www.delorie.com/djgpp/doc/rbinter/20.html   search  
Int 0x21, AH=0x20

2120 INT 21 - DOS 1+ - NULL FUNCTION FOR CP/M COMPATIBILITY
2120 INT 21 - S/DOS 1.0+ & PTS-DOS 6.51+ - GET OEM REVISION
212080 INT 21 - VIRUS - "New-Year" - INSTALLATION CHECK

  webmaster   donations   bookstore     delorie software   privacy  
  Copyright © 2000   by Ralf Brown     Updated Jul 2000  

Please take a moment to fill out this visitor survey
You can help support this site by visiting the advertisers that sponsor it! (only once each, though)