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X-Hacker.org- Ralf Brown's Interrupt List (Part 1,2) - int 21 - desqview - installation check
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INT 21 - DESQview - INSTALLATION CHECK
AH = 2Bh
AL = subfunction (DV v2.00+)
01h get version
Return: BX = version (BH = major, BL = minor)
Note: early copies of v2.00 return 0002h
02h get shadow buffer info, and start shadowing
Return: BH = rows in shadow buffer
BL = columns in shadow buffer
DX = segment of shadow buffer
04h get shadow buffer info
Return: BH = rows in shadow buffer
BL = columns in shadow buffer
DX = segment of shadow buffer
05h stop shadowing
CX = 4445h ('DE')
DX = 5351h ('SQ')
Return: AL = FFh if DESQview not installed
Note: in DESQview v1.x, there were no subfunctions; this call only identified
whether or not DESQview was loaded
SeeAlso: INT 10/AH=FEh,FFh
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