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AX = C000h
Return:
AL = status 00h not installed, OK to install FFh installed DS = segment of resident code
Program: TSENGP.COM is a TSR supplied by Compaq to fix an incompatibility between some applications and Tseng ET4000-based video adapters
Range:
AH=C0h to AH=FFh, selected automatically
Note: The installation check is completed by comparing the first eleven bytes at DS:005Fh against the TSR's code (80h FCh 06h 74h 0Ah 80h FCh 07h 74h 05h EAh)
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