Description
P-COVOX – Atari COVOX mod
Hardware, manuals, FAQ, and other info on manufacturers website – HERE
P-COVOX is a very simple device, 4channel, discrete component digital-to-analog converter (DAC) that fits under PIA chip. It isn’t as Hi-Fi as modern sound cards, but its perception may be a lot better than a POKEY – especially playing MODs or NEO files
Main features :
- easy fitting – one wire in most cases
- high-quality PCB
- transparent for Atari OS / Hardware / Ultimate / etc.
- Equal audio output level on both channels
- Optional pull-up resistors on DATA LINES / not fitted by default/
INSIDE BOX :
-
P-COVOX
INSTALLATION STEP BY STEP:
If Your PIA chip is NOT socketed:
- desolder PIA CHIP
- solder precise socket into its place (supplied)
- insert P_COVOX
- Insert back PIA chip to P_COVOX
If Your PIA chip is socketed:
- remove PIA CHIP
- insert P_COVOX
- Insert back PIA CHIP to P_COVOX
Connections to be made with small wires:
- CTRL – select one pin only to set Covox`s address page:
- if you solder CTRL signal to pin 9 of LS138 on Atari board, Covox will be present at $D600
- if you solder CTRL signal to pin 10 of LS138 on Atari board, Covox will be present at $D600
- if you solder CTRL signal to pin 7 of LS138 on Atari board, Covox will be present at $D700
O2 signal problems:
- on the majority of ATARIs middle and RIGHT pins of the JP1 connector shall be jumpered/connected. No further actions required
- if Your sound is distorted, remove the jumper; then connect the RIGHT pin of JP1 to CPU pin 39
Important note
Connecting Covox audio with stereo out is not a good idea. Covox loudness may be reduced. Thus, LM358 amplifier replacement – U-MIXER is being made to mix 2x pokeys, 2x Covox audio to stereo out, mono out, and RF modulator audio.