SFD-1001 [#6]

 

SFD-1001

Serial: GA4 005619

The SFD 1001 is a single-drive, low profile version of the better known 8250 IEEE-488 disk drive capable of storing 1MB per floppy disk, powered by CBM DOS 2.7

  • total capacity: 1.066.496 bytes per disk (4133 blocks)
  • coding: GCR
  • format:
    • 154 tracks (77 per side)
    • 23-29 sectors per track
    • 256 bytes per sector
  • DOS: 2.7
  • ROM: 16Kb DOS, 2Kb GCR, 2Kb FDC-ROM
  • interface: IEEE 488
  • 2x 6502: CPU
  • 2x 6532: RIOT
  • 1x 6522: VIA
  • 1x 6530: MOS 901885-04: RAM, ROM, I/O, Timer RRIOT
  • 8x 2114: 4Kb RAM
  • disks used: standard 5,25″ DS-QD, 100TPI

work performed:

  • completely disassembled and cleaned
  • motor PCB recapped, damaged traces fixed
  • floppy mechanics cleaned and lubed
  • r/w heads cleaned

known issues:

  • slightly discolored case

 

Damage Control: