X-Hacker.org- Ralf Brown's Interrupt List (Part 1,2) - int 21 - dos 2+

Click above to get retro games delivered to your door ever month! X-Hacker.org- Ralf Brown's Interrupt List (Part 1,2) - int 21 - dos 2+ - get dos version

[<<Previous Entry] [^^Up^^] [Next Entry>>] [Menu] [About The Guide]

INT 21 - DOS 2+ - GET DOS VERSION
        AH = 30h
Return: AL = major version number (00h for DOS 1.x)
        AH = minor version number
        BH = OEM number
            00h IBM
            16h DEC
            99h STARLITE architecture (OEM DOS, NETWORK DOS, SMP DOS)
            FFh Phoenix
        BL:CX = 24-bit user number
Notes:  the OS/2 Compatibility Box returns 0Ah for the major version
        DOS 4.01 and 4.02 identify themselves as version 4.00

Online resources provided by: http://www.X-Hacker.org --- NG 2 HTML conversion by Dave Pearson