Article · Wikipedia archive · Last revised May 30, 2026

PTDOS

PTDOS or Processor Technology Disk Operating System is an operating system created in the late 1970s for computers using the Intel 8080 microprocessor and the Processor Technology Helios II Disk Memory System.

Last revised
May 30, 2026
Read time
≈ 1 min
Length
138 w
Citations
3
Source
Wikipedia ↗
PTDOS
DeveloperProcessor Technology
OS familyDOS
Working stateHistoric, Unsupported
Initial release1978 (1978)1
Available inEnglish
Package managerN/A
Supported platformsIntel 8080
Default
user interface		Command-line interface
LicenseProprietary

PTDOS or Processor Technology Disk Operating System is an operating system created in the late 1970s for computers using the Intel 8080 microprocessor and the Processor Technology Helios II Disk Memory System.2

Commands

The following list of commands is supported by PTDOS 1.4.2

  • EDIT
  • EDT3
  • ASSM
  • DEBUG
  • DO
  • DISKCOPY
  • RECOVER
  • FILES
  • FREE?
  • SYST
  • OPEN?
  • COPY
  • IMAGE
  • BLDUTIL
  • EXTRACT
  • KILL
  • RENAME
  • RETYPE
  • REATR
  • XREF
  • DUMP
  • PRINT
  • RNUM
  • SAVE
  • GET
  • CREATE
  • OPEN
  • READ
  • WRITE
  • CLOSE
  • SPACE
  • RANDOM
  • SEEK
  • ENDF
  • SETIN
  • SETOUT
  • SET
  • EXEC
  • ZIP
  • CONFIGR
  • OUT
  • BASC5
  • FOCAL
  • TREK80
References

References

  1. Stan Sokolow (ed.). "SOLUS NEWS" (PDF). Retrieved January 30, 2020.
  2. Leaflet for the Helios II system and PTDOS
External links
  • Sol 20 site – This computer used PTDOS when a Helios II disk drive was installed.