I saw that video, and I love PC/104, thanks for sharing this :3

Do you mind if I try to re-do the layout to enhance analog performance and possibly add an OPL3?

I’d say go for it, ExplodingLemur, since rasteri set the license on his work to GPLv2. He clearly wanted others to benefit and modify it.

- Alex

ExplodingLemur wrote on 2021-02-11, 21:58:

Do you mind if I try to re-do the layout to enhance analog performance and possibly add an OPL3?

Yes I'd love for you to do that. Please keep us updated!

Nice work 😀 did you use Output Stage from Datasheet ? (did not yet compare it..)

matze79 wrote on 2021-02-18, 11:04:

Nice work 😀 did you use Output Stage from Datasheet ? (did not yet compare it..)

Nah just a DC blocking cap. Some cheap CS4235 soundcards did it that way so I just copied that 😀

@rasteri - thanks for sharing this amazing project and videos.

I just built one of these PC104 soundcards and got Doom going on first try with sound blaster mode via unisound tool! I am still trying to get general midi going with a DreamBlaster but otherwise working great.

Would you mind sharing the gerbers for the aluminum case sides? I tried to generate them from the circuitmaker even following PCBWay guide but I have no idea what I am doing and can't get valid ones to generate.

LittleLarrySellers wrote on 2021-10-07, 02:49:

Would you mind sharing the gerbers for the aluminum case sides? I tried to generate them from the circuitmaker even following PCBWay guide but I have no idea what I am doing and can't get valid ones to generate.

Yeah Circuitmaker is totally broken since the 2.0 update, I'm in the process of switching back to EAGLE...

Here's the files I exported last time, they still have the problem where the "86" isn't displayed unfortunately

Awesome. thanks man!

Absolutely amazing project, do you mind if I do my own spin off for ISA? I believe eprom image is attached in your files?

Teti wrote on 2021-11-30, 20:54:

Absolutely amazing project, do you mind if I do my own spin off for ISA? I believe eprom image is attached in your files?

Sure, but you can get CS4237-based ISA cards that are much better than my design for practically free.

rasteri wrote on 2021-12-01, 01:30:

Teti wrote on 2021-11-30, 20:54:

Absolutely amazing project, do you mind if I do my own spin off for ISA? I believe eprom image is attached in your files?

Sure, but you can get CS4237-based ISA cards that are much better than my design for practically free.

I know, but but... to my defence I have to say, that your project was really inspiring and hey, it would be nice to carry on in your footsteps and perhaps make a card.
I will credit you as you obviously deserve. Do you have EPROM image somewhere? I've managed to score Microchip 24LC04B in SOP8 package which I'm very please about.

Presently the MFBW1V3216-000-R mentioned in the BOM is unavailable. As my electronics knowledge is kind of lowish, I'd really appreciate if someoune coould suggest an available replacement, even better a direct mouser or digikey link.

raerek wrote on 2022-11-04, 05:28:

Presently the MFBW1V3216-000-R mentioned in the BOM is unavailable. As my electronics knowledge is kind of lowish, I'd really appreciate if someoune coould suggest an available replacement, even better a direct mouser or digikey link.

I had a quick look into the BOM and the website also, but didn't see that product number (maybe I'm missing something there). It seems to be a ferrite bead, though - the only FB I am seeing in the BOM is a 600MHz one (BLM31PG601SN1L), which is unavailable on mouser also, but with a similar one still being available: https://www.mouser.de/ProductDetail/Murata-El … /BLM31PG601SH1L

MJay99 wrote on 2022-11-04, 10:21:

I had a quick look into the BOM and the website also, but didn't see that product number (maybe I'm missing something there). It seems to be a ferrite bead, though - the only FB I am seeing in the BOM is a 600MHz one (BLM31PG601SN1L), which is unavailable on mouser also, but with a similar one still being available: https://www.mouser.de/ProductDetail/Murata-El … /BLM31PG601SH1L

Thank you for the answer, and regarding the product number, yes, my bad, I was looking at a slightly modified BOM, as the original only says "Ferrite Bead, I dunno the value". In the modified one I have the MFBW1V3216-000-R suggested for FB1.
MJay99, where have you seen the BLM31PG601SN1L ? I am simply unable to find it in this This time I am missing something I guess:)

raerek wrote on 2022-11-04, 16:51:

MJay99, where have you seen the BLM31PG601SN1L ? I am simply unable to find it in this This time I am missing something I guess:)

I can see it e.g. on the bottom of the project's website here: https://circuitmaker.com/Projects/Details/ras … 104-soundcard-3
I also checked the link again I posted before - seems it's not working anymore without the session I had before. You can just search for BLM31PG601SH1L on Mouser and it should show up.

It's also not a most critical part - it's recommended to put a ferrite bead in the datasheet, to suppress possible interference, but there's surely not gonna be magic smoke in case there'd just be a zero ohm R (e.g. for testing).

MJay99, thank you for your help. I remember having seen this site but completely forgotten about it and was working based on another version. Thank you again!

Yeah the datasheet just says "ferrite bead", I didn't do any of the calculations or testing to determine what the best value should be. To be honest I doubt it'll make much difference if you just short the pads with some solder...

rasteri wrote on 2022-11-05, 11:47:

Yeah the datasheet just says "ferrite bead", I didn't do any of the calculations or testing to determine what the best value should be. To be honest I doubt it'll make much difference if you just short the pads with some solder...

😀 You know I am beginning to learn that, but you see I am so firmly undereducated in the field of elecronincs, that it was kind of non-obvious.
Anyway, thank you, and as you happen to pass by, thank you for your excellent work on this soundcard.