Replacement sound51 card for the old bally sound card AS-2518-51 (the board with the ay-8910 sound chip)
Here you see the early bally sound card as-2518-51. This soundcard based on the 6802 or the 6808 with the large ay-8910 sound chip.
I decided to built a new one from scratch.
Here you see my layout:
I altered the orignal design in the following way:
The ay-8910 sound chip is replaced with the ay-8912 sound chip (this chip is also used on the ball s&T board).
I removed the 6810, so you can use only a 6802 chip.
The amplifier is a tda 2003 (not a tda 2002)...
The sound51 card is much smaller in the physical dimensions
Soundcard should be on betatest soon...
Ehm...well, ...I did some connections wrong...(Revison R1.10 is on the way)...