/* read_* functions must return 0xff if nothing to read!!! */
static BYTE read_ciapb(cia_context_t *cia_context)
{
BYTE byte = 0xff;
byte = read_userport_pbx(0x1f, byte);
/* The functions below will gradually be removed as the functionality is added to the new userport system. */
#if defined(HAVE_RS232DEV) || defined(HAVE_RS232NET)
if (rsuser_enabled) {
byte = rsuser_read_ctrl(byte);
} else
#endif
byte = parallel_cable_cpu_read(DRIVE_PC_STANDARD, byte);
byte = (byte & ~(cia_context->c_cia[CIA_DDRB]))
| (cia_context->c_cia[CIA_PRB] & cia_context->c_cia[CIA_DDRB]);
return byte;
}
BYTE pio1_read(WORD addr)
{
BYTE pio1_value = 0xff;
/* Correct clock */
ted_handle_pending_alarms(0);
/* The functions below will gradually be removed as the functionality is added to the new userport system. */
if (drive_context[0]->drive->parallel_cable
|| drive_context[1]->drive->parallel_cable) {
pio1_value = parallel_cable_cpu_read(DRIVE_PC_STANDARD, pio1_value);
} else {
pio1_value = pio1_data;
}
pio1_value = read_userport_pbx(0xff, pio1_value);
if (tape_sense) {
pio1_value &= ~4;
}
return pio1_value;
}
BYTE cia2_read(WORD addr)
{
BYTE retval = 0xff;
if ((addr & 0x1f) == 1) {
retval = read_userport_pbx(0x1f, retval);
/* The functions below will gradually be removed as the functionality is added to the new userport system. */
if (ps2mouse_enabled) {
retval &= (ps2mouse_read() | 0x3f);
}
if (c64dtv_hummer_adc_enabled) {
retval &= (hummeradc_read() | 0xf8);
}
return retval;
}
/* disable TOD & serial */
if (((addr & 0xf) >= 8) && ((addr & 0xf) <= 0xc)) {
return 0xff;
}
return ciacore_read(machine_context.cia2, addr);
}
