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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.
32 lines
1.5 KiB
C
32 lines
1.5 KiB
C
#include <stdio.h>
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#include "bus.h"
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#include "cpu.h"
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#include "loader.h"
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#include "opcode.h"
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int main(int argc,char **argv)
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{
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Bus6502 bus;CPU6502 cpu;size_t loaded;uint8_t previous=0;uint16_t history[32]={0};
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if(argc!=2){fprintf(stderr,"usage: %s 6502_interrupt_test.bin\n",argv[0]);return 2;}
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bus_init(&bus);
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if(load_binary(&bus,argv[1],0x000A,&loaded)){fprintf(stderr,"failed to load %s\n",argv[1]);return 1;}
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bus.memory.data[0xBFFC]=0;
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cpu.PC=0x0400;cpu.A=cpu.X=cpu.Y=0;cpu.SP=0xFD;cpu.P=FLAG_U|FLAG_I;
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cpu.nmi_pending=false;cpu.irq_asserted=false;
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for(unsigned long i=0;i<10000000;i++){
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uint16_t before=cpu.PC;history[i%32]=before;cpu_step_result_t r=cpu_step(&cpu,&bus);
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uint8_t feedback=bus.memory.data[0xBFFC]&3;
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cpu_set_irq(&cpu,(feedback&1)!=0);
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if((feedback&2)&&!(previous&2))cpu_request_nmi(&cpu);
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previous=feedback;
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if(r.status!=CPU_STEP_OK){fprintf(stderr,"illegal $%02X at $%04X\n",r.opcode,before);return 1;}
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if(cpu.PC==0x06F5){printf("interrupt success after %lu instructions (%zu-byte ROM)\n",i+1,loaded);return 0;}
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if(cpu.PC==before){
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fprintf(stderr,"interrupt trap at $%04X after %lu instructions\n",before,i+1);
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unsigned long first=i>31?i-31:0;
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for(unsigned long n=first;n<=i;n++){char text[48];uint16_t pc=history[n%32];cpu_disassemble(&bus,pc,text,sizeof text);fprintf(stderr," %04X %s\n",pc,text);}return 1;
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}
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}
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fprintf(stderr,"interrupt test limit reached at $%04X\n",cpu.PC);return 1;
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}
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