Please, check our SMD/THT services - smd.lotharek.pl; from idea to ready devices
Please, check our SMD/THT services - smd.lotharek.pl; from idea to ready devices
POKEY chips are very rare these days and extremely hard to obtain or buy...But since there are so many stereo productions out there, I wanted my device to play them too! :-)
And I wanted it NOW!
So, once again, we (Lotharek and AcidMaker) met, and after many hours of discussions, we are proud to introduce:
ACID STEREO Upgrade for all ATARI 8-bit systems!
This upgrade utilizes the original POKEY chip and adds extra functionality implemented inside the FPGA —
a perfect marriage of old-school and modern electronics… because THIS IS THE WAY.
Uses the original POKEY chip for SIO routines, POTs, and keyboard functions
Integrates extra 2 POKEYs / 4 COVOX inside the FPGA
Dedicated 32-bit, 384 kHz DAC for superior sound output
Proper audio source mixing:
PBI and SIO audio are converted from analog to digital via two ADCs
Mixed digitally inside the FPGA
Output sent to the DAC for crystal-clear sound
2-layer PCB, slightly larger than the original POKEY
Mono productions are played in stereo with channel interpolation (2 selectable modes)
Stereo productions sound exactly as intended — but with one major improvement:
→ No humming in the speakers from your Atari!
PINOUT:
EXTERNAL DEVICE DEDICATED AUDIO OUTPUTS:
NEW MONO AUDIO - for "inside ATARI use" only
INPUTS:
PCB thickness ≈ 1 mm Pin 31 is intentionally not connected! Please double-check that it is isolated from the Atari PCB.
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Acid Stereo can be installed in stages - please refer to manual
https://lotharek.pl/files/acid_stereo/acidStereo.pdf
Stage 1
Stage 2
Stage 3
Stage 4