en:docs:dos:api:int21:2b

Note: This API call is for DOS and Win16 personality only. Use Family API for portability.

2018/09/07 05:04 · prokushev · 0 Comments

Int 21H, AH=2BH

Version

1 and higher

Brief

SET SYSTEM DATE

Family API

Input

  • AH = 2Bh
  • CX = year (1980-2099)
  • DH = month (1-12)
  • DL = day (1-31)

Return

  • AL = status
    • 00h successful
    • FFh invalid date, system date unchanged

Notes

DOS 3.3+ also sets CMOS clock; due to the limitations of the CLOCK$ driver interface, the CMOS time is also updated to the current DOS time (which is the BIOS time-of-day clock with the default CLOCK$ driver)

See also

AH=2Ah,AH=2Dh,INT 1A/AH=05h

Note

2018/09/04 17:23 · prokushev · 0 Comments