First post, by hahokas
I'm new to the board, so please excuse my short comings in board etiquette. Also English is my second language so excuse for that also.
So to the point of the subject.
I have recently find my first PC from my parents house. This is from the time that I wasn't so much in to the hardware side of it's inner workings. That came later for me at the Athlon era.
I'm interested in restoring it to it's former glory. But frantic googling hasn't given me all the answers, so i must seek higher knowledge of the inner workings of the 486 era computers.
So it's a clone machine from mid 90's, but together in Finland by Mikrolog Ltd that had acquired the Osborne computer trademark.
Some specs that i have managed to dig up so far:
Full model: Osborne LP4D-33-L3 LH-2306-01 (-94)
CASE: Clone design case in Pizzabox/breadbox form factor
CPU: Intel i486Dx 33 MHz
MEM: 16 MB's of memory of some kind, original amount consisted 4MB
HDD: is missing, but it used to have Western Digital WDAC2340 325MB drive in it
FDD: also missing, but it must have been some generic 1,44M 3,5"
MB: it seems to be a UMC chipset board, with Cirrus Logic CL-GD54228-80QC-A LBA VGA adapter built in to it.
5 ISA slots on a riser card.
31-XP9486L-[BLANK] this is the only resemblence of a modelnumber on the motherboard.
BIOS: AMIBIOS 40-0100-000000-10111111-040493-UMC491-H
PSU: Chiu electronics P-2005S 200W
If I remember correctly, I did have Sound Blaster AWE32 and CD-ROM drive in there, but they seem to be lost in time.
Also I have tried to get a CF card adpater working for the software installation side.
Machine boots up and after I soldered new Lithium battery on it remembers the BIOS settings.
My question being, how can I decipher the motherboard, if I there is any upgrade paths to take, more memory, faster CPU, adding L2 cache, better graphics, sound card.
And if there's any generic info about the machine and it's motherboard, that would be much appreciated.
And what BIOS settings can or should be changed?
Purpose for me is the tinker with the machines hardware and play period accurate games. Mayby some windows 3.11 nostalgia.