void
nes_defchr(int *ip)
{
unsigned char buffer[16];
unsigned int data[8];
int size;
int i;
/* define label */
labldef(loccnt, 1);
/* output infos */
data_loccnt = loccnt;
data_size = 3;
data_level = 3;
/* get tile data */
for (i = 0; i < 8; i++) {
/* get value */
if (!evaluate(ip, (i < 7) ? ',' : ';'))
return;
/* store value */
data[i] = value;
}
/* encode tile */
size = nes_pack_8x8_tile(buffer, data, 0, PACKED_TILE);
/* store tile */
putbuffer(buffer, size);
/* output line */
if (pass == LAST_PASS)
println();
}
void
do_call(int *ip)
{
struct t_proc *ptr;
int value;
/* define label */
labldef(loccnt, 1);
/* update location counter */
data_loccnt = loccnt;
loccnt += 3;
/* generate code */
if (pass == LAST_PASS) {
/* skip spaces */
while (isspace(prlnbuf[*ip]))
(*ip)++;
/* extract name */
if (!colsym(ip)) {
if (symbol[0] == 0)
fatal_error("Syntax error!");
return;
}
/* check end of line */
check_eol(ip);
/* lookup proc table */
if((ptr = proc_look())) {
/* check banks */
if (bank == ptr->bank)
value = ptr->org + 0xA000;
else {
/* different */
if (ptr->call)
value = ptr->call;
else {
/* new call */
value = call_ptr + 0x8000;
ptr->call = value;
/* init */
if (call_ptr == 0) {
call_bank = ++max_bank;
}
/* install */
poke(call_ptr++, 0xA8); // tay
poke(call_ptr++, 0x43); // tma #5
poke(call_ptr++, 0x20);
poke(call_ptr++, 0x48); // pha
poke(call_ptr++, 0xA9); // lda #...
poke(call_ptr++, ptr->bank+bank_base);
poke(call_ptr++, 0x53); // tam #5
poke(call_ptr++, 0x20);
poke(call_ptr++, 0x98); // tya
poke(call_ptr++, 0x20); // jsr ...
poke(call_ptr++, (ptr->org & 0xFF));
poke(call_ptr++, (ptr->org >> 8) + 0xA0);
poke(call_ptr++, 0xA8); // tay
poke(call_ptr++, 0x68); // pla
poke(call_ptr++, 0x53); // tam #5
poke(call_ptr++, 0x20);
poke(call_ptr++, 0x98); // tya
poke(call_ptr++, 0x60); // rts
}
}
}
else {
/* lookup symbol table */
if ((lablptr = stlook(0)) == NULL) {
fatal_error("Undefined destination!");
return;
}
/* get symbol value */
value = lablptr->value;
}
/* opcode */
putbyte(data_loccnt, 0x20);
putword(data_loccnt+1, value);
/* output line */
println();
}