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INT 33 - Mouse Systems MOUSE DRIVER - POPUP.COM - INSTALLATION CHECK
AX = 0070h
BX = ABCDh
Return: AX = ABCDh if installed
BX:CX -> data structure (see below)
Notes: this function is also supported by the Genius Mouse 9.06 driver
the v7.01 POPUP.COM and menu drivers also check for the signature
CDh ABh BAh DCh at offset -2Ch from the interrupt handler
if POPUP is not loaded, the returned data structure contains the proper
signature at offset 00h, but not at offset 08h
Format of data structure:
Offset Size Description
00h WORD signature ABCDh
02h DWORD pointer to info structure???
06h 2 BYTEs ???
08h WORD signature ABCDh
Format of info structure:
Offset Size Description
00h WORD driver version
02h 8 BYTEs ???
0Ah WORD segment of ???
???
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