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$10 386/486 (Cyrix Cx486DLC installed + math co-processor) adventures

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    #16
    Good thing I archived the old 203MB Maxtor drive as that had the Cyrix software for the cache on there. I'll try that out and see what happens. Had a hiccup with the Diamond SpeedSTAR VGA rev. C6 (ET4000AX) card as it wasn't getting detected (got detected once and that was it), and after changing the DIP switch #3 to OFF, it started to work (backed up the ROMs as well to be safe and make spare ones in case the original ROMs die mysteriously). Also got 8MB SIMM-30 Parity 70ns (8x 1MB) for the system as the RAM might need to be replaced (the 386 DX-33 has a 32-bit instruction bug, which is causing HIMEM to act crazy if /testmemn is in place in config.sys, but Memtest86+ v4.10 reports no issues, which is weird), but better to have spare RAM in case the original 4MB SIMM-30 (technically SIMM-32, but the first and last pin are not connected to anything, except for common ground) stops working one day.
    Current retro systems:
    386/486DLC, AMS NotePro Plus DSTN
    Packard Bell Pack-Mate 28 Plus
    Toshiba Satellite Pro 410CDT, 2x IBM ThinkPad 380D (both TFT)
    iMac G3/600 Graphite, iMac G4/800 Lampshade
    YouTube channel: https://www.youtube.com/c/RetroPCUser

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      #17
      An update on the system: I kept the 486DLC-33GP installed and swapped the I/O controller card with a Promise EIDE Pro Super I/O card and removed the XT-IDE Universal BIOS from the 3Com EtherLink III 3C509TP ISA card and needs an HDD reformat, but I'm going to copy the files over from the HDD to my laptop, format the HDD, and copy the files back over to the HDD.
      Current retro systems:
      386/486DLC, AMS NotePro Plus DSTN
      Packard Bell Pack-Mate 28 Plus
      Toshiba Satellite Pro 410CDT, 2x IBM ThinkPad 380D (both TFT)
      iMac G3/600 Graphite, iMac G4/800 Lampshade
      YouTube channel: https://www.youtube.com/c/RetroPCUser

      Comment


        #18
        Update: got the files copied to my laptop's hard drive, reformatted the 4.3GB HDD, and copied the files over to the drive. I then swapped boards with the M326 V5.2 that had the Cyrix Cx486DLC-40GP and Cyrix FasMath 8D387-40GP installed, but that board would lock up and I believe it was because of the BIOS issues, but I'm not certain. I then swapped both the CPU and FPU from the 33MHz Cx486DLC-33GP and C&T 8D387-33 to the Cx486DLC-40GP and FasMath 8D387-40GP, and installed an 80MHz clock crystal to get the full 40MHz. Runs pretty well.
        Current retro systems:
        386/486DLC, AMS NotePro Plus DSTN
        Packard Bell Pack-Mate 28 Plus
        Toshiba Satellite Pro 410CDT, 2x IBM ThinkPad 380D (both TFT)
        iMac G3/600 Graphite, iMac G4/800 Lampshade
        YouTube channel: https://www.youtube.com/c/RetroPCUser

        Comment

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