It could be a few things. Without seeing it and the board in person I can only guess. RAM would be my first guess because if something is borked in the RAM it could display corruption. I think the C128 also only tests half the memory so there could be an issue with the other half. Also char...
I have yet to find that but I have only used them on Pentium Gen motherboards so it is good to know. The datasheet states they are direct replacements for the DS1287 but yeah I am sure there are some cases anyway. The last one I replaced was on a gigabyte motherboard. Interestingly when...
I really hate those Dallas All in one clock/battery/sram chips. Thankfully there are alternatives and you can still buy brand new manufactured ones from Digi-Key, Mouser and even Amazon. I just bought 2 yesterday that were made in the later half of 2023. Of course they will last about 5 - 6...
It is so odd that all of that will not work. The 7500 board is pretty robust. Unless you have the wrong memory or bad memory or broken PSUs it seems odd that all those components provide the same result. I have an old 7500 in a self-destructing case that I pull off the shelf of my office...
Thanks for sharing and I am glad the ZuluIDE is on the horizon. I could probably use it now as is but my main use case is Fixed Disk HD emulation. That said I am open to supporting and will take the rest to email.
Thanks and please keep us updated on this thread if you can on major milestones.
I hope that fixes it. I seem to recall there is a CUDA chip reset button on the logic board. I seem to remember having to use that button in order to get one of my PCI Power Macs to boot after swapping CPU or something. When you get your new CPU card and it still doesnt boot, try holding that...
I have tried many different SIMM modules now and this thing still refuses to get past the beep code for bad RAM. If I take the RAM out there is no beep codes but the same post codes on the analyzer.
What I have tried:
Keyboard connected
Battery Connected
VGA Card connected
Re-flowed all the...
It certainly can't hurt unless you do damage while recapping. I have a 7200/75 logic board I don't use and took a few caps off just to see and none of them had any signs of leaking. But yeah they are almost 30 years old at this point so they should all be considered time bombs...
That 6100...
Yeah if the problem is the CPU card then it wouldn't hurt to upgrade it. None of the PowerMacs I have seem to have any cap issues. The only PowerMac I have needed to recap was a 6100 as the caps were leaking and literally falling off the board. I don't know if they used better caps on the PCI...
The 820-0780-A is not a G3/G4 card. Apple didn't make a G3 processor card for the older PCI macs. At least not that I recall. I know 3rd party cards are available as I have a G3 made by another company.
The 820-0780-A is a 150 Mhz 604 CPU. I think originally paired with an 8500 or 9500...
Thank you. That is what I thought too. Perhaps something else is dodgy on this board. I will keep trying other modules. I have checked the SIMM sockets and they are clean as I did clean them and no cracked solder joints or anything that I can tell with a magnifier.
I guess I need to dig...
Just to add a couple things I missed. I removed the barrel battery and amazingly it did not leak even a little. So got lucky on that one. It has an EXT BATT connector so a 3AA holder should do the trick.
For storage I have plenty of IDE drives but more then likely will use a CF card.
I want...
Greetings All,
I recently found a 386 Baby AT board and thought it would be fun to build a PC around it as I didn't experience 386 DOS days as I was an Amiga user until a 486 in 1994.
So I am looking for comments and suggestions and help along the way to make this thing work.
The motherboard...
With regard to the ZuluSCSI and the Blue to a degree there have been loads of firmware releases that have fixed a ton of issues and added a lot of features. Perhaps the newer releases will fix your issues? One thing they added with Zulu that makes it super easy to create images is to put a...