My Vintage Computer Virtual Museum and blog page.

Generic 486

My Generic 486 (built in its current form in 2013)

  • i80486 DX-33 (in FIC mother board)
  • 8MB RAM
  • AHA-1522A SCSI Card
  • 1GB Quantum Prodrive SCSI hard drive
  • PD/CD-Rom drive (kind of a precursor to CD-R and DVD-RAM)
  • 5.25″ 360K floppy (used to make disks for older PCs)
  • 3.5″ 1.44MB floppy
  • Full Length COM/LPT/Floppy/MFM card, using mostly just for COM/LPT ports, but nice to have in place to test MFM hard drives too.
  • Sound Blaster 16 (CT4170)
  • 3C509 10-Base-T NIC
  • Trident VGA (512k)
  • MS-DOS 6.22 & Windows 3.1
  • ALT12887 discrete realtime circuit in place of failed Dallas RTC module.

I’ve picked up a PCChips M919 board (with 256k of REAL cache), I plan to upgrade this machine with it. PCChips may be infamous for cheating people on cache memory, and general cheapness, but the M919 is probably one of the most overclockable 486 boards out there.  I will be testing a few different CPUs in this, an AMD 5×86 133, a Cyrix 5×86 100GP, and a Pentium Overdrive 83, I plan to see which one runs the fastest, I am betting the Cyrix with it’s cache and branch prediction might edge out the win, at stock speeds, but I bet the AMD wins on overclocking, not really sure how the POD will perform.

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