PC DOS v1.10 / MS DOS 1.25 (Z-DOS)

• Released in May 1982.
• OEM IBM Corporation PC-DOS (first release version).
• OEM Zenith Computer Corporation Z-DOS.
• Was standard for over a year.
• Added support for 2-sided (double-sided), 8-sector, 320K (5.25") diskette drives (the end of the "flippy" where you could notch both edges of a diskette and flip it over to use the other side to store data).
• Fundamental DOS services stabilized (debugged).
• Uses DOS Functions 2eH and below.
• Commands introduced:
  • DEL
  • EXE2BIN
  • REN
• Commands enhanced:
  • CHKDSK
  • DATE, now internal COMMAND.COM command.
  • DEBUG
  • DISKCOMP
  • DISKCOPY
  • ERASE
  • FORMAT
  • LINK
  • MODE Configure Printer
  • MODE Configure Serial Port
  • MODE Redirect Printing
  • MODE Set Display Mode
  • TIME, now internal COMMAND.COM command.

none.

none.

none.

Filelist