First post, by pan069
- Rank
- Oldbie
Hi all,
I have this 286 motherboard. It seems to be in good condition except that it seems to have some problems with the memory.
There is supposed to be 1 meg on the board and when I first fire it up (after it's been cold for a while), the first time it will report 702Kb and every single time after a reboot, it will report 640Kb. I have reseated the DIPs (carefully pulled them out the sockets, cleaned the sockets with an anti static brush, and put them back in the same place). Still the same problem. Another thing that happens is that sometimes during the memory check the system will hang.
Now, there are two types of chips on the board; HY534256S-70 and ICM41C256-80. I assume that the HY* chips is the memory and maybe the ICM* chips some sort of controller? Not sure... I can find the HY* chips on Aliexpress for not to much (+-$10 USD and assuming that these are the same eventhough the ones on Aliexpress are called HY534256AS-70). However, the ICM* ones seem to be more difficult to find. Not sure if replacing is the best way to go though? Is there a way I can test if each chip is still OK? There doesn't seem to be any physical damage to board that I can tell/see.
Any suggestions much appreciated!
By the way, pretty much all the chips on the board have a 92* denominator on it. I assume that the board is from around '92/'93?
This is a photo of the chips: