If I only want the output of the headphone jack, do I just solder the resistor/capacitor near the headphone jack and chip?

This would be nice for my sbc pentium 1/2 cards.

Did any of the optimized re spins get done?

CarbonLTM wrote on 2022-12-23, 02:25:

If I only want the output of the headphone jack, do I just solder the resistor/capacitor near the headphone jack and chip?

You can skip the resistors and capacitors for the joystick port if you like but most other components are necessary.

Sphere478 wrote on 2022-12-23, 02:50:

Did any of the optimized re spins get done?

I did hear from someone who made an optimized version with the intention to sell them, but he was having trouble getting them working. As he refused to open-source it I refused to help (since he was still using my footprints/schematic etc, rather unfair).

Ah, well if someone with soundcard design experience wants to help me I would be willing to put in the time on the drafting. Just give me some idea what design rules/methods are important and I can draft it! 😀

I’m on kicad 6.0

My re spin would be public domain. Full open source. But would credit origional author on silk. 😀

I finally got a nice small PC/104 MB with AMD Elan 520 (a low-power 486 on steroids @133MHz). PCB marking says "Dr. Berghaus Gmbh" which I couldn't find much about but it seems to be very similar to Kontron 520 (well known industrial PC manufacturer with good support) where full manual with pinouts is available. So I made a simple wire adapter for CRT and KBD and it booted. Then I need some 44 pin 2mm pitch IDE cable.

...and of course the soundcard so I already got PCBs from JLC and started the assembly. I used CS4236B-KQ that I had spare (soldered off some old MB with oboard sound) instead of 4237 but it should be compatible. Now I'm waiting for the xtal, 16.9344MHz is pretty weird f so don't have any.

Hello Rastri,

I was wondering, maybe adding the MT32-Pi based on RPi zero to the card would be helpful (40 pin, like the one on the Tinyllama 2 with the DAC board).
Thank you for your awesome project