accumulator.",
	[45] = "Branch if Not Equal (the zero flag has been cleared)",
	[46] = "ROtate Right accumulator, with operand.",
	[47] = "Rotate Right accumulator, with B.",
	[48] = "DEcrement the Y register.",
	[49] = "Transfer the value from the Accumulator, to the Y register.",
	[50] = "Branch if the oVerflow flag is Set.",
	[51] = "MULtiply accumulator, with operand.",
	[52] = "Multiply Accumulator, with B.",
	[53] = "CLear the Interrupt flag.",
	[54] = "Transfer the value from the Y register, to the Accumulator.",
	[55] = "Branch if the oVerflow flag has been Cleared.",
	[56] = "DIVide accumulator, with operand, and put the remainder into the B register.",
	[57] = "Divide Accumulator, with B, and put the remainder into the X register.",
	[58] = "INcrement the Y register.",
	[59] = "Transfer the value from the Accumulator, to the X register.",
	[60] = "ReTurn from a Subroutine.",
	[61] = "CoMPare acumulator, with operand.",
	[62] = "Compare Accumulator, with B.",
	[63] = "SEt the Interrupt flag.",
	[64] = "LoaD the value from the operand, to the X register.",
	[65] = "Transfer the value from the X register, to the Accumulator.",
	[66] = "ReTurn from an Interrupt.",
	[67] = "LoaD the value from the operand, to the Accumulator.",
	[68] = "DEcrement the X register.",
	[69] = "CLear the oVerflow flag.",
	[70] = "Transfer the value from the Y register, to the X register.",
	[71] = "STore the value from the Accumulator, in memory.",
	[72] = "Transfer the value from the Stack pointer, to the X register.",
	[73] = "LoaD the value from the operand, to the B register.",
	[74] = "INcrement the X register.",
	[75] = "WAIt for an interrupt",
	[76] = "Transfer the value from the X register, to the Y register.",
	[77] = "STore the value from the B register, in memory.",
	[78] = "Transfer the value from the X register, to the Stack pointer.",
	[79] = "LoaD the value from the operand, to the Y register.",
	[80] = "BReaKpoint",
	[81] = "NO oPeration",
	[82] = "STore the value from the Y register, in memory.",
	[83] = "DEcrement the B register.",
	[84] = "Arithmetic Shift Right accumulator, with operand.",
	[85] = "Arithmetic shift Right accumulator, with B.",
	[86] = "STore the value from the X register, in memory.",
	[87] = "INcrement the B register."
};

static const uint8_t bitsize[4] = {
	[0] = 0x07,
	[1] = 0x0F,
	[2] = 0x1F,
	[3] = 0x3F
};

static const uint8_t amp[8] = {
	[0] = 0x00,
	[1] = 0x00,
	[2] = 0x07,
	[4] = 0x07,
	[5] = 0x0B,
	[6] = 0x0B,
	[3] = 0x0F,
	[7] = 0x0F
};


extern uint16_t linenum;
extern uint16_t lineidx;
extern uint16_t stridx;
extern uint16_t comidx;
extern uint16_t inc_file; /* Number of included files. */
extern uint16_t inc_count;

struct bc {
	uint64_t progsize;
	uint64_t datasize;
};

typedef struct bc bytecount;

extern uint8_t defined;
extern uint8_t isfixup;

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, symbol *sym);
extern void assemble(line *ln, bytecount *bc, uint8_t dbg);
extern void cleanup();