void ersatz_perform (uint16_t what)
{
switch (what) {
case EOP_INIT:
ersatz_init ();
break;
case EOP_SERVEINT:
{
uint16_t intreq = get_word (0xDFF01E);
/* Just reset all the interrupt request bits */
if (intreq & 0x0008)
get_byte (0xbfed01); /* possible keyboard interrupt */
put_word (0xDFF09C, intreq & 0x3FFF);
break;
}
case EOP_DOIO:
ersatz_doio ();
break;
case EOP_AVAILMEM:
m68k_dreg (regs, 0) = m68k_dreg (regs, 1) & 4 ? 0 : 0x70000;
break;
case EOP_ALLOCMEM:
m68k_dreg (regs, 0) = m68k_dreg (regs, 1) & 4 ? 0 : 0x0F000;
break;
case EOP_ALLOCABS:
m68k_dreg (regs, 0) = m68k_areg (regs, 1);
break;
case EOP_NIMP:
write_log (_T("Unimplemented Kickstart function called\n"));
ersatz_failed ();
/* fall through */
case EOP_LOOP:
m68k_setpc (0xF80010);
break;
case EOP_OPENLIB:
default:
write_log (_T("Internal error. Giving up.\n"));
ersatz_failed ();
}
}
static void ersatz_doio (void)
{
uaecptr request = m68k_areg(®s, 1);
switch (get_word (request + 0x1C)) {
case 9: /* TD_MOTOR is harmless */
return;
case 2: case 0x8002: /* READ commands */
break;
default:
write_log ("Only CMD_READ supported in DoIO()\n");
ersatz_failed ();
}
{
uaecptr dest = get_long (request + 0x28);
int start = get_long (request + 0x2C) / 512;
int nsecs = get_long (request + 0x24) / 512;
int tr = start / 11;
int sec = start % 11;
while (nsecs--) {
DISK_ersatz_read (tr, sec, dest);
dest += 512;
if (++sec == 11)
sec = 0, tr++;
}
}
}
void ersatz_perform (uae_u16 what)
{
switch (what) {
case EOP_INIT:
ersatz_init ();
break;
case EOP_SERVEINT:
/* Just reset all the interrupt request bits */
put_word (0xDFF09C, get_word (0xDFF01E) & 0x3FFF);
break;
case EOP_DOIO:
ersatz_doio ();
break;
case EOP_AVAILMEM:
m68k_dreg (regs, 0) = m68k_dreg (regs, 1) & 4 ? 0 : 0x70000;
break;
case EOP_ALLOCMEM:
m68k_dreg (regs, 0) = m68k_dreg (regs, 1) & 4 ? 0 : 0x0F000;
break;
case EOP_ALLOCABS:
m68k_dreg (regs, 0) = m68k_areg (regs, 1);
break;
case EOP_NIMP:
printf ("Unimplemented Kickstart function called\n");
ersatz_failed ();
break;
/* fall through */
case EOP_LOOP:
m68k_setpc (0xF80010);
break;
case EOP_OPENLIB:
default:
printf ("Internal error. Giving up.\n");
ersatz_failed ();
break;
}
}