Greetings! Does anyone know of where to find the datasheet for the OPTi 82c481/482 chipset? I have found the datasheet for the 82c206 that goes with them, but nothing for the main chipset.
Any help would be appreciated! Thanks!
https://theretroweb.com/motherboards/?chipset … 71&showImages=1
not to popular with only 4 boards and one sbc.
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 2023-04-21, 10:31:https://theretroweb.com/motherboards/?chipset … 71&showImages=1
not to popular with only 4 boards and one sbc.
They only have the datasheet for the 82c206. I need data for the main chipset .
Sorry I didnt mean to suggest they have the datasheet. I was just remarking it seems to be extremely rare chipset.
What exactly do you need the documentation for? perhaps there are other ways of solving the problem, reverse engineering from tracks on the motherboard.
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 2023-04-21, 15:47:Sorry I didnt mean to suggest they have the datasheet. I was just remarking it seems to be extremely rare chipset.
What exactly do you need the documentation for? perhaps there are other ways of solving the problem, reverse engineering from tracks on the motherboard.
It's all good friend! I have a 486 mobo, a KMC486-25, and there is no documentation for it anywhere. I wanted the chipset datasheets so I could reverse engineer the board and figure out what the jumpers all do.
ah, Identifying KMC Opti Chipset 486sx Mobo I totally forgot about it 😀
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
