P COVOX

Description

P-COVOX is a 4-channel, discrete component digital-to-analog converter (DAC) that fits under the PIA chip. It isn’t as Hi-Fi as modern sound cards, but its performance 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/
• ROHS, PB Free

 INSIDE BOX :

• A fully tested and assembled P-COVOX

INSTALLATION STEP BY STEP:

Disclaimer: If you are not familiar with soldering or you do not have proper tools, please LET a pro technician do it for you or send me your ATARI BOARD for installation. Upgrade installation cost is 10€ only. Contact me to arrange installation. Otherwise, please remember – wrong tools usage or low skills may damage the Atari and ultimate; any damage/harm to your hardware is NOT subject to any kind of warranty.

If Your PIA chip is NOT socketed:

• desolder PIA CHIP
• solder precise socket into its place (supplied)
• insert P-COVOX
• Insert PIA chip to P-COVOX

If Your PIA chip is socketed:

• remove PIA CHIP
• insert P-COVOX
• Insert PIA CHIP to P-COVOX

Connections to be made with small wire:

• CTRL – select one pin only  to set P-COVPX’s  address page:
• if you solder CTRL signal to pin 9 of LS138 on Atari board, P-COVOX will be present at $D600
• if you solder CTRL signal to pin 10 of LS138 on Atari board, P-COVOX will be present at $D600
• if you solder CTRL signal to pin 7 of LS138 on Atari board, P-COVOX will be present at $D700

 

O2 signal problems:

• On the majority of  Atari’s middle and RIGHT  pins of the JP1 connector shall be jumpered/connected. No further actions are required.
• If Your sound is distorted, remove the jumper; then  connect the RIGHT pin of JP1 to CPU pin 39

DISCLAIMER:

Connecting P_COVOX audio with stereo out is not a good idea. P-COVOX loudness may be reduced. Thus, LM358 amplifier replacement – U-MIXER is being made to mix 2 pokeys, 2 P-COVOX audio to stereo out, mono out, and modulator audio