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AX = 5049h ('PI')
BX = function
0000h installation check
0001h lock mode
0002h unlock mode
0003h lock palette
0004h unlock palette
Return:
AX = 0000h if installed
BX = TSR version (BH=major,BL=minor)
CL = mode locking status
00h mode not locked
01h mode locked:
INT 10/AH=00h disabled
CH = palette locking status
00h palette not locked
01h palette locked, the following functions are disabled:
AX=1000h, AX=1001h, AX=1002h, AX=1010h, AX=1012h
Program: SCREENR is a TSR supplied with Patrick Ibbetson's SCREEN display utility.
Index:
Installation check;SCREENR

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