Reply 20 of 25, by Jo22
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MobyGamer wrote on 2021-12-03, 20:19:Grzyb wrote on 2019-06-29, 18:54:wrote:I've also got an "Olivetti" labled PVGA1 card (related to WD90C00) with Olivetti BIOS..
Maybe this will be useful later on ?Can you try setting mode 40h via int 10h on that card?
I have a PVGA1A card in my 286-based AT&T (Olivetti) system and it works with 640x400x2 mode inits. I disassembled the Paradise VGA BIOS on that card to learn why, and found that the BIOS will redirect any int 10h calls setting the mode to 40h (640x400x2) to the host BIOS. So, to answer the mystery, these cards don't actually fully support 640x400x2 on their own because they rely on a host AT&T computer to set the mode properly.
Ah, that explains a lot! 😃 Thank you very much for your help and writing back! 🙂👍
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