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Re: Cs4235 to cs4237b transplant possible?

Posted on 2023-06-06, 22:56

Ok, while i'm still waiting to recover that thinclient in lack of a proper bios dump... I decided to do the same procedure in a crystal cx4235 card I got recently, just to see if it works... Couldn't find if there is any difference between cs4235 and cx4235 but tried anyways, so replaced the chip …

Re: Cs4235 to cs4237b transplant possible?

Posted on 2023-04-10, 17:16

yes, I did, the only notable differences where the need for filter capacitors on the cs4235 but shouldnt be so different. First I need to recover the original bios from the computer, had to unsolder the chip and installed it in a socket, but don't have a plcc eeprom burner, and I don't know if the …

Re: Cs4235 to cs4237b transplant possible?

Posted on 2023-04-10, 00:22

Yes, my ignorance can be as great as my determination to make things work, that's how I've learned most of the stuff... I dumped the bios and opened with an hex editor to see the contents, and there was plenty of "blank" memory, and a big part that just had something like text saying ibmBios so I …

Re: Cs4235 to cs4237b transplant possible?

Posted on 2023-04-09, 09:06

So, Finally after one year, I did the mod and replaced the cs4235 chip with the cs4237 and... it didn't work... Chip is detected but not working on dos and in windows it gets detected as Crystal Codec but can't install any drivers, I guess the lack of an eprom makes it not to be able to give any …

Re: Cs4235 to cs4237b transplant possible?

Posted on 2022-04-15, 07:08

This is a little strange, but it is nothing disastrous yet. First, let's address the basic questions: Are you able to get sound in Windows? Can you do your testing from basic DOS (no Windows loaded)? What does UNISOUND /CL report from straight DOS? Before running anything else, what do you see if …

Re: Cs4235 to cs4237b transplant possible?

Posted on 2022-04-15, 05:21

Did you also try Alt+A in resource.exe? That's the one that's always been finding it for me, even when everything else failed. If still nothing is found then, I guess there really is none. I'm a bit surprised about the CSC4236 ID unisound is showing for the card - I'd expect the CS4235 to report …

Re: Cs4235 to cs4237b transplant possible?

Posted on 2022-04-14, 21:47

I've checked the motherboard for possible small chips like those eeproms but couldn't find any (the ones near the cs4235 chip are amps). Unisound detects a 4236 chip which is incorrect but I've tried to initialise the chip also with the original cwdinit and resource.exe can't find the eeprom I've …

Re: Cs4235 to cs4237b transplant possible?

Posted on 2022-04-14, 11:59

I just saw they mention a few differences with cx423xB chips but not sure if they apply... Check attachment. Hope someone knows... Did you just take a photo of your screen with a camera and post it in a forum? kerop seems to know about the cs4237b: https://www.vogons.org/viewtopic.php?t=70682 …

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