// ######## ## ## ######## ######
// ## ## ## ## ## ##
// ## ## ## ## ##
// ###### ### ###### ##
// ## ## ## ## ##
// ## ## ## ## ## ##
// ######## ## ## ######## ######
// cp value into mem[pc] and exec
int execute_cmd(struct _6510_cpu* cpu, char memory[][9], char* string){
int op, lb, hb;
int pc=pc2int(cpu);
sscanf(string, "x %2x %2x %2x", &op, &lb, &hb);
int2register(op, (char*)&(memory[pc]));
int2register(lb, (char*)&(memory[pc+1]));
int2register(hb, (char*)&memory[pc+2]);
fetch(cpu, memory);
exec(cpu, memory);
print_cpu_dis(cpu,memory);
return 1;
}
int registers_cmd(struct _6510_cpu* cpu, char memory[][9], char* string){
char regname[5] = "1234";
char buffer_reg[8+1] = "00000000";
int key, content=-1;
int i;
// mon> mem af 02 ; mam[af] <- 02
sscanf(string, " %*s %s %2x ", &(regname[0]), &content);
key = -1;
for(i=0;names[i]!=NULL;i++){
if(strcmp(regname,names[i])==0){
key=i;
break;
}
}
if(content!=-1){
int2register(content, buffer_reg);
switch(key)
{
case ACC:
cp_register(buffer_reg, cpu->rega);
break;
case ABRL:
cp_register(buffer_reg, cpu->abrl);
break;
case ABRH:
cp_register(buffer_reg, cpu->abrh);
break;
case DBR:
cp_register(buffer_reg, cpu->dbr);
break;
case IDX:
cp_register(buffer_reg, cpu->regx);
break;
case IDY:
cp_register(buffer_reg, cpu->regy);
break;
case PCL:
cp_register(buffer_reg, cpu->pcl);
break;
case PCH:
cp_register(buffer_reg, cpu->pch);
break;
case IR:
cp_register(buffer_reg, cpu->ir);
break;
case SP:
cp_register(buffer_reg, cpu->sp);
break;
default:
break;
}
}
print_cpu(cpu);
return 1;
}
int go_cmd(struct _6510_cpu* cpu, char memory[][9], char* string){
int adr = -1;
sscanf(string, "%*s %4x ", &adr);
printf("%s %4x ", string, adr);
if(adr>MEMORY_SIZE || adr < 0){
adr = 0;
}
int2register(adr & 0xff, cpu->pcl);
int2register((adr>>8) & 0xff, cpu->pch);
return 1;
}
int memory_cmd(struct _6510_cpu* cpu, char memory[][9], char* string){
int adr=-1;
int content=-1;
char reg[8+1];
sscanf(string, "%*s %4x %2x ", &adr, &content);
if(adr>MEMORY_SIZE || adr < 0){
adr = 0;
}
if(content!=-1){
int2register(content,reg);
cp_register(reg, memory[adr]);
}
print_memory_page0(memory, adr);
return 1;
}
//
// write random into mem[0xfe]
// used in www.6502asm.com simulation
//
void rnd_update(){
if(randomptr){
int2register(rand() % 0x100,randomptr);
}
}
//
// write random into mem[0xfe]
// visual tutorial example screen
//
void rnd_update(struct _6510_cpu* cpu, struct _vic* vic, char memory[][9]){
int r = rand() % 0x100;
int2register(r,memory[0x00fe]);
}
