//
// JERRY byte access (read)
//
uint8_t JERRYReadByte(uint32_t offset, uint32_t who/*=UNKNOWN*/)
{
if ((offset >= DSP_CONTROL_RAM_BASE) && (offset < DSP_CONTROL_RAM_BASE+0x20))
return DSPReadByte(offset, who);
else if ((offset >= DSP_WORK_RAM_BASE) && (offset < DSP_WORK_RAM_BASE+0x2000))
return DSPReadByte(offset, who);
// LRXD/RRXD/SSTAT $F1A148/4C/50 (really 16-bit registers...)
else if (offset >= 0xF1A148 && offset <= 0xF1A153)
return DACReadByte(offset, who);
// F10036 R xxxxxxxx xxxxxxxx JPIT1 - timer 1 pre-scaler
// F10038 R xxxxxxxx xxxxxxxx JPIT2 - timer 1 divider
// F1003A R xxxxxxxx xxxxxxxx JPIT3 - timer 2 pre-scaler
// F1003C R xxxxxxxx xxxxxxxx JPIT4 - timer 2 divider
else if ((offset >= 0xF10036) && (offset <= 0xF1003D))
{
/* Unhandled timer read (BYTE) */
}
else if (offset >= 0xF14000 && offset <= 0xF14003)
{
uint16_t value = JoystickReadWord(offset & 0xFE);
if (offset & 0x01)
value &= 0xFF;
else
value >>= 8;
// This is wrong, should only have the lowest bit from $F14001
return value | EepromReadByte(offset);
}
//
// JERRY byte access (read)
//
uint8_t JERRYReadByte(uint32_t offset, uint32_t who/*=UNKNOWN*/)
{
#ifdef JERRY_DEBUG
WriteLog("JERRY: Reading byte at %06X\n", offset);
#endif
if ((offset >= DSP_CONTROL_RAM_BASE) && (offset < DSP_CONTROL_RAM_BASE+0x20))
return DSPReadByte(offset, who);
else if ((offset >= DSP_WORK_RAM_BASE) && (offset < DSP_WORK_RAM_BASE+0x2000))
return DSPReadByte(offset, who);
// LRXD/RRXD/SSTAT $F1A148/4C/50 (really 16-bit registers...)
else if (offset >= 0xF1A148 && offset <= 0xF1A153)
return DACReadByte(offset, who);
// F10036 R xxxxxxxx xxxxxxxx JPIT1 - timer 1 pre-scaler
// F10038 R xxxxxxxx xxxxxxxx JPIT2 - timer 1 divider
// F1003A R xxxxxxxx xxxxxxxx JPIT3 - timer 2 pre-scaler
// F1003C R xxxxxxxx xxxxxxxx JPIT4 - timer 2 divider
//This is WRONG!
// else if (offset >= 0xF10000 && offset <= 0xF10007)
//This is still wrong. What needs to be returned here are the values being counted down
//in the jerry_timer_n_counter variables... !!! FIX !!! [DONE]
//This is probably the problem with the new timer code... This is invalid
//under the new system... !!! FIX !!!
else if ((offset >= 0xF10036) && (offset <= 0xF1003D))
{
WriteLog("JERRY: Unhandled timer read (BYTE) at %08X...\n", offset);
}
// else if (offset >= 0xF10010 && offset <= 0xF10015)
// return clock_byte_read(offset);
// else if (offset >= 0xF17C00 && offset <= 0xF17C01)
// return anajoy_byte_read(offset);
else if (offset >= 0xF14000 && offset <= 0xF14003)
// return JoystickReadByte(offset) | EepromReadByte(offset);
{
uint16_t value = JoystickReadWord(offset & 0xFE);
if (offset & 0x01)
value &= 0xFF;
else
value >>= 8;
// This is wrong, should only have the lowest bit from $F14001
return value | EepromReadByte(offset);
}