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I have recently obtained a Biostar MB-1212C motherboard, 286 with SCAT chipset (82c235), comes with a 12MHz CPU and 1M of memory in DIP sockets. It also has 4 SIPP sockets for up to 4MB memory. There is no jumper to select between the DIP and the SIPP. Here is the entry in TH99...

I've started a little while ago building from parts an Alpha machine, which I eventually want to have as a dual-boot, NT 4.0 and Linux. It's based on a DEC AlphaPC 164 motherboard with a 500MHz 21164A CPU, and I currently have in it 512MB of parity FPM RAM (8x64MB SIMMs). Besides some issues...

I have just picked up on ebay a 286 motherboard from a WysePC 286 AT clone, WY-2200-01 and its matching power supply (as it has nonstandard power connector) There's precious little information about this system on the net. All I could find is a brochure...

So I found recently on ebay a nice combo of a XT clone motherboard (very similar but not exactly the same as this one http://www.uncreativelabs.de/th99/m/U-Z/33657.htm) which is completely populated with 640K RAM and has 5 out of 8 BIOS sockets filled with 2764 chips (one labeled BIOS and the...

My latest acquisitions in the area of ISA memory cards have brought a few cool items. I think I have one mostly figured out, but the other 2 are a mystery. Please share any information that you may have about them! 1. 8-bit ISA flash card marked "Promdisk V disk emulator" copyright 1995 MCSI...

I am trying to maximize the amount of upper memory that I can get on this 286 system, and have a question or two about backfilling memory with a Rampage board. First, the hardware. This is the motherboard: http://artofhacking.com/th99/m/U-Z/30583.htm I've installed 4M of memory in banks 2 and 3...

I have a large amount of 1Mx1 chips, 511000-compatible, the exact part number is M5M41002BP-80, datasheet http://pdf.datasheetarchive.com/datasheetsmain/Datasheets-111/DSAP0024066.pdf They are unused, still packed in the original tubes. I need 256kx1 DRAM chips to populate a couple of memory...

I've been playing lately a lot with my old motherboards, and I can't help but noticing some oddities. The one I'm submitting here happens on a 286/12 motherboard, here it is on TH99: http://artofhacking.com/th99/m/U-Z/30583.htm This motherboard has 1M RAM on-board currently. It has 8 sockets...

I'm reading through Intel's Introduction to the iAPX 286 from 1982, and on page 2-8 it touts how the 286 is ideally suited for multi-processor systems. This got me thinking: were there ever any multi-processor 286 systems (not necessarily IBM PC-compatible, but any architecture)? I'm not aware...

See picture at the bottom. Double rows of 30 round pins. Is this a precursor of 30-pin SIMM connectors? Could some sort of adapter be made to use regular 30-pin SIMMs? FWIW this is a 286 clone motherboard.

Recent laptops only come with USB ports for expansion. I am looking for a way to add a real parallel port to such a laptop. For serial ports it's easy, there are numerous choices for USB-to-real-serial-complete-with-control-signals adapters. I have many of those. But I have been unable to find...

I recently acquired a motherboard, model "M326 v5.5" similar to http://artofhacking.com/th99/m/U-Z/32353.htm; I'm wondering if it has fake cache, as all of the signs are there: soldered cache chips instead of socketed (4+tag) and chipset that has sticky labels on top (SARC RC4018A4) instead of...

... or not, depending on your point of view. The fundamental question is: can a modern PC run DOS, and DOS-based programs natively without any emulation? My test machine: relatively recent (less than2 years old) laptop with core i7 CPU, 8GB RAM etc Here's the manufacturer config/order page to...

I'm looking for a datasheet for this chip MC146814AP for a 286 motherboard I'm trying to repair. I believe the chip is defective but don't know exactly what its functions are. I couldn't find much information by googling; there are some mentions that it may be a RTC, but I wonder if it has other...

It's the first time I run into something like this, and I'm a little bit stumped. I acquired recently a 486 motherboard, here it is on TH99: http://stason.org/TULARC/pc/motherboards/A/ACER-INC-486-VI15G.html#.U4uGHIXeLFk I am having the following problem with it: I can't make any FDD...

I've found very little information about this chip; it's a 387-class coprocessor, there are pictures of it here and there but no real information, e.g. how it is different from the Cyrix FasMath 83D87 or 387+ I'm asking this because I'm refreshing/rebuilding a 386DX system, and I have the...

I've been playing a bit with a Rampage 286 card - precisely this one: http://artofhacking.com/th99/i/A-B/52501.htm According to the TH99 page, it has switch settings to set memory size all the way down to 128k. That would mean one bank (2x9 chips) populated with 2164 chips. The documentation...

Just received a lot of 386 motherboards off ebay - very cheap because it's a mystery lot, no names or specs. One of them I could identify easily, but the other defies me. Perhaps someone here could help me identify it. Here is the picture, saved from ebay: It has the following markings...

Saw this on Slashdot: http://www.youtube.com/watch?v=Ht96HJ01SE4 Very nice. "Atari 800XL was used for the lead piano/organ sound, Texas Instruments TI-99/4a as lead guitar, 8 Inch Floppy Disk as Bass, 3.5 inch Hard drive as the gong, HP ScanJet 3C was used for all vocals. Please note I had...

Has anyone ever seen one of these? It's a 386DX mobo, which (as per the docs I found online) can come with either a 20, 25 or 33 MHz CPU. I don't know if the CPU is soldered or socketed though. The reason I'm asking is because I found one of these online pretty cheap, but have no picture of...