INT 15 - DESQview - QEXT.SYS - INSTALLATION CHECK AX = 11DEh Return: CF clear if installed AX = segment at which QEXT.SYS is located Desc: QEXT.SYS is Quarterdeck's HMAsee High Memory Area manager for DESQview; more recent versions also implement the XMSsee Extended Memory Specification standard Note: a private entry point (see #00434) may be found by searching the beginning of the returned segment for the signature string "QUARTERDECK EXTENDED MEMORY MANAGER 286"; the word immediately prior to the signature contains the QEXT version number in BCD(Binary Coded Decimal) A method of data storage where two decimal digits are stored in each byte, one in the upper four bits and the other in the lower four bits. Since only the values 0 through 9 are used in each half of a byte, BCD values can be read as decimal numbers on a hexadecimal display of memory or a file., and the word prior to that contains the offset within the QEXT code segment of the private entry point SeeAlso: INT 2F/AX=4310h"XMSsee Extended Memory Specification",INT 67/AH=3Fh (Table 00434) Call QEXT.SYS private entry point with: AH = 00h ??? AH = nonzero ???