First post, by Ozzuneoj
So, I've had this board for a while and I managed to fix some battery-damaged traces last year to get it up and running. It is having some issues again, so I'll need to investigate those further, but after looking at the board it occurred to me that I'd never really known much about it. This era is still very new to me.
Is the socket on this board only for 387SX co-processors or can it be used to add a 386DX? I can't seem to find any DX chips that use that type of package\socket, so I'm assuming it is just for a 387SX. Is there any other way to upgrade the CPU? I probably won't, I'm just curious.
How about the cache on the board. I've read that it is somewhat uncommon for a 386SX to have onboard cache. How much will this help performance, do I need to do anything to utilize it, and is it worth adding more?
Finally, the battery needs replaced but I have yet to find simple, specific directions explaining what kind of diode I would need to add to prevent the board from trying to charge a lithium cell, or how to install it. I can solder, but I know very little about the low level interaction of these kinds of components. If someone can explain this and show with a simple picture where to solder it, I'd be most appreciative.
EDIT: Here is the TH99 page for this board. https://th99.bl4ckb0x.de/m/C-D/33092.htm
Now for some blitting from the back buffer.