Recent content by jh1523

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...