VOGONS


First post, by sparky4

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i just got this mobo
No idea whats causing this i am afraid of putting in my nice video card as it beeped those beeps when i plugged it in. so im scared of frying something.
here is the mobo

wwww

Reply 1 of 5, by rasz_pl

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https://www.lifewire.com/amibios-beep-codes-2624543
"Two short beeps mean there has been a parity error in base memory. This problem affects the first 64 KB block of memory in your RAM."
http://www.bioscentral.com/beepcodes/amibeep.htm
"2 short Memory parity error A memory parity error has occurred in the first 64K of RAM. The RAM IC is probably bad"

8 is no video card present

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

Reply 2 of 5, by sparky4

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i got it to work! i just need to install SIMM module connectors to it.

wwww

Reply 3 of 5, by sparky4

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i wonder if i can over clock the system to 20 mHz?

wwww

Reply 4 of 5, by sparky4

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i have a new issue with the mobo. so i soldered some SIMM memory slots into it and it checked all 4 mb. i ran the computer and there is keyboard glitching i think the keyboard chip gone bad but the entire system overtime locks up or glitches

wwww

Reply 5 of 5, by quicknick

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I had some issues with one of these boards, few years ago. It seemed stable, could leave it in a benchmark all day long, but few minutes idle in DOS and it would lock up... Keyboard still responding, could type some command, but when pressing <enter>, instant freeze.
Also, when quitting some programs it would annoyingly ask for the disk containing COMMAND.COM.

In the end, found out that this board absolutely hates the 3-chip 1MB SIMMs. Found some older ones with 9 chips and all the above problems went away.