Welcome to RetroSys.

This site is an accumulation of subjects, experiences and information on retro computer systems and hardware with which I have experience.

Subjects in particular include:

• Digital Equipment Corporation PDP-11
• IBM System 360
• Cray Research Supercomputers
• Varian Data/Sperry 620i and V7X Minicomputers
• Historical Computer Magnetic Tape data preservation (9-track, QIC, 3480)
• SMD-interface Disk Drives and emulators (on the PDP-11 system)
• Software preservation
• Documentation preservation
• Morrow Designs Micro Decision minicomputer hardware and software
• Teletype Corporation Model 33 teleprinters
• 8-level Paper Tape storage
• SIMH Computer Simulators
• Historic Operating Systems
  • Cray COS
  • Cray UNICOS
  • UCB CSRG BSD Unix, both 4.3BSD and 2.11BSD
  • Hewlett-Packard MPE/IX 5.5
  • Hewlett-Packard HP2000 Time-shared BASIC
  • IBM CP-67/CMS
  • IBM OS 360
  • Mt Xinu More/BSD (4.3)
  • Mt Xinu MACH/386 (2.5/2.6 MSD)
  • Varian Data Vortex
  • VenturCom Venix-11 (For the PDP-11; Not the Venix/86 versions)