mirror of
https://github.com/RevCurtisP/C02.git
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Created Assembler a02.c
This commit is contained in:
Curtis F Kaylor
parent
3a7224ce9a
commit
9478d41299
572
a02.c
Normal file
572
a02.c
Normal file
@ -0,0 +1,572 @@
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/* Simple 6502 Assembler *
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* for C02 Compiler *
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* Uses DASM Syntax but *
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* supports 65C02 Op Codes */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include "a02.h"
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#define DEBUG TRUE
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enum otypes {BINFIL, PRGFIL}; //Object File Types
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char objtyp; //Object File Type
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int orgadr; //Origin Address
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int curadr; //Current Address
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int lstadr; //List Address
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struct sym {int block; char name[MAXSYM]; int bytes, value;};
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struct sym symbol; //Current Symbol
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struct sym symtbl[MAXGLB]; //Global Symbol Table
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int symcnt; //Number of Global Labels
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int blknum; //Local Label Block Number (0 = Global)
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char label[MAXSTR]; //Assembly Line Label
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char mnmnc[MAXSTR]; //Opcode Mnemonic
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char oprnd[MAXSTR]; //Opcode Mnemonic
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char cmmnt[MAXSTR]; //Assembly Line Comment
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char mcode[MAXSTR]; //Generated Bytes
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char strng[MAXSTR]; //Parsed String
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unsigned char token, opmod; //OpCode Token, Modifier
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unsigned int amode; //Addressing Modes
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int zpage, opval; //ZeroPage Flag, Operand Value
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char hexadr[6]; //Current Address in Hexadecimal
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char bytstr[5]; //String Representation of Byte
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char inplin[MAXSTR]; //Input Buffer
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char *linptr; //Pointer into Input Buffer
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int lineno; //Input File Line Number
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int opridx; //Index into Operand
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int passno; //Assembler Pass Number (1 or 2)
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char prgnam[256]; //Assembler Path and Name (from Command Line)
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char inpnam[256]; //Input File Name
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char outnam[256]; //Output File Name
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char lstnam[256]; //List File Name
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FILE *inpfil; //Input File Pointer
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FILE *outfil; //Output File Pointer
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FILE *lstfil; //List File Pointer
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/* Print Error Message and Exit */
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void xerror(char* format, char *s) {
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if (lineno) fprintf(stderr, "%04d: ", lineno);
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fprintf(stderr, format, s);
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exit(EXIT_FAILURE);
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}
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/* Skip Character in Input Line *
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* Args: c - Character to Skip *
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* Updates: linptr */
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int skpchr(char c) {
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if (*linptr == c) {linptr++; return TRUE;}
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else return FALSE;
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}
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/* Skip Spaces in Input Line *
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* Updates: linptr */
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void skpspc(void) {
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while (*linptr && *linptr <= ' ') linptr++;
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}
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/* Parse Word from Input Line *
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* Args: skip - Skip Spaces Flag *
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* *word - Buffer for Word *
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* Updates: linptr *
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* Returns: Word Found (TRUE/FALSE) */
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int pword(int skip, char* word) {
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int wrdlen = 0;
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if (skip) skpspc();
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while (isalnum(*linptr)) {
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word[wrdlen++] = toupper(*linptr);
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linptr++;
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}
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word[wrdlen] = 0; //Terminate String
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if (wrdlen) return TRUE; else return FALSE;
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}
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struct sym *fndsym(int block, char* name) {
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for (int i=0; i < symcnt; i++) {
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if (symtbl[i].block != block || strcmp(symtbl[i].name,name)) continue;
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return &symtbl[i];
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}
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return NULL;
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}
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/* Set Symbol Value and Size */
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void setsym(int value, int bytes) {
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if (DEBUG) printf("Setting Symbol %s to %d\n", symbol.name, value);
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symbol.value = value;
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if (bytes) symbol.bytes = bytes;
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else symbol.bytes = (value > 0xFF) ? 2 : 1;
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}
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/* Parse Label from Input Line
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* Sets: label
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* Updates: linptr
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* Returns: Label Found (TRUE/FALSE) */
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int plabel(void) {
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if (DEBUG) puts("Parsing Label");
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int block = (skpchr('.')) ? blknum : 0; //Local Label Block Number
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int found = pword(FALSE, label); //Parse Word without Skipping Spaces
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if (DEBUG) {
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if (found) printf("Found Label %s\n", label);
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else puts("No Label Found");
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}
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skpchr(':'); //Skip Optional Label Terminator
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if (found && passno == 1) {
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if (label[0] && fndsym(block, label)) xerror("Duplicate Label %s Encountered\n", label);
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if (DEBUG) printf("Initializing Symbol %s\n", label);
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symbol.block = block;
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strcpy(symbol.name, label);
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setsym(curadr, 0);
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}
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if (block) {
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for (int i=strlen(label)+1; i; i--) label[i] = label[i-1];
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label[0] = '.';
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}
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return found;
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}
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/* Copy Character to Operand and Increment */
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int cpychr(int c) {
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if (c && toupper(*linptr) != c) return FALSE;
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oprnd[opridx++] = toupper(*linptr++);
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return TRUE;
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}
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/* Evaluate Binary Number */
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int evlbin() {
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int result = 0;
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cpychr('%');
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while (isdigit(*linptr)) {
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if (*linptr > '1') break;
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result = (result << 1) + *linptr - '0';
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cpychr(0);
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}
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return result;
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}
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/* Evaluate Binary Number */
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int evlchr() {
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int result = 0;
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cpychr('\'');
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result = *linptr;
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cpychr(0);
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cpychr('\'');
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return result;
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}
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/* Evaluate Decimal Number */
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int evldec() {
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int result = 0;
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while (isdigit(*linptr)) {
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result = result * 10 + *linptr - '0';
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cpychr(0);
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}
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return result;
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}
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/* Evaluate Hexadecimal Number */
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int evlhex() {
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int result = 0;
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cpychr('$');
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while (isxdigit(*linptr)) {
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int digit = *linptr - '0';
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if (digit > 9) digit = digit - 7;
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result = (result << 4) + digit;
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cpychr(0);
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}
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return result;
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}
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/* Evaluate Symbol */
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struct sym *evlsym() {
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char name[MAXSTR];
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int block = (cpychr('.')) ? blknum : 0;
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pword(TRUE, name);
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for (int i=0; name[i]; i++) oprnd[opridx++] = name[i];
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struct sym *result = fndsym(block, name);
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if (passno == 2 && result == NULL) xerror("Undefined Symbol %s\n", name);
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return result;
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}
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/* Evaluate Term in Operand */
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int evltrm() {
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int result;
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skpspc();
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if (isalpha(*linptr) || *linptr == '.') {
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struct sym *target = evlsym();
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result = (target) ? target->value : 0x100;
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}
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else if (isdigit(*linptr))
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result = evldec();
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else switch(*linptr) {
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case '$': result = evlhex(); break;
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case '%': result = evlbin(); break;
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case '\'': result = evlchr(); break;
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default: result = -1;
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}
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skpspc();
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if (DEBUG) printf("Term Evaluated to %d\n", result);
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return result;
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}
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/* Evaluate Operand */
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int evlopd(int maxsiz) {
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int result = 0;
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int hilo = 0; //Return LSB (1) or MSB (2)
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int prns; //Optional Parenthesis after Hi/Low Operator
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if (DEBUG) puts("Evaluating Operand");
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skpspc();
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if (cpychr('<')) hilo = 1;
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else if (cpychr('>')) hilo = 2;
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if (hilo) prns = cpychr('(');
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result = evltrm();
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if (result >= 0)
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while (cpychr('+')) {
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int opdval = evltrm();
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if (opdval < 0) break;
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result += opdval;
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}
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if (hilo) {
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if (result < 0) xerror("Hi/Low Operator Requires Operand", "");
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if (prns) cpychr(')'); //
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switch (hilo) {
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case 1: result = result & 0xFF; break; //LSB
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case 2: result = result >> 8; break; //MSB
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}
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}
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if (DEBUG) printf("Operand Evaluated to %d\n", result);
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if (result > maxsiz) xerror("Operand Value too Large\n", "");
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return result;
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}
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/* Write Byte to Output File */
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void outbyt(int b) {
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if (curadr > -1) curadr++;
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if (passno != 2) return;
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fputc(b & 0xFF, outfil);
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sprintf(bytstr, "%02X ", b);
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strcat(mcode, bytstr);
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}
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/* Write Word to Output File */
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void outwrd(int w) {
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outbyt(w & 0xff);
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outbyt(w >> 8);
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}
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/* Assemble BYTE Pseudo-Op */
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void asmbyt(void) {
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do {
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if (cpychr('"')) { //String Operand
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while (!cpychr('"')) {outbyt(*linptr); cpychr(0); }
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skpspc();
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} else
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outbyt(evlopd(0xFF)); //Evaluate Operand
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} while (cpychr(','));
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}
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/* Assemble WORD Pseudo-Op */
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void asmwrd(void) {
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do {
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outwrd(evlopd(0xFFFF)); //Evaluate Operand
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} while (cpychr(','));
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}
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/* Assemble EQU Pseudo-Op */
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void asmequ(void) {
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if (label[0] == 0) xerror("EQUate without Label", 0);
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setsym(evlopd(0xFFFF), 0);
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}
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/* Assemble ORG Pseudo-Op */
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void asmorg(void) {
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orgadr = evlopd(0xFFFF);
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curadr = orgadr;
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lstadr = orgadr;
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if (passno == 1 && symbol.name[0]) {
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symbol.value = orgadr;
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symbol.bytes = 2;
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}
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if (passno == 2 && objtyp == PRGFIL)
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outwrd(orgadr);
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}
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/* Assemble PROCESSOR Pseudo-Op */
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void asmprc(void) {
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skpspc();
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while (isalnum(*linptr)) cpychr(0);
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if (DEBUG) printf("Ignoring Operand %s\n", oprnd);
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}
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/* Assemble SUBROUTINE Pseudo-Op */
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void asmsub(void) {
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blknum++;
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sprintf(oprnd, "%d", blknum); opridx = strlen(oprnd);
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if (DEBUG) printf("Block Number set to %s\n", oprnd);
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}
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/* Assemble FILL Pseudo-Op */
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void asmfll(void) {
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int size = evlopd(0xFFFF);
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for (int i=0; i<size; i++) {
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if (passno == 2) outbyt(0);
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curadr++;
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}
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}
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/* Assemble Pseudo-Op */
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int asmpso(void) {
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if (DEBUG) printf("Assembling Pseudo-Op Token '%c'\n", token);
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switch (token) {
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case '=': asmequ(); break; //EQU
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case 'B': asmbyt(); break; //BYTE
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case 'W': asmwrd(); break; //WORD
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case 'F': asmfll(); break; //FILL
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case 'S': asmsub(); break; //SUBROUTINE
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case '*': asmorg(); break; //ORG
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case 'P': asmprc(); break; //PROCESSOR
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default: xerror("Undefined Pseudo-Op %s\n", mnmnc);
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}
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return TRUE;
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}
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/* Lookup Opcode */
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int lkpopc(struct opc opclst[]) {
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if (DEBUG) printf("Looking for OpCode %s\n", mnmnc);
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char mne[4]; strncpy(mne, mnmnc, 3); //Truncate Mnemonic to Three Characters
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for (int i=0; opclst[i].name[0]; i++) {
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if (strcmp(opclst[i].name, mne)) continue;
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token = opclst[i].token;
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amode = opclst[i].amode;
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if (DEBUG) printf("Found token %02X, amode %04X\n", token, amode);
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return TRUE;
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}
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return FALSE;
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}
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/* Check for Valid Addressing Mode */
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int chkmod(int mode) {
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if (mode & amode) return TRUE;
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xerror("Invalid Addressing Mode", "");
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}
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/* Assemble Branch Opcode */
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void asmbrn(void) {
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int offset = 0;
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if (DEBUG) printf("Assembling Branch Opcode Token 0x%02X\n", token);
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zpage = TRUE;
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if (isalpha(*linptr) || *linptr =='.') {
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struct sym *target = evlsym();
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if (target) offset = (target->value - curadr - 2);
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}
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else if (cpychr('+')) offset = evlopd(0xFF);
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else if (cpychr('-')) offset = -evlopd(0xFF);
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else xerror("Illegal Branch Operand\n", "");
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if ((offset > 127 || offset < -128) && passno == 2)
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xerror("Branch Out of Range\n", "");
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if (DEBUG) printf("Branch Offset %d\n", offset);
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opval = offset & 0xFF;
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}
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/* Assemble Immediate Mode Instruction */
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void asmimd(void) {
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opval = evlopd(0xFF);
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zpage = TRUE;
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opmod = 0x08; //Immediate
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}
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/* Assemble Indirect Mode Instruction */
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void asmind(void) {
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if (DEBUG) puts("Assembling Indirect Mode Instruction");
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zpage = TRUE; opval = evlopd(0xFFFF);
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if (cpychr(',') && cpychr('X') && chkmod(INDCX)) cpychr(')'); ////(Indirect,X) opmod=0
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else if (cpychr(')')) {
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if (cpychr(',') && cpychr('Y') && chkmod(INDCY)) opmod = 0x10; //(Indirect),Y
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else if (chkmod(INDCT)) opmod = 0x11; //(Indirect)
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if (token == 0x4C) zpage = FALSE; //JMP (Indirect Absolute)
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}
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else chkmod(0); //Illegal Addressing Mode
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if (zpage && opval > 0x00FF) xerror("Operand Value too Large\n", "");
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}
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/* Assemble Implied/Accumulator/Absolute/ZeroPage Mode Instruction */
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void asmiaz(void) {
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opval = evlopd(0xFFFF);
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if (opval < 0) {
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if (amode != IMPLD) //Implied
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if (chkmod(ACMLT)) opmod = 0x08; //Accumulator
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return;
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}
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zpage = (opval <= 0xff) ? TRUE : FALSE;
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if (zpage && chkmod(ZPAGE)) opmod = 0x04; //ZeroPage
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else if (chkmod(ABSLT)) opmod = 0x0C; //Absolute
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if (cpychr(',')) {
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if (cpychr('X')) {
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if (zpage && chkmod(ZPAGX)) opmod = 0x14; //ZeroPage,X
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else if (chkmod(ABSLX)) opmod = 0x1C; //Absolute,X
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} else if (cpychr('Y')) {
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if (zpage && (token == 0x82 || token == 0xA2))
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opmod = 0x14; //ZeroPage,Y
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else {zpage = FALSE; opmod = 0x18;} //Absolute,Y
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} else chkmod(0); //Illegal Addressing Mode
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}
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}
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/* Fix Opcode (if needed) */
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unsigned char fixopc(void) {
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if (DEBUG) printf("Fixing OpCode $%02X+$%02X\n", token, opmod);
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for (int i=0; opfix[i].token; i++)
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if (opfix[i].token == token && opfix[i].opmod == opmod)
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return opfix[i].opcode;
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return token + opmod;
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}
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/* Assemble Opcode */
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int asmopc(void) {
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opmod = 0;
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if (lkpopc(opclst) == FALSE) xerror("Invalid Mnemonic %s\n", mnmnc);
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if (DEBUG) printf("Assembling Opcode Token 0x%02X\n", token);
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if (DEBUG) printf("Addressing Mode Mask 0x%04X\n", amode);
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skpspc();
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if (amode == 0) return asmpso(); //Pseudo-Op
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else if (amode == RELTV) asmbrn(); //Branch (Relative) Instruction
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else if (cpychr('#')) asmimd(); //Assemble Implied Instruction
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else if (cpychr('(')) asmind(); //Assemble Indirect Instruction
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else asmiaz(); //Assemble Implied/Accumulator/Absolute/ZeroPage Instruction
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int opcode = fixopc();
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if (DEBUG) printf("Writing OpCode $%02X\n", opcode);
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outbyt(opcode);
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if (opval >= 0) {
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if (zpage) outbyt(opval); //Byte Operand
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else outwrd(opval); //Word Operand
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}
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return TRUE;
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}
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/* Parse Opcode Mnemonic from Input Line
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* Sets: mnmnc
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* Updates: linptr
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* Returns: Label Found (TRUE/FALSE) */
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int pmnmnc(void) {
|
||||
if (DEBUG) puts("Parsing Mnemonic");
|
||||
int found = pword(TRUE, mnmnc);
|
||||
opridx = 0; //Initialize Operand Index
|
||||
if (found) asmopc();
|
||||
oprnd[opridx] = 0; //Terminate Operand String
|
||||
return found;
|
||||
}
|
||||
|
||||
/* Parse Comment from Input Line
|
||||
* Sets: cmmnt
|
||||
* Updates: linptr */
|
||||
void pcmmnt(void) {
|
||||
skpspc();
|
||||
int i = 0;
|
||||
while (*linptr >= ' ') cmmnt[i++] = *linptr++;
|
||||
cmmnt[i] = 0; //Terminate Comment
|
||||
if (DEBUG) {if (i) printf("Comment: %s\n"); else puts("No Comment Found");}
|
||||
}
|
||||
|
||||
/* Add Label to Symbol Table */
|
||||
void addsym() {
|
||||
if (symbol.value<0) xerror("Origin Not Set", "");
|
||||
memcpy(&symtbl[symcnt++], &symbol, sizeof(symbol));
|
||||
}
|
||||
|
||||
/* Assemble Input File (Two Pass) *
|
||||
* Args: pass - Assembly Pass (1 or 2) *
|
||||
* Requires: inpfil - Input File Pointer *
|
||||
* Uses: inplin - Input Line Buffer *
|
||||
* lineno - Input File Line Number */
|
||||
void asmfil(int pass) {
|
||||
passno = pass; //Assembly Pass Number
|
||||
if (DEBUG) printf("Assembling Pass %d\n", pass);
|
||||
lineno = 1; //Initialize Input File Line Number
|
||||
blknum = 1; //Initialize Local Block Number
|
||||
orgadr = -1; //Origin Address Not Set
|
||||
curadr = orgadr; //Set Current Address to Origin
|
||||
rewind(inpfil); //Start at Beginning of Input File
|
||||
while (!feof(inpfil)) {
|
||||
linptr = fgets(inplin, MAXSTR, inpfil);
|
||||
if (linptr == NULL) break;
|
||||
if (DEBUG) printf("%05d %04X: %s", lineno, curadr, inplin);
|
||||
lstadr = curadr; //Set List Address
|
||||
mcode[0] = 0; //Clear Generated Macbine Code
|
||||
plabel(); //Parse Label
|
||||
pmnmnc(); //Parse Mnemonic
|
||||
pcmmnt(); //Parse Comment
|
||||
if (passno == 1 && label[0]) addsym(); //Add Label to Table
|
||||
if (passno == 2) {
|
||||
if (lstadr < 0) hexadr[0] = 0; else sprintf(hexadr, "%04X", lstadr);
|
||||
fprintf(lstfil, "%05d %-4s %-9s%-7s %-5s %-16s %s\n", lineno, hexadr, mcode, label, mnmnc, oprnd, cmmnt );
|
||||
}
|
||||
lineno++;
|
||||
}
|
||||
}
|
||||
|
||||
/* Print Symbol Table */
|
||||
void prtsym(void) {
|
||||
fprintf(lstfil, "\n%s Symbol Table\nBlock Name Size Value\n", "Global");
|
||||
for (int i=0; i<symcnt; i++) {
|
||||
fprintf(lstfil, "%5d %-8s %4d %5d\n", symtbl[i].block, symtbl[i].name, symtbl[i].bytes, symtbl[i].value);
|
||||
}
|
||||
}
|
||||
|
||||
/* Parse Command Line Option */
|
||||
int pcoptn(char *argval) {
|
||||
if (argval[0] != '-') return FALSE;
|
||||
char option = toupper(argval[1]);
|
||||
if (DEBUG) printf(" Option '%c'\n", option);
|
||||
switch(option) {
|
||||
case 'P': objtyp = PRGFIL; break; //Commodore PRG File
|
||||
default: xerror("Illegal Command Line Option %s\n", argval);
|
||||
}
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
/* Parse Command Line Arguments */
|
||||
void pcargs(int argc, char *argv[]) {
|
||||
int argnum = 0;
|
||||
for (int arg = 0; arg<argc; arg++) {
|
||||
if (DEBUG) printf("Arg %d='%s'\n", arg, argv[arg]);
|
||||
if (arg == 0) {strcpy(prgnam, argv[arg]); continue;}
|
||||
if (pcoptn(argv[arg])) continue;
|
||||
switch (argnum++) {
|
||||
case 0: strcpy(inpnam, argv[arg]); break;
|
||||
case 1: strcpy(outnam, argv[arg]); break;
|
||||
case 2: strcpy(lstnam, argv[arg]); break;
|
||||
default: xerror("Too Many Arguments\n", "");
|
||||
}
|
||||
}
|
||||
///if (argnum<2) usage();
|
||||
}
|
||||
|
||||
/* Open File with Error Checking */
|
||||
FILE * opnfil(char* name, char* mode) {
|
||||
if (DEBUG) printf("Opening file '%s' with mode '%s'\n", name, mode);
|
||||
FILE *fp = fopen(name, mode);
|
||||
if (!fp) xerror("Error Opening File '%s'\n", name);
|
||||
return fp;
|
||||
}
|
||||
|
||||
int main(int argc, char *argv[]) {
|
||||
lstnam[0] = 0; lstfil = NULL; //Default to No List File
|
||||
lineno = 0; //No Line Number (yet)
|
||||
objtyp = BINFIL; //Default Object File Type to Binary
|
||||
pcargs(argc, argv); //Parse Command Line Arguments
|
||||
inpfil = opnfil(inpnam, "r"); //Open Input File
|
||||
outfil = opnfil(outnam, "wb"); //Open Output File
|
||||
if (lstnam[0]) //If List File Name Specified
|
||||
lstfil = opnfil(lstnam, "w"); // Open List File
|
||||
asmfil(1); //Assemble Input File (First Pass)
|
||||
asmfil(2); //Assemble Input File (First Pass)
|
||||
if (lstfil) prtsym(); //Print Symbol Table
|
||||
}
|
||||
|
||||
124
a02.h
Normal file
124
a02.h
Normal file
@ -0,0 +1,124 @@
|
||||
/* Definitions for A02 Assembler */
|
||||
|
||||
#define MAXSTR 128 //Maximum String Length
|
||||
#define MAXSYM 8 //Maximum Symbol Length
|
||||
#define MAXGLB 1024 //Maximum Number of Global Labels
|
||||
|
||||
#define FALSE 0
|
||||
#define TRUE -1
|
||||
|
||||
/* Address Mode Bit Masks */
|
||||
#define ACMLT 0x0001 //Accumulator [$xA]
|
||||
#define IMMDT 0x0002 //*Immediate [w/Acc]
|
||||
#define ZPAGE 0x0004 //Zero Page
|
||||
#define ZPAGX 0x0008 //*Zero Page,X
|
||||
//#define ZPAGY 0x0010 //*Zero Page,Y [By OpCodes]
|
||||
#define ABSLT 0x0020 //Absolute
|
||||
#define ABSLX 0x0040 //*Absolute,X [fixops()]
|
||||
#define ABSLY 0x0080 //Absolute,Y
|
||||
#define IMPLD 0x0100 //*Implied [x0001]
|
||||
#define INDCT 0x0200 //(Indirect)
|
||||
#define INDCX 0x0400 //(Indirect,X)
|
||||
#define INDCY 0x0800 //(Indirect),Y
|
||||
#define RELTV 0x1000 //Relative
|
||||
|
||||
struct opc {char name[4], token; int amode;};
|
||||
|
||||
struct opc opclst[] = {
|
||||
{"EQU", '=', 0},
|
||||
{"BYT", 'B', 0},
|
||||
{"WOR", 'W', 0},
|
||||
{"FIL", 'F', 0},
|
||||
{"SUB", 'S', 0},
|
||||
{"ORG", '*', 0},
|
||||
{"PRO", 'P', 0},
|
||||
{"BRK", 0x00, 0x0100},
|
||||
{"CLC", 0x18, 0x0100},
|
||||
{"CLD", 0xD8, 0x0100},
|
||||
{"CLI", 0x58, 0x0100},
|
||||
{"CLV", 0xB8, 0x0100},
|
||||
{"DEX", 0xCA, 0x0100},
|
||||
{"DEY", 0x88, 0x0100},
|
||||
{"INX", 0xE8, 0x0100},
|
||||
{"INY", 0xC8, 0x0100},
|
||||
{"NOP", 0xEA, 0x0100},
|
||||
{"PHA", 0x48, 0x0100},
|
||||
{"PHP", 0x08, 0x0100},
|
||||
{"PHX", 0xDA, 0x0100},
|
||||
{"PHY", 0x5A, 0x0100},
|
||||
{"PLA", 0x68, 0x0100},
|
||||
{"PLP", 0x28, 0x0100},
|
||||
{"PLX", 0xFA, 0x0100},
|
||||
{"PLY", 0x7A, 0x0100},
|
||||
{"RTI", 0x40, 0x0100},
|
||||
{"RTS", 0x60, 0x0100},
|
||||
{"SEC", 0x38, 0x0100},
|
||||
{"SED", 0xF8, 0x0100},
|
||||
{"SEI", 0x78, 0x0100},
|
||||
{"STP", 0xDB, 0x0100},
|
||||
{"TAX", 0xAA, 0x0100},
|
||||
{"TAY", 0xA8, 0x0100},
|
||||
{"TSX", 0xBA, 0x0100},
|
||||
{"TXA", 0x8A, 0x0100},
|
||||
{"TXS", 0x9A, 0x0100},
|
||||
{"TYA", 0x98, 0x0100},
|
||||
{"WAI", 0xCB, 0x0100},
|
||||
{"ADC", 0x61, 0x0EFE},
|
||||
{"AND", 0x21, 0x0EFE},
|
||||
{"CMP", 0xC1, 0x0EFE},
|
||||
{"EOR", 0x41, 0x0EFE},
|
||||
{"LDA", 0xA1, 0x0EFE},
|
||||
{"ORA", 0x01, 0x0EFE},
|
||||
{"SBC", 0xE1, 0x0EFE},
|
||||
{"STA", 0x81, 0x0EFE},
|
||||
{"ASL", 0x02, 0x007D},
|
||||
{"DEC", 0xC2, 0x007D},
|
||||
{"INC", 0xE2, 0x007D},
|
||||
{"LSR", 0x42, 0x007D},
|
||||
{"ROL", 0x22, 0x007D},
|
||||
{"ROR", 0x62, 0x007D},
|
||||
{"BIT", 0x20, 0x006E},
|
||||
{"CPX", 0xE0, 0x0026},
|
||||
{"CPY", 0xC0, 0x0026},
|
||||
{"LDY", 0xA0, 0x006E},
|
||||
{"BIT", 0x20, 0x006C},
|
||||
{"STY", 0x80, 0x002C},
|
||||
{"STZ", 0x60, 0x006C},
|
||||
{"TRB", 0x10, 0x0024},
|
||||
{"TSB", 0x00, 0x0024},
|
||||
{"LDX", 0xA2, 0x00A6},
|
||||
{"STX", 0x82, 0x00A6},
|
||||
{"JMP", 0x4C, 0x0620},
|
||||
{"JSR", 0x14, 0x0020},
|
||||
{"BCC", 0x90, 0x1000},
|
||||
{"BCS", 0xB0, 0x1000},
|
||||
{"BEQ", 0xF0, 0x1000},
|
||||
{"BMI", 0x30, 0x1000},
|
||||
{"BNE", 0xD0, 0x1000},
|
||||
{"BPL", 0x10, 0x1000},
|
||||
{"BRA", 0x80, 0x1000},
|
||||
{"BVC", 0x50, 0x1000},
|
||||
{"BVS", 0x70, 0x1000},
|
||||
{"", 0, 0}
|
||||
};
|
||||
|
||||
struct opf {unsigned char token, opmod, opcode;};
|
||||
|
||||
struct opf opfix[] = {
|
||||
{0x20, 0x08, 0x89},
|
||||
{0xE0, 0x08, 0xE0},
|
||||
{0xC0, 0x08, 0xC0},
|
||||
{0xA0, 0x08, 0xA0},
|
||||
{0xA2, 0x08, 0xA2},
|
||||
{0xC2, 0x08, 0x3A},
|
||||
{0xE2, 0x08, 0x1A},
|
||||
{0x60, 0x0C, 0x9C},
|
||||
{0x60, 0x1C, 0x9E},
|
||||
{0xA2, 0x18, 0xBE},
|
||||
{0x82, 0x18, 0xBC},
|
||||
{0x4C, 0x0C, 0x4C},
|
||||
{0x4C, 0x11, 0x6C},
|
||||
{0x4C, 0x00, 0x7C},
|
||||
{0,0,0}
|
||||
};
|
||||
|
||||
Loading…
Reference in New Issue
Block a user