Thinking of trying to roll my own 486 board, but I need a schematic to go off of. Anyone have any 486 schematics that I can use? Can't seem to find any online.
It would be highly chipset dependent. There is one for a 386 at the end of this datasheet though to get you started: https://theretroweb.com/chipset/documentation … 8e471224329.pdf
jakethompson1 wrote on 2024-08-03, 22:55:It would be highly chipset dependent. There is one for a 386 at the end of this datasheet though to get you started: https://theretroweb.com/chipset/documentation … 8e471224329.pdf
Thanks. I do have a spare 386 processor sitting around...
You could check one of the recent RMC episodes:
https://m.youtube.com/watch?v=7bf-Stkm_4A
Also not a 486 (but a Commodore PC20) but I think they too share a complete board layout.
How about 386? https://alexandrugroza.ro/microelectronics/sy … sbmc/index.html
chipset supports 486 so its just a matter of wiring different socket
https://github.com/raszpl/sigrok-disk FM/MFM/RLL decoder
https://github.com/raszpl/FIC-486-GAC-2-Cache-Module (AT&T Globalyst)
https://github.com/raszpl/386RC-16 ram board
https://github.com/raszpl/440BX Reference Design adapted to Kicad
rasz_pl wrote on 2024-08-04, 21:35:How about 386? https://alexandrugroza.ro/microelectronics/sy … sbmc/index.html
chipset supports 486 so its just a matter of wiring different socket
That could work
Here is the only schematic I've found some time ago for 486. It's the AMD reference design for PCI board based on Am486 with PCI made with Ali chipset:
https://www.elenota.pl/datasheet-pdf/59686/AM … f3ff052593f4a4f
Here is Intels Low power 486sx eval board doc with schematic: https://www.ardent-tool.com/CPU/docs/Intel/48 … /272815-001.pdf
Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun
Horun wrote on 2024-08-10, 03:48:Here is Intels Low power 486sx eval board doc with schematic: https://www.ardent-tool.com/CPU/docs/Intel/48 … /272815-001.pdf
There are no schematics in this pdf. It looks like the schematics were included with the software package for the board.
At the end of this page, there is a file called ULP486sx.pdf which is a schematic for a 486 computer. Hope it helps.
https://www.retrobrewcomputers.org/doku.php?i … linux-sbc:start
Yep that is it EduBat, for the Intel 486sx eval board. I forgot that the schems were separate. was back in 2017 when I grabbed the files off the Intel developer site, my bad.
Here is what I grabbed, same but as separate .pdfs.......
Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun
Ohh forgot this which is the original Intel dev schem .ps and .sch files from 1995/96...can be opened with 7zip
Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun
