DOS/32 Advanced DOS Extender - Documentation: Programmer's Reference []

DOS/32 Advanced DOS Extender - Programmer's Reference

4.01 - VGA function 1Bh - Read Functionality Information

In:	AH = 1Bh EBX = 0000h (implementation type) ES:EDI = pointer to 64 byte buffer
Out:	AL = 1Bh (if function supported by VGA BIOS) EBX = implementation type ES:EDI = pointer to buffer filled with VGA BIOS information

Notes:

a) This call can be used to determine whether a VGA BIOS is supported by the Video BIOS in ROM. If function returns AL=1Bh, the machine is VGA compatible. To determine the presence of the VGA BIOS you can also call VGA BIOS functions AX=1A00h and AH=1Ch.