Internal Port Decoding b16-23 Register
From SpecNext official Wiki
Number | $84 |
---|---|
Readable | Yes |
Writable | Yes |
Short Description | Enabling internal ports decoding |
Bit | Description |
---|---|
7 | (bit 23) Enabling SpecDrum DAC Output ($xxDF / 223) (DAC mono Specdrum) |
6 | (bit 22) Enabling ($xxB3) (DAC mono GS Covox) |
5 | (bit 21) Enabling ($xxFB) (DAC mono Pentagon/ATM (sd mode 2 off)) |
4 | (bit 20) Enabling ($xx0F) and ($xx4F) (DAC stereo Covox) |
3 | (bit 19) Enabling ($xx3F) and ($xx5F) (DAC stereo profi Covox) |
2 | (bit 18) Enabling ($xxF1), ($xxF3), ($xxF9) and ($xxFB) (DAC soundrive mode 2) |
1 | (bit 17) Enabling ($xx0F), Kempston Joystick ($xx1F / 31), ($xx4F) and ($xx5F) (DAC soundrive mode 1) |
0 | (bit 16) Enabling Turbo Sound Next Control ($FFFD / 65533) and Sound Chip Register Write ($BFFD / 49149) |
All bits are set to 1 upon soft reset.
(note: Next registers with number higher than $7F are inaccessible from Copper code)