VOGONS

Common searches


Search results

Display options

Re: TM32 - elegant standalone MT32Pi synth

Would the midi cable with the DIN connectors work with an old keyboard switch like this? https://www.cablesonline.com/abmonswitbox1.html It may, if the said box simply switches between connectors pin-for-pin. MIDI only uses pins 4 and 5 on the DIN connector. One possible complication however is …

Re: BIOS checksums

Is it Ami? Phoenix? Award? There are tools to add option roms. I've thing to be aware of, there's a signature for oproms. They have to start with... 55aa Iirc. It's neither. It is a very special custom ROM made by Philips for a Magnavox 386 computer. Yes, the configured XTIDE code I used has the …

Re: 386 board dead?

Not necessarily the cache itself. Could be traces from cache to chipset, connections from those traces to either the cache chips or the chipset... Probably the first thing I'd do is reflow the chipset. The legs on that chip are likely to detach from the underlying pads and make bad contacts.

Re: BIOS checksums

Actually... I think I have a (partial) answer. It looks like the W27C010 chips I was using for testing are not pin compatible with the S27C1001 that the original BIOS is in. 🙁 I ordered a few of the latter and willl have to test again, this time hopefully with the right pin-compatible chip.

Re: BIOS checksums

Hmm, I found this project https://github.com/kpanic23/QB-checksummer ran the tool on a few bios files which I know have a good checksum and it said they are valid Then I cut the system BIOS part from that composite file above and ran the tool on it, it says good checksum Then I did the same with my …

BIOS checksums

I am trying to modify a BIOS and I think I'm failing because I end up with an invalid checksum. It's not a change in the BIOS code itself, I am just adding a small piece of code (an option ROM) inside the main BIOS file in an otherwise empty area. I made sure to align it properly to 2k, not change …

Page 1 of 109