/**
* Reads extended register
* @param[in] opna The instance
* @param[in] nAddress The address
* @return data
*/
REG8 opna_readExtendedRegister(POPNA opna, UINT nAddress)
{
if ((opna->s.cCaps & OPNA_HAS_ADPCM) && (nAddress == 0x08))
{
return adpcm_readsample(&opna->adpcm);
}
return opna->s.reg[nAddress + 0x100];
}
static REG8 IOINPCALL opnac_i18e(UINT port) {
if (opn.extend) {
UINT addr = opn.addr - 0x100;
if (addr == 0x08) {
return(adpcm_readsample(&adpcm));
}
else if (addr == 0x0f) {
return(opn.reg[addr + 0x100]);
}
return(opn.data);
}
(void)port;
return(0xff);
}
static REG8 IOINPCALL spb_i18e(UINT port) {
UINT addr;
addr = opn.addr - 0x100;
if (addr == 0x08) {
return(adpcm_readsample(&adpcm));
}
else if (addr == 0x0f) {
return(opn.reg[addr + 0x100]);
}
else {
(void)port;
return(opn.data);
}
}
static REG8 IOINPCALL p86_i28e(UINT port) {
UINT addr;
addr = g_opn3.addr1h;
if (addr == 0x08) {
return(adpcm_readsample(&g_adpcm3));
}
else if (addr == 0x0f) {
return(g_opn3.reg[addr + 0x100]);
}
else {
(void)port;
return(g_opn3.reg[g_opn3.addr1l]);
}
}