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  1. You got a fairly rare math coprocessor. C&T...

    You got a fairly rare math coprocessor. C&T wasn't very popular because it was short lived.

    If you want to play speed sensitive games, DLC might not be the best choice. Maybe a standard 386-33...
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    I always see Magitronic motherboards for sale...

    I always see Magitronic motherboards for sale (often in box). I have never seen an actual Magitronic PC though. Seems kind of generic. What happened to the case badge?
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    Wow! The 1024 VLB was a real thing. I've seen 3rd...

    Wow! The 1024 VLB was a real thing. I've seen 3rd parties mention it, but I always assumed it must have been a typo. I really want one now.

    *edit*

    Apparently I discovered this 6 years ago but I...
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    There should be a VGA driver for 640x400x256 (400...

    There should be a VGA driver for 640x400x256 (400 lines, not 480), which fits into 256kb.
    Since you have an AT system, why not upgrade to a 16-bit VGA card?
  5. AMI Enterprise III and IV are pretty darn similar...

    AMI Enterprise III and IV are pretty darn similar feature wise, and they both use the same SiS chipset. The only major differences that I can see is that the III is full size AT, and the IV has...
  6. Looks like DS1485 is available as both DIP and...

    Looks like DS1485 is available as both DIP and SOIC, however the DIP version is only 600mil, whereas the DS1488 is 740mil, so you'd still need an adapter for it....plus it also requires a crystal and...
  7. Is the DS1485 a drop in replacement for a DS1488?...

    Is the DS1485 a drop in replacement for a DS1488? I have Nice SuperEISA that uses a DS1488 and don't really feel like drilling into it.

    The SCSI controller looks an awful lot like the VLB AMI...
  8. Was the $950 MCA sound blaster at least the pro...

    Was the $950 MCA sound blaster at least the pro version?
  9. I am pretty certain that the Boca Research...

    I am pretty certain that the Boca Research BocaRAM AT Plus does as well. I'll try to verify that with the manual though.
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    The intergrated video on this system should be...

    The intergrated video on this system should be local bus, which would make it quite a bit faster than any ISA card you could get for the system. The ET4000/32i should support 16.7 million colours at...
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    Well, that's good to know! I checked my 256kb...

    Well, that's good to know!
    I checked my 256kb SIMMs. I used to have a lot, but it seems at some point in the past I got rid of most of them. All I have at the moment are eight matching 3-chip 256kb...
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    Will do, thanks. I actually haven't tried...

    Will do, thanks.

    I actually haven't tried standard 256k SIMMs yet, but I have some so I will give it a shot. Given IBM's history of using non-standard 30 and 72-pin SIMMs I'm not confident it will...
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    5162 XT/286 SIMMs

    I seem to recall somebody had figured out a way to modify standard 256kb SIMMs to work in the 5162. Does anyone remember the link to the post that describes how to do it?
  14. Pretty much every AMI BIOS of that period...

    Pretty much every AMI BIOS of that period displayed a message that says press delete to enter setup during POST.
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    What's clear from the first document I linked to...

    What's clear from the first document I linked to is that this system is not using a 5170 motherboard, and it's not even completely AT compatible as claimed because some signals are missing from the...
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    I read a little about IBM 7552 in a copy of a...

    I read a little about IBM 7552 in a copy of a document I found on Google Books. It sounds like it is an MCA/ISA hybrid, so it may not have an AT motherboard afterall.
    ...
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    Do you have any sources for the existence of the...

    Do you have any sources for the existence of the 10MHz AT variant? I've never heard of this before, except for the existence of some prototypes. I have seen IBM made "Turbo" AT motherboards listed on...
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    I had a similar issue a couple of days ago with a...

    I had a similar issue a couple of days ago with a Type 3 board, at least with the original BIOS chips. I was not able to get Mach64 VRAM, Mach32 VRAM, CL GD5434 or S3 805i to display a picture at...
  19. Why specifically these two?

    Why specifically these two?
  20. I've seen a few loose ones go on eBay for $200....

    I've seen a few loose ones go on eBay for $200. $300 is sadly a fair price for a NIB example.

    The only way you're going to get one for cheap is if the seller doesn't know what they have. I picked...
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    I'd say definitely worth looking into, and always...

    I'd say definitely worth looking into, and always worth the effort!
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    I think the sales brochure for the Toshiba T1200...

    I think the sales brochure for the Toshiba T1200 laptop mentions a socket for an 80C87 math coprocessor. No idea if it was just a typo, or perhaps a socket for a product that never materialized.
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    Really? Can you give me an example of such a...

    Really? Can you give me an example of such a board?

    As far as I have seen, 8087s from Cyrix and AMD basically do not exist. I think both of these companies and NEC attempted to clone one, but were...
  24. I am pretty sure the first 486s were the DX 25...

    I am pretty sure the first 486s were the DX 25 and 33. Wikipedia reports a 20MHz version, but I think it might be an error. Anyone have proof?

    As far as I know, the 16 and 20MHz parts were only...
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    I can't speak for all SB16s, but my 2230 line out...

    I can't speak for all SB16s, but my 2230 line out had a fairly audible hum. Not good.
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