First post, by Deksor
- Rank
- l33t
Hi everybody !
Today I received many old CPUs with bent pins including that AMD 5x86 !
So I followed (incorrectly at first, but this is important to note) my motherboard's documentation about the AMD 5x86 and so here is it :
So like I said I configured it wrong once (I did put a jumper on the 1-2 pins of "JP11" instead of "JP12"), the PC booted, I did check if I could enable write-back cache and of course, I was able to do this. Then I booted DOS and started speedsys and then I discovered that the CPU was detected as a DX4 (here is where I figured out it was configured incorrectly). I finished the benchmark (I wanted to see how many MB/sec I earned in comparison to the previous DX4 chip which only had 8KB of Write-through cache) and there was a slight difference there. But since it's a 5x86, I did put the right configuration for it as says the motherboard's documentation. And here is where problems are begining. First I went into the bios and I saw that the Write-Back setting for L1 cache was not accessible anymore, then I still wanted to boot on my HDD ... but now once it has tested the ram and after the first floppy disk drive (I've got two fdd), the computer freezes and the second fdd is making the disk to spin and the access light stays on. The keyboard doesn't respond either, so this is a total crash of the machine.
As you may see on the photo, the "JP12" is placed incorrectly. (2-3 instead of 1-2 for AMD's 5x86) and that's just because I wanted to check if they just misplaced the jumper on the documentation, but it didn't help ...
The only difference on the documentation between this CPU and the DX4-100 with 8KB of write-throught L1 cache is this jumper, so I have no Idea why it doesn't work 🙁
Please help 😢
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