void cia1_set_ieee_dir(cia_context_t *cia_context, int isout)
{
cia1_ieee_is_output = isout;
if (isout) {
parallel_cpu_set_bus(cia_context->old_pa);
} else {
parallel_cpu_set_bus(0xff);
}
}
static void store_pa(tpi_context_t *tpi_context, BYTE byte)
{
if (byte != tpi_context->oldpa) {
BYTE tmp = ~byte;
ieee_is_dev = byte & 0x01;
ieee_is_out = byte & 0x02;
parallel_cpu_set_bus((BYTE)(ieee_is_out ? tpi_context->oldpb : 0xff));
if (ieee_is_out) {
parallel_cpu_set_ndac(0);
parallel_cpu_set_nrfd(0);
parallel_cpu_set_dav((BYTE)(tmp & 0x10));
parallel_cpu_set_eoi((BYTE)(tmp & 0x20));
} else {
parallel_cpu_set_nrfd((BYTE)(tmp & 0x80));
parallel_cpu_set_ndac((BYTE)(tmp & 0x40));
parallel_cpu_set_dav(0);
parallel_cpu_set_eoi(0);
}
if (ieee_is_dev) {
parallel_cpu_set_atn(0);
} else {
parallel_cpu_set_atn((BYTE)(tmp & 0x08));
}
}
}
static void reset(tpi_context_t *tpi_context)
{
/* assuming input after reset */
parallel_cpu_set_atn(0);
parallel_cpu_set_ndac(0);
parallel_cpu_set_nrfd(0);
parallel_cpu_set_dav(0);
parallel_cpu_set_eoi(0);
parallel_cpu_set_bus(0xff);
cia1_set_ieee_dir(machine_context.cia1, 0);
}
static void reset(tpi_context_t *tpi_context)
{
/* assuming input after reset */
parallel_cpu_set_atn(0);
parallel_cpu_set_ndac(0);
parallel_cpu_set_nrfd(0);
parallel_cpu_set_dav(0);
parallel_cpu_set_eoi(0);
parallel_cpu_set_bus(0xff);
ieee_is_dev = 1;
ieee_is_out = 1;
}
static void pia_reset(void)
{
parallel_cpu_set_bus(0xff); /* all data lines high, because of input mode */}
static void undump_pb(BYTE byte)
{
parallel_cpu_set_bus(byte);
}
static void store_pb(BYTE byte)
{
parallel_cpu_set_bus(byte);
}
static void undump_pb(tpi_context_t *tpi_context, BYTE byte)
{
parallel_cpu_set_bus((BYTE)(ieee_is_out ? byte : 0xff));
}
static void undump_pra(via_context_t *via_context, BYTE byte)
{
parallel_cpu_set_bus(byte);
}
static void reset(via_context_t *via_context)
{
parallel_cpu_set_bus(0xff); /* all data lines high, because of input mode */
}
static void store_pra(via_context_t *via_context, BYTE byte, BYTE myoldpa,
WORD addr)
{
parallel_cpu_set_bus(byte);
}
static void undump_ciapa(cia_context_t *cia_context, CLOCK rclk, BYTE byte)
{
parallel_cpu_set_bus((BYTE)(cia1_ieee_is_output ? byte : 0xff));
}
static void store_ciapa(cia_context_t *cia_context, CLOCK rclk, BYTE byte)
{
/* FIXME: PA0 and PA1 are used as selector for the
Paddle 1/2 selection for the A/D converter. */
parallel_cpu_set_bus((BYTE)(cia1_ieee_is_output ? byte : 0xff));
}