Ok, thanks I can proceed into testing. I gather VGA cards are not known to use this rail? Btw. I do not have an IBM XT, it's a XT clone from 1986 that's more closer to 5160 than 5150. https://theretroweb.com/motherboards/s/olivetti-m19

Trying to supplement original power supply with a picoPSU. It would matter a lot if I could get away without -5V I have ISAs in the system, video card, adlib card, XT-IDE. Would there be any risk of powering up the board without -5VDC present?

I've confirmed no less than 320 games that will run on a 8088 with VGA, tested with my NuXT and FreeDOS 1.3: https://docs.google.com/spreadsheets/d/1PEavgMAfA1wSmlqu87S2LVwTdvQODFoPFf9F8Oye_t8/ Sort the spreadsheet by game title, then by VGA, then by minimum CPU to see the list in alphabetical …

Hey guys, I've seen couple of videos on YT and people use a sync recombiner in between. I wonder why tho, because onboard 6 pins are for RGB,Vsync,Hsync and ground all of which Atari STe already outputs. This is analog connection 100%, GBS does not support digital standards like CGA regardless of …

That list has all XT games, only a few are EGA or VGA.... This is not even a third of the games that can run on XT, I wonder what is the criteria for this list? Text mode games are missing. Basic CGA games like Digger too. Then 'full' games like Pharaon's Tomb or Monuments of Mars, and full major …

Heh I thought that "turbo XT" is a synonym for faster 8088-2's. :) I had a number of PCs with turbo back in the day. All my computers of that era were built and not brand, I don't believe they had BIOS key shortcut for turbo on/off. Also they did not drop down to XT speed as far as I remember. 100% …

Ok, I thought "turbo" are versions from 10 MHz above, which my board does not support. If NEC V20 is almost twice as fast in some things on same clock, does that mean V20 at 8MHz is almost twice as fast as Fujitsu or Siemens 4.77MHz? I have them both in M19. I haven't explored much, but these chips …

The original Prehistorik Titus 1991 should run on an XT and has a VGA mode, requires DOS 3.0+ and 512k ram from the readme but no cpu mentioned... am currently rebuilding my xt psu so cannot try it. It runs on 4.77MHz 512kB CGA well. Prehistorik 2 requires a 286. Hi there, there's also an important …

Resolved. That PLA in the corner does contain the "configuration" for PVC2 thus it bares some registers from being written to in my onboard case. But removing it and PVC2 too, makes the onboard card go away. Which is what I was looking for.

Wanted to open a thread, found it already existing. I thought VGA on slowest XT is a convenience upgrade for monitor connection, turns out it works as good or better than CGA. Especially considering the fact that CGA universe is not that cohesive. Machines released after EGA was born tend to have …

Hello, I have this graphics card embedded on a motherboard of XT machine. I'm interested in disabling CGA/Plantronics support on the card. The PVC2 chips supports different standards (MDA, Herc, CGA/Plantronics), yet in my machine it doesn't do Hercules, while also being on some ISA Hercules clones. …