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#include"apple.h"
byte* ROM;
void AppleOn() {
Memory = calloc(MEMORY_SIZE, sizeof(byte));
ROM = calloc(256, sizeof(byte));
InitInstructionTable();
// Load ROM.
FILE *ROM_File = fopen ("rom.bin", "rb");
if (ROM_File == NULL) {
printf("\n\rROM does not exist.\n");
abort();
}
for (int i = 0; i < 256; i++) {
ROM[i] = fgetc(ROM_File);
printf("%x", ROM[i]);
}
}
void AppleReset(){
acc = 0; X = 0; Y = 0; P = 0; S = 0;
idata.cycles = 0; idata.length = 0; idata.add = 0; idata.value = 0;
PC = 0xFF00;
free(Memory);
Memory = calloc(MEMORY_SIZE, sizeof(byte));
}
/*byte ToAppleAscii(char x)
{
if (x < 0x20 || x >= 0x60)
return -1;
if (x >= 0x40)
x -= 0x40;
return x;
}
byte ToAscii(char x)
{
if (x < 0x20)
x += 0x40;
return x;
}*/
byte GetMemory(address x){
switch(x)
{
// The keyboard does not act precisely as the real hardware, because there is no need to wait for the keyboard.
// So KBD_CR and DSP always return a high high-order bit, and when the keyboard data is requested it will wait for UserInput() to finish.
case KBD:
return 0b10000000 | UserInput();
case KBD_CR: case DSP:
return 0b10000000;
}
if (x >= 0xFF00 && x <= 0xFFFF) {
return ROM[0x00FF & x];
}
}
void SetMemory(address x, byte y){
if (x < MEMORY_SIZE) {
Memory[x] = y;
}
}
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