126 lines
3.5 KiB
C
126 lines
3.5 KiB
C
/* Copyright (c) 2005 Ian Piumarta
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* Copyright (c) 2014 Steven Flintham
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*
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the 'Software'),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, provided that the above copyright notice(s) and this
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* permission notice appear in all copies of the Software and that both the
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* above copyright notice(s) and this permission notice appear in supporting
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* documentation.
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*
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* THE SOFTWARE IS PROVIDED 'AS IS'. USE ENTIRELY AT YOUR OWN RISK.
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*/
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#include <setjmp.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "lib6502.h"
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#include "test-utils.h"
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static jmp_buf env;
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int done(M6502 *mpu, uint16_t address, uint8_t data)
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{
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char buffer[64];
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M6502_dump_masked(mpu, buffer);
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printf("\nBRK instruction: address %04X opcode %02X\n%s\n", address, data, buffer);
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longjmp(env, 1);
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exit(0);
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}
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int call(M6502 *mpu, uint16_t address, uint8_t data)
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{
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char buffer[64];
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M6502_dump_masked(mpu, buffer);
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printf("\ncall: address %04X opcode %02X\n%s\n", address, data, buffer);
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mpu->registers->pc = address;
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longjmp(env, 2);
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return 0;
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}
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int ill(M6502 *mpu, uint16_t address, uint8_t data)
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{
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char buffer[64];
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M6502_dump_masked(mpu, buffer);
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printf("\nill: address %04X opcode %02X memory %02X\n%s\n", address, data, mpu->memory[address], buffer);
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longjmp(env, 3);
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return 0;
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}
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int main(int argc, char *argv[])
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{
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M6502 *mpu = M6502_new(0, 0, 0);
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parse_args(argc, argv, mpu);
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unsigned pc = 0x1000;
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/* Read and write callbacks don't provide the correct, up-to-date CPU state
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* in the M6502 object, so this trick is a non-starter with them.
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*/
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M6502_setCallback(mpu, call, 0, done);
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M6502_setCallback(mpu, call, 0x2000, call);
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M6502_setCallback(mpu, call, 0x3000, call);
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M6502_setCallback(mpu, call, 0x4000, call);
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M6502_setCallback(mpu, illegal_instruction, 0x13, ill );
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M6502_setCallback(mpu, illegal_instruction, 0x44, ill );
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M6502_setCallback(mpu, illegal_instruction, 0x5c, ill );
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# define gen1(X) (mpu->memory[pc++]= (uint8_t)(X))
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# define gen2(X,Y) gen1(X); gen1(Y)
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# define gen3(X,Y,Z) gen1(X); gen2(Y,Z)
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gen1(0x13 );
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gen1(0x44 );
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gen1(0x13 ); // not executed, 0x44 is a two-byte illegal instruction
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gen1(0x5C );
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gen1(0x13 ); // not executed, 0x5C is a two-byte illegal instruction
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gen1(0x13 ); // not executed, 0x5C is a two-byte illegal instruction
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gen3(0x20,0x00,0x20); // JSR &2000
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gen3(0xad,0x00,0x50); // LDA &5000
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gen2(0x00,0x00 ); // BRK
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pc = 0x2000;
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gen3(0x8d,0x00,0x50); // STA &5000
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gen3(0x4c,0x00,0x30); // JMP &3000
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pc = 0x3000;
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gen2(0xa9,0x00 ); // LDA #0
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gen3(0x8d,0x76,0x32); // STA &3276
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gen2(0xa9,0x40 ); // LDA #&40
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gen3(0x8d,0x77,0x32); // STA &3277
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gen3(0x6c,0x76,0x32); // JMP (&3276)
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pc = 0x4000;
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gen1(0x60 ); // RTS
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M6502_setVector(mpu, RST, 0x1000);
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M6502_reset(mpu);
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while (1)
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{
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volatile int result = setjmp(env);
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if (result == 0)
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{
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M6502_run(mpu);
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}
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else
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{
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printf("\nsetjmp() returned %d\n", result);
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if (result == 1)
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{
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break;
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}
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}
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}
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M6502_delete(mpu);
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return 0;
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}
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