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https://github.com/andwati/mos-6502.git
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andwati
0dcd2ed687
- Added `state.c` to handle saving and loading the state of the CPU and Bus. - Implemented CRC32 checksum for data integrity verification during state operations. - Enhanced `README.md` in tests/roms to document new test commands for decimal, interrupt, Apple I, and nestest. - Created new test files: `run_apple1.c`, `run_decimal.c`, `run_interrupt.c`, `run_nestest.c`, and `run_vectors.c` to validate the new features. - Updated `run_tests.c` to include tests for state saving/loading and other functionalities. - Introduced `test_vectors.py` to facilitate downloading and running JSON test vectors for opcode verification.
31 lines
1.7 KiB
C
31 lines
1.7 KiB
C
#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include "bus.h"
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#include "cpu.h"
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static int byte(void){return fgetc(stdin);}
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static int word(uint16_t *v){int a=byte(),b=byte();if(a==EOF||b==EOF)return 0;*v=(uint16_t)(a|(b<<8));return 1;}
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static int regs(CPU6502 *c)
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{
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int s,a,x,y,p;if(!word(&c->PC))return 0;s=byte();a=byte();x=byte();y=byte();p=byte();if(p==EOF)return 0;
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c->SP=(uint8_t)s;c->A=(uint8_t)a;c->X=(uint8_t)x;c->Y=(uint8_t)y;c->P=(uint8_t)p;c->decimal_enabled=true;return 1;
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}
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static int pairs(Bus6502 *b,uint16_t *addresses,uint8_t *values)
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{
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uint16_t count;if(!word(&count))return -1;for(uint16_t i=0;i<count;i++){uint16_t a;int v;if(!word(&a)||(v=byte())==EOF)return -1;if(b)b->memory.data[a]=(uint8_t)v;if(addresses){addresses[i]=a;values[i]=(uint8_t)v;}}return count;
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}
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int main(void)
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{
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unsigned long tests=0;int failures=0;
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for(;;){CPU6502 c,want;Bus6502 b;uint16_t addresses[64];uint8_t values[64];int count,cycles;
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bus_init(&b);memset(&c,0,sizeof c);memset(&want,0,sizeof want);if(!regs(&c))break;
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if(pairs(&b,NULL,NULL)<0||!regs(&want)||(count=pairs(NULL,addresses,values))<0||(cycles=byte())==EOF)return 2;
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cpu_step_result_t r=cpu_step(&c,&b);tests++;
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int bad=r.status!=CPU_STEP_OK||r.cycles!=(uint8_t)cycles||c.PC!=want.PC||c.SP!=want.SP||c.A!=want.A||c.X!=want.X||c.Y!=want.Y||c.P!=want.P;
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for(int i=0;i<count;i++)if(b.memory.data[addresses[i]]!=values[i])bad=1;
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if(bad&&failures++<20)fprintf(stderr,"vector %lu failed: got PC=%04X S=%02X A=%02X X=%02X Y=%02X P=%02X C=%u\n",tests,c.PC,c.SP,c.A,c.X,c.Y,c.P,r.cycles);
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}
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printf("%lu single-step vectors, %d failures\n",tests,failures);return failures?1:0;
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}
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