public ushort SPEED_Read16(uint addr)
{
switch (addr)
{
case SPEED_Header.SPD_R_INTR_STAT:
Log_Verb("SPD_R_INTR_STAT 16bit read " + regIntStat.ToString("X"));
return(regIntStat);
case SPEED_Header.SPD_R_INTR_MASK:
Log_Verb("SPD_R_INTR_MASK 16bit read " + regIntrMask.ToString("X"));
return(regIntrMask);
case SPEED_Header.SPD_R_REV_1:
Log_Error("SPD_R_REV_1 16bit read " + 0.ToString("X"));
return(0);
case SPEED_Header.SPD_R_REV_2:
Log_Verb("STD_R_REV_1 16bit read " + regRev1.ToString("X"));
return(regRev1);
case SPEED_Header.SPD_R_REV_3:
UInt16 rev3 = 0;
if (DEV9Header.config.HddEnable)
{
rev3 |= SPEED_Header.SPD_CAPS_ATA;
}
if (DEV9Header.config.EthEnable)
{
rev3 |= SPEED_Header.SPD_CAPS_SMAP;
}
rev3 |= SPEED_Header.SPD_CAPS_FLASH;
Log_Verb("SPD_R_REV_3 16bit read " + rev3.ToString("X"));
return(rev3);
case SPEED_Header.SPD_R_0e:
UInt16 r0e = 0x0002; //Have HDD inserted
Log_Verb("SPD_R_0e 16bit read " + r0e.ToString("X"));
return(r0e);
case SPEED_Header.SPD_R_XFR_CTRL:
Log_Verb("SPD_R_XFR_CTRL 16bit read " + regXFRCtrl.ToString("X"));
return(regXFRCtrl);
case SPEED_Header.SPD_R_DBUF_STAT:
if (ifRead) //Semi async
{
HDDWriteFIFO(); //Yes this is not a typo
}
else
{
HDDReadFIFO();
}
FIFOIntr();
byte count = (byte)((bytesWriteFIFO - bytesReadFIFO) / 512);
UInt16 r38;
if (xfrWrite) //or ifRead?
{
r38 = (byte)(SPEED_Header.SPD_DBUF_AVAIL_MAX - count);
r38 |= (count == 0) ? SPEED_Header.SPD_DBUF_STAT_1 : (UInt16)0;
r38 |= (count > 0) ? SPEED_Header.SPD_DBUF_STAT_2 : (UInt16)0;
}
else
{
r38 = count;
r38 |= (count < SPEED_Header.SPD_DBUF_AVAIL_MAX) ? SPEED_Header.SPD_DBUF_STAT_1 : (UInt16)0;
r38 |= (count == 0) ? SPEED_Header.SPD_DBUF_STAT_2 : (UInt16)0;
//If overflow (HDD->SPEED), set both SPD_DBUF_STAT_2 & SPD_DBUF_STAT_FULL
//and overflow INTR set
}
if (count == SPEED_Header.SPD_DBUF_AVAIL_MAX)
{
r38 |= SPEED_Header.SPD_DBUF_STAT_FULL;
}
Log_Verb("SPD_R_38 16bit read " + r38.ToString("X"));
return(r38);
case SPEED_Header.SPD_R_IF_CTRL:
Log_Verb("SPD_R_IF_CTRL 16bit read " + regIFCtrl.ToString("X"));
return(regIFCtrl);
default:
Log_Error("*Unknown 16bit read at address " + addr.ToString("x") + " value " + dev9.Dev9Ru16((int)addr).ToString("x"));
return(dev9.Dev9Ru16((int)addr));
}
}
