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SIMPLE STEREO V2


SIMPLE STEREO V2

Not yet available

 

     It all has begun long time ago, when Chuck Steinman of DataQue created this set of plans for building stereo sound by installing a second Pokey chip inside the best 8-bit computer ever. Once installed, the second channel has all its addresses 16 bytes set higher in the memory ($D210 - $D21F). Since then, dozens of sounds and demos that support this upgrade have been published. Most of these programs were made in Poland, but a few sound-demos were also made in other countries. The most popular programs (in my opinion, of course) playing msx in stereo are Yooomp! and Numen.

 

Main features :

  • GTIA sound mixing on both channnels
  • Stereo Indicator Led
  • high quality PCB
  • ONE wire control to disable/enable stereo  (built in U-switch)
  • Equal audio output on both channels
  • Stereo mode/ dual mono mode
  • ROHS, PB Free

 

 INSIDE BOX :

  • A fully tested and assembled STEREO BOARD V2
  • 2 golden plated RCA outputs

  

Disclaimer

  • POKEY CHIP NOT Included 

 

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 ~15€ only. Contact me to arrange installation. Otherwise, please remeber - wrong tools usage or low skills may damage atari and Your stereo board; any damage/harm to your hardware is NOT subject of any kind of warranty.

 

  • Desolder POKEY from ATARI board or remove it from socket
  • Insert stereo pcb into the socket or solder into atari motherboard
  • Make connections to STEREO BOARD:
    • A4 – this signal can be found in many places on ATARI BOARD; for example solder wire between CPU  (https://en.wikipedia.org/wiki/MOS_Technology_6502) pin 13 and STEREO BOARD A4 pad
    • BELL – this signal can be found on GTIA CHIP pin 15. Please solder wire between pin 15 of GTIA ( code name CO -14889) and Stereo BELL PAD
    • CTRL - stereo control; if You have ultimate upgraded computer, make connection to M0 pin; otherwise  connect GND to this pin to disable STEREO MODE (deafult ON - LED ON). Use simple "ON-OFF" switch  .

 

Audio out conenction diagram

 

 

 

 

 


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