30H DOS version number 3305H ID of boot drive 3306H actual DOS version CONFIG start up menu choice 59H recent error information COMSPEC COMMAND.COM load path 2aH current date INT 1cH detect timer tick 2cH current time INT 28H detect DOS Idle state 19H current default disk INT 11H BIOS equipment list 47H current default directory INT 15H c0H BIOS configuration info 2fH current DTA address INT 15H 5300H APM installed state 34H InDOS addr (reentrancy state) 35H current value of an INT vector INT 2fH 1700H Windows Enh386 active 51H current PSP (active program) INT 2fH 1700H Windows/Clipboard state 52H List Of Lists (misc DOS vars) INT 2fH 1687H DPMI installed state INT 2fH 4b02H Dosshell installed state 54H disk verify mode 3300H Ctrl-Break checking state INT 33H 0000H mouse installed state ────────────────────────────────────────────────────────────────────────────── Service Groups DOS Functions BIOS Data Area Data Structures API Index