• rehsd

6502 Sound Card -- Suggested changes to this design?

My next PCB: a sound card for my 6502 system. I'm setting it up for the potential of four programmable sound generators, but only two would need to be populated. With all four, stereo audio with six subchannels would be possible.


The PCB is a four-layer PCB with inner planes for VCC and GND. The card will require power and two full VIA ports to be supplied.


I'm including two EEPROM ZIF sockets. Neither EEPROM would need to be populated. The PCB will support zero, one, or two EEPROMs.


As the PCB sits now, the per PCB (unpopulated) cost is approximately $10 USD.


What am I overlooking? Suggestions to improve the design? Let me know! Thanks!


Note: The latest revision is at the bottom of this posting.


Schematic
Schematic
Empty PCB - Front
Empty PCB - Front
Partially Populated PCB - Front
Partially Populated PCB - Front
Partially Populated PCB - Front
Empty PCB - Back
Partially Populated PCB - Back
Partially Populated PCB - Back

Postscript

I updated the schematic to split the EEPROMs between set 1 and set 2 of the PSGs. No glue logic needed.

Updated schematic to split out EEPROMs
Updated schematic to split out EEPROMs
Updated PCB to split out EEPROMs
Updated PCB to split out EEPROMs


PPS

After some cleanup, here's what I have. I think this is pretty close to being ready to order.

Schematic Revision 0.3
Schematic Revision 0.3

PCB Front Revision 0.3
PCB Front Revision 0.3

PCB Back Revision 0.3
PCB Back Revision 0.3

PCB Front 3D Revision 0.3
PCB Front 3D Revision 0.3

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