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Hello everybody, I'm trying to figure out how Windows 9x loads its components and drivers into memory. Experimenting with UMBPCI, I noticed that Windows always takes all the upper memory and it's usually VMM32 that consumes it all. But if I don't load UMBPCI, VMM32 only takes a few bytes of...

Are there any interesting ICs on this board? What's inside of it? Does anybody have an idea of what it may contain?

Hello guys, I'm going through scrap and occasionally I find EEPROMS, for example an ATMEL AT27C010, MX27C1000, and many more. They look normal, like any other EEPROM. While I can dump the roms without problems, I can't write a single bit into the chips. I assume there's some sort of lock. Is...

Greetings friends, I have this 6571 motherboard with its proprietary PSU (nice Rubycon caps), it has no power switch but a proprietary 3-pin connector that plugs into the MB. This connector has 3 cables, colored black, white and red. I measured it when the PSU is on, and red is 5v, black...

Hello fellow vintage computer enthusiasts, I can buy a CF to IDE adapter for regular computers (40-pin) for a good price, but I have a couple of laptops from the late 90s that have a 44-pin female IDE port. My question is, is it possible to create an adapter and use one of these CF-IDE 40-pin...

When installing a fresh DOS computer, I usually create scripts and place them in the C:\BIN directory, and add it to the PATH. So for instance, let's say I want to run Norton Commander easily (it could be anything else, any program or game that requires certain files) then I create the script...

Hello folks, I recently got this motherboard, and there's very little information around about this computer, but I could identify it as ACTION TOWER 3000. I played around a lot with it, managed to get an Am5x86 working at 150MHz stable, but there was this problem with the CF cards and with...

Hello fellows, First, this is my setup: PcChips M571 with the SiS 5597 chipset (as reported by speedsys) CPU is Pentium 233 MMX @291 MHz (83x3.5, 2.9v) I can use either 64, 128 or 256 MB of RAM memory According to this website the Maximum Cacheable DRAM Area is 128MB According to a little...

Is there a way to prevent Win9X to always check the floppy drive (default driver directory) when you try to select the location of a new driver? This is something I've been wondering for a long time.

I recently got this YE Data YD-380. I was trying to make it work with 360K disks. I tried to find documentation about the jumpers but couldn't, except this service manual that was of little help http://electrickery.hosting.philpem.me.uk/comp/divcomp/doc/YE_Data_YD-380_5.25inchHHHDFloppy.pdf...

Hello friends, I recently came across a collection of old floppy disk images. Most of them saved with EPLCopy, which means I had to find a way to convert them into regular raw images. The problem is that many of these floppy images are infected with very old viruses. Jerusalem, Brain, Cascade...

Hi folks, I recently picked up this joystick, standard DB-15 connector. The only info I can read is PAT. NO. 26799 It doesn't work on MS-DOS nor Win9x. According to the only bit of info I could find on the web it is for Commodore, Amiga, Atari, Sinclair ZX, Spectrum, etc. I thought those...

I'm putting together a Pentium SY022 with a Gigabyte GA-5AX (ATX only), and I'll be using old sound cards on it, so I need an ATX PSU with the white -5v cable. I have the right PSU with the -5v white cable (let's call it PSU1), but it has a very noisy fan. I have another ATX PSU (PSU2) without...

I'm testing a lot of 30-pin SIMMs for errors using Memtest-86 v3.4. It's the only software that I'm aware of that works on this platform and as far as I can tell it does its job fine, but I'm not sure. I haven't found a single failed module yet. The only bad thing is that it takes a lot of time...

Hello people, I got this motherboard not long ago and at first sight I could notice it was heavily damaged by a battery leak. Thankfully it booted, but the keyboard wasn't working. So I cleaned the leak which left some traces exposed. At least one trace was damaged, one that goes from the...

Hello guys! I'm kind of a beginner in the vintage computers world, although I have been using computers since I was very little in the early 90s. I really dig playing with old hardware and software and I like your community very much. So I got this 286 motherboard. These are some pictures I...

Hello, I'm trying to use a MIDI Keyboard Casio PX-310 with a Sound Blaster 16 ISA no PnP, so that when I play the keyboard, the SB16 FM Synth plays. The system is Win98SE (that means that MS-DOS 7.11 is also an alternative). I tried with MIDI-OX to some degree of success but I'd like to know...