Function 30h Get DOS Version Number
Return DOS version and/or user number
entry AH 30h
return AH minor version number (i.e., DOS 2.10 returns AX = 0A02h)
AL major version number
BH OEM ID number
00h IBM
16h DEC (others not known)
BL:CX 24-bit user serial number
note 1) If AL returns a major version number of zero, the DOS version is
below 1.28 for MSDOS and below 2.00 for PCDOS.
2) IBM PC-DOS always returns 0000h in BX and CX.
3) OS/2 v1.0 Compatibility Box returns a value of 10 for major version.
4) Due to the OS/2 return and the fact that some European versions of DOS
carry higher version numbers than IBM's DOS, utilities which check
for a DOS version should not abort if a higher version than required
is found unless some specific problems are known.
file: /Techref/INT/21f/30.htm, 0KB, , updated: 1999/2/20 11:26, local time: 2024/10/3 13:13,
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