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Small correction to YMFM I/O port handlers.

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This commit is contained in:
OBattler
2022-11-20 12:27:05 +01:00
parent 5352732a99
commit 3deacca28d
1 changed files with 7 additions and 8 deletions
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15
src/sound/snd_opl_ymfm.cpp
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@@ -320,12 +320,12 @@ ymfm_drv_read(uint16_t port, void *priv)
{
YMFMChipBase *drv = (YMFMChipBase *) priv;
if (port == 0x381) {
port += 4;
} /* Point to register read port. */
if (drv->flags() & FLAG_CYCLES) {
if ((port == 0x380) || (port == 0x381))
port |= 4;
/* Point to register read port. */
if (drv->flags() & FLAG_CYCLES)
cycles -= ((int) (isa_timing * 8));
}
uint8_t ret = drv->read(port);
drv->update();
@@ -339,9 +339,8 @@ ymfm_drv_write(uint16_t port, uint8_t val, void *priv)
{
YMFMChipBase *drv = (YMFMChipBase *) priv;
ymfm_log("YMFM write port %04x value = %02x\n", port, val);
if (port == 0x380 || port == 0x381) {
port += 4;
}
if ((port == 0x380) || (port == 0x381))
port |= 4;
drv->write(port, val);
drv->update();
}