The important point is that the original VGA card uses 32-bit memory access (by using 8 chips providing 4 bits at 64kilo-addresses, so all chips together provide 32 bits at 64 kilo-addresses, for a total of 256KB). The Trident chips mostly support up to 1MB of RAM (the 9000i-3 might be a cost- …

Working now, populated all RAM to 512KB and for some reason it works now. Don't know why that would fix it, but it did, so just going to enjoy that my 10MHz XT Clone is now a lovely retro game machine and not going to dwell on it too much 😀

Very interesting. I guess it's playable in EGA but way too slow in VGA. Hard for me to test at the moment as my ISA VGA Card isn't working very well - but I did get it to run long enough for this quick video: https://youtu.be/_9lJ2kYgydI Looks like it's a touch slower, but not by much (I did have …

Hi all, Just wanted to share a little hack I made yesterday to the DIZZY.EXE file of Fantasy World Dizzy by Codemasters to allow it to select the EGA or VGA modes on a 8088/86 based machine. I don't really know anything about the structure of .EXE files or how best to document patches to old DOS …

Hi all, I've been testing a Trident TVGA9000i graphics card in my Xi8088 based computer, the https://github.com/moogway82/XTjr and it is doing some weird stuff. Details on the card are: Trident TVGA9000i-3 based with a 4.01E ROM. In an 8-bit ISA slot with jumpers set for 8-bit mode and Non- …

This is what I'm thinking, 8bit EGA is always slow, regardless of CPU speed, EGA Prince of Persia on an 8bit EGA is a slow game, regardless of whether it's on a 8088 or a 386. My thinking is that high Res EGA games was just very compromised games and never a great experience - you probably have …

I'd be really interested to see how EGA cards perform in 16bit, 286/386/486 computers that the CPU runs much faster than the bus to see how they perform. I built my own 10MHz 8088 pc and was a little disappointed with the performance of games using the EGA card and assumed it must be the CPU, but as …

Yup that was it: Virtek Int. Corp 3D-Ware Personal on PC Review Issue 49 Nov 1995! From this website it looks like it was also on PC Format CD 19: http://ronanphotog.dx.am/3d-Ware.htm Right, now I just need to spend aaages figuring out how to make the '95 3D game of my 13 year old dreams !! Thanks …

I think you mightve nailed it, I think it was 3D-Ware, Iooking at the covers of the magazine's that I could find I didn't think it was that late in 95, but it fits the bill. I'm downloading the iso now to see. It was more of an SDK than a point and click thing, I think that's why it eventually …

Hi all, I have a fond memory of a 3D game construction engine that was given away with the UK magazine PC Review sometime in 1995. Looking at the pictures of the issues I can see at archive.org and other sites, I think it was either issue 44 or 45 as a kid hey are missing and I regonised the others …

Hi all, I found my answer in the end USE!UMB is actually USE!UMBS and I found this video by Al's Geek Lab on YouTube a really nice into to using it on an XT class machine, he also uses the Monotech ram card. https://youtu.be/bdRXqfhpV1Q I got my machine to show 624k of conventional free, so v happy …

Very sorry to re-open an old thread, but sounds like BloodyCactus had a nice way of using UMB with an 8088 class PC - however Googling "USE!UMB" I can't find any references to this method (only the HIMEM.SYS and EMM386 which needs a 286 class PC) - can you give more details on how to set this up? …

Hi MMaximus! Thanks for getting back to me. My motherboard is a homemade PCB, based on the Xi8088. I have a simple Wait state generator, but it's only for IO R/W and a minimum IORDY wait states and I've not implemented any memory wait states and I'm pretty sure that's my problem. Today I got my 24 …

Hi MMaximus, sorry to comment on an old thread, but I'm building my own 8088 (V20) based PC and I've got a PEGA2A based EGA card which works great at the normal 4.77MHz, but has post issues at 13.33 MHz Turbo mode I'm trying to implement. On your fast PCs, do you know what the ISA speed is on those …

Hi there, Sorry to bomb this thread, but in the interests of digital preservation, I thought I'd add an EGA card I was working on last night to the list incase anyone is looking for ROMs. Manufacturer/Identifier: Juko ST (NEL Electronics) Chipset: UDL C3 BIOS-String: NEL INTERNATIONAL 1989 IBM EGA …