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// interpreter.c
// Useful for carrying out tests of the CPU instructions.
// Refer to interpreter.md for the manual
#include"headers/include.h"
#include"headers/debug.h"
//Write a custom getc function here which ignores spaces
int main(int argc, char *argv[]){
AppleOn();
byte c;
// Interpreter loop
while(1){
// Retrieve first character of a line
do {
c = getc(stdin);
} while (c == '\n' || c == ' ' || c == '\t');
// The following are special debug commands.
// Quit program
if (c == 'Q' || c == 'q'){
break;
}
if (c == 'R' || c == 'r'){
AppleReset(); //need to flesh out this function
continue;
}
// Dump processor status
if (c == 'P' || c == 'p'){
dStatusDump();
continue;
}
// FIXME!!! PAGE IS CLAMPED TO 00 ON THE LONG MODE
// Dump a page of memory
if (c == 'M' || c == 'm'){
address x = 0;
do {
c = getc(stdin);
} while(c == ' ' || c == '\n');
x = dCharToNum(c) << 4;
x += dCharToNum(getc(stdin));
c = getc(stdin);
if (c != '\n'){
x <<= 8;
x += dCharToNum(c) << 4;
x += dCharToNum(getc(stdin));
printf("@%04x:%02x\n", x, Memory[x]);
}
else{
printf("Page %02x", x);
dPageDump(x);
}
continue;
}
// Print out a statement
if (c == '/'){
do {
c = getc(stdin);
printf("%c", c);
} while(c != '\n');
continue;
}
// Comment, so ignores until newline.
if (c == '#'){
do {
c = getc(stdin);
} while(c != '\n');
continue;
}
if (c == 'S' || c == 's'){
address x = 0;
byte y = 0;
for(int i = 3; i >= 0; i--){
x += (dCharToNum(getc(stdin)) << (4*i));
}
c = getc(stdin);
if (c != '.'){
printf("Error assigning memory to 0x%x\n", x);
break;
}
for(int i = 1; i >= 0; i--){
y += (dCharToNum(getc(stdin)) << (4*i));
}
Memory[x] = y;
continue;
}
// From here on it is expected input will be an instruction
c = dCharToNum(c) << 4;
c += dCharToNum(getc(stdin));
address x = 0x0000;
char z;
for(int i = ((fAddressGetLengthPrempt(c) * 2) - 2); i > 0; i--) {
do {
z = getc(stdin);
} while (z == ' ' || z == '\t');
//if (z != '\n'){
x += dCharToNum(z) << ((4 * (i - 1)));
/*}else{
i++;
}*/
}
callInstructionTable(c, x);
}
}
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