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  1. Bit less than that. IBM's initial release of the...

    Bit less than that. IBM's initial release of the 8087 cost $260 and that included a replacement 8088. By 1987, the 8087 was barely more than $100.
  2. MS Flight Simulator does not support any math...

    MS Flight Simulator does not support any math coprocessor. https://jeffpar.github.io/kbarchive/kb/021/Q21392/ Falcon 3.0 seems to have been the first flight simulator to support a math coprocessor...
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    If it is going into an interpreter, speed...

    If it is going into an interpreter, speed probably won't be critical but size might. The OP hasn't mentioned how limited is the 8088 system the code needs to run on.
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    It would be difficult to get a 486 or earlier...

    It would be difficult to get a 486 or earlier system to use more power than that unless you have a giant CRT. The ST-4096 hard drive could use up to 50 watts; 486 uses less than 10 watts; chipset...
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    Least amount should be zero aka "off." Maximum...

    Least amount should be zero aka "off."

    Maximum power draw would be about 5w for 8088 and 12" color monitor could range up to about 50w. Don't plug big CRTs into the second connector on the...
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    Group of routines: I know I had a book on it but...

    Group of routines: I know I had a book on it but I can't find it.

    PC Tech Journal did a three part article on floating point math with code written in 8086 assembly. That would be OCT thru DEC...
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    I have written my own floating point routines....

    I have written my own floating point routines. Validating those was tedious. I don't know how long the OP plans to take before having code that can be shown to others. If stuck, having a working...
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    Bywater Basic is a portable open source BASIC...

    Bywater Basic is a portable open source BASIC interpreter written in C. Version 1 was public domain and MS-DOS. Earlier versions were smaller and thus better for 8088 usage. The version 2 math code...
  9. It was better than the original line of...

    It was better than the original line of cache-less Celerons. The 66MHz bus speed versions were good chips for the inexpensive business machine market: stable stodgy and cheap. The higher bus speed...
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    Dell Latitude D630 was a Core2 Duo laptop with...

    Dell Latitude D630 was a Core2 Duo laptop with serial port but no parallel port. I think some of the Dell and Thinkpad docking stations had parallel, serial, and PS/2 ports even much later. I just...
  11. The PCJr Patch is listed...

    The PCJr Patch is listed https://gopherproxy.meulie.net/sdf.org/0/computers/pcjr/misc/FILES I don't see a way to download the JR8087 patch and I have no idea if that patch is even close to what the...
  12. DoD is on cartridge right? I have little...

    DoD is on cartridge right? I have little experience with CoCo cartridges. Page 56 of the service manual points lists some checks. For example, making sure the data and address lines connect between...
  13. The PCJr seems to have needed a BIOS patch for...

    The PCJr seems to have needed a BIOS patch for the 8087 to work so some systems may be harder than I expected. I wish I could find illustrations of the various 8088+8087 boards that plugged into the...
  14. Well, if you really want a copy, check with...

    Well, if you really want a copy, check with LearningAlly (ORG) which used to be Recording for the Blind & Dyslexic and the source of the audio book version of MS manuals. I don't see the NT manual in...
  15. The connection is well documented so adding a...

    The connection is well documented so adding a board should be relatively easy.

    DOS and BIOS don't do anything to handle the NMI. Careless 8087 programming is an excellent method of locking a...
  16. Can you save simple BASIC files to cassette? And...

    Can you save simple BASIC files to cassette? And load them back? There are a lot of potential problems so simplify to just making sure the tape recorder and CoCo work.
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    I have no idea. They were wrapped around...

    I have no idea. They were wrapped around unbranded floppy disks in a large storage box. I think they felt a lot thinner than the floppy bags used by IBM.
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    I have cleared out a floppy disk box where all...

    I have cleared out a floppy disk box where all the little bags had turned yellow and brittle. Shutters are nice but adding contaminants to the mix isn't helpful.

    Online, I see a few places...
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    What I remember was that the Packard Bell...

    What I remember was that the Packard Bell Pentiums with no L2 cache lost about 20% of the performance compared with the same clock speed Pentium with L2 cache. IIRC, most of the good performing...
  20. I think the floppy drives with that sticker were...

    I think the floppy drives with that sticker were made by YE-DATA so that would likely be a YD-580 which is the 360k variant of the YD-380. I don't know how to tell the various sub-models apart. I...
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    Lead free solders have been around for decades....

    Lead free solders have been around for decades. The laws mandating the use of lead free solder were passed a bit more than 10 years ago. Everything made in China or expected to be sold in either...
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    Download software: http://poisk1.chat.ru/...

    Download software:
    http://poisk1.chat.ru/
    http://poisk-pc.narod.ru/poisk.htm 4POISK-1 (RAR file) shows a diagram of the RGB connector pinout as PICT-07

    There was also a collection of cassette...
  23. http://www.tcocd.de/Pictures/Peripheral/Logitech/L...

    http://www.tcocd.de/Pictures/Peripheral/Logitech/Logitech.shtml has a lot more devices. Some have logos; some don't. I expect that the logic board will have a Logi imprint on it or on a chip but I...
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    The external Quick Disk enclosure with a serial...

    The external Quick Disk enclosure with a serial connection was fairly common for 8-bit systems. I know of ones for MSX and Sinclair Spectrum (multiple manufacturers with incompatible cables). The...
  25. I have a P7 mouse. It has a logo of circle inside...

    I have a P7 mouse. It has a logo of circle inside a square with one quadrant filled in, all in grey next to the word Logitech. The early Trackman logo I recall was grey like...
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