INT 21 - Rational Systems DOS/4GW - GET VERSION??? AH = FFh DH = 00h DL = ??? (78h seen) Return: CF clear EAX = 4734FFFFh (high word is byte-swapped "4G") if DOS/4G installed Note: Quarterdeck's DESQview/X X Toolkit library uses this call to determine whether the direct-mapped linear 4GB segment's selector is 34h or 38h SeeAlso: INT 21/AH=FFh/DH=00h"DOS/4GW"
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