Thank you very much for that hint! It sounds very interesting! Do you have any more detailed info about that mod or know where I would need to search for it?

Hi, recently I started the restoration of an IBM 5150 in my collection and while checking out the motherboard, I stumbled upon some RAM chips that have absolutely no marking or label at all (neither on top nor on the back). Also looking at them under the microscope shows no trace of deteriorated or …

ViTi95, thank you very much for your offer! Propbably it won't work if it's not the right chipset, so it's likely not worth trying to make the dump. However, due to more intensive research of what a required VGA BIOS version could be (version 435-0016-47 seems to be right), I finally stumbled upon a …

Hi, I recently picked a Video Seven EGA/VGA Video card with a Cirrus Logic GD410/420 chipset from a trashed computer. Unfortunately someone seems to have removed the VGA BIOS before. Does anyone of you know a place to find VGA BIOS ROM dumps or maybe even owns such a card and could create a ROM dump …

Great to see that there are already so many MR-BIOS dumps saved! 😀 I'm desperately searching for the ETEQ Cougar (82C491/82C492 chipset) version of MR-BIOS for quite a while, so if anybody owns this BIOS, I would highly appreciate a ROM dump!

@dreamblaster: got your pm and will do more tests tomorrow 😀 Unfortunately I can't pm you back right now, as new members on vogons apparently don't have rights for that. I already asked the admins if they can unlock me. If it's not working soon, I will contact you differently.

I wonder if the issue I had was similar, and changing the commands around would somehow change something in the signals similar to the resistor you added. That's interesting! As it can be seen on the comparison of the Adlipt TSR and the OPL2TEST program, a small timing difference of the command …

SteveC wrote: Well would you look at this https://youtu.be/adhjvT4SeyQ 😀 Thanks sayjionix Nice! 😁 I'm glad it helped also for your PS/2! Cheers, sayjionix

Hi again! today I made some analyses to find out what causes the OPL2LPT to output only distorted screechy sounds on some of my computers / IO-controllers. I think I came to an idea and an option to fix it, but not sure if this is the preferred way, so please let me know what you think. I started …

Hi! Just got my OPL2LPT two weeks ago and tried it on several machines after the soldering assembly. While it works like a charm on my IBM Thinkpad 380D (games tested so far: Prince of Persia, LHX Attack Chopper, Monkey Island 1), I have exactly the same issue that also SteveC faces with his PS/2 …