INT 2F U - DOS Navigator II - INSTALLATION CHECK AX = 9900h Return: BX = 444Eh ('DN') if installed AX = number of DOS Navigator executions CL = child process exit code DX = version number (see #02965) Notes: old versions of DOS Navigator II always returned AH=1, while newer ones return AH=0 and store AL in the DN.FLG file Program: DOS Navigator is a multi-window shell for MS-DOS by RIT S.R.L. DOS Navigator™ is a registered trademark of RIT S.R.L. SeeAlso: AX=9901h,AX=9902h,AX=9903h,AX=9904h,AX=9905h,AX=9906h (Table 02965) Values for DOS Navigator II version code: 2100h version 1.35 2138h version 1.38 2141h version 1.41 2150h version 1.50