Howdy.
I'm trying to get my newly-acquired Model M running. So far it's been going good: I've installed an ATX PSU (the M has an exotic power connector, which turned out to be a bunch of "molex" pins protruding directly from the motherboard), the FDD is also working (tested with another machine). Eventually, I got stuck at installing the graphics card.
It's a Trident TVGA9000C. When I set the SW1 switch on the motherboard to "RESERVED" (EGA), I'm getting 1 high-pitched and 5 low-pitched POST beeps, regardless of whether the card is installed or not. When I change the setting to "Color" or "Monochrome", beeps change to 1-4 followed by 1-7.
I checked the code of the Model M BIOS (both 3.30 and 4.71, dumps found on the Internet), and it seems like 1-5 might have something to do with the graphics card: the routine tries to write 8000 bytes to b800:0000, read them, and compare the output with what has been written. If I'm not mistaken, this would suggest that the computer doesn't see the card at all.
So, I've found a discussion where someone presents a mod enabling the Trident to work with a PC 5150. Should I attempt to do that mod and see if it helps, or maybe there is something I should try first?
Thanks for the help.
I'm trying to get my newly-acquired Model M running. So far it's been going good: I've installed an ATX PSU (the M has an exotic power connector, which turned out to be a bunch of "molex" pins protruding directly from the motherboard), the FDD is also working (tested with another machine). Eventually, I got stuck at installing the graphics card.
It's a Trident TVGA9000C. When I set the SW1 switch on the motherboard to "RESERVED" (EGA), I'm getting 1 high-pitched and 5 low-pitched POST beeps, regardless of whether the card is installed or not. When I change the setting to "Color" or "Monochrome", beeps change to 1-4 followed by 1-7.
I checked the code of the Model M BIOS (both 3.30 and 4.71, dumps found on the Internet), and it seems like 1-5 might have something to do with the graphics card: the routine tries to write 8000 bytes to b800:0000, read them, and compare the output with what has been written. If I'm not mistaken, this would suggest that the computer doesn't see the card at all.
So, I've found a discussion where someone presents a mod enabling the Trident to work with a PC 5150. Should I attempt to do that mod and see if it helps, or maybe there is something I should try first?
Thanks for the help.