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INT 2F U - Quarterdeck - VIDRAM v5.0+ - INSTALLATION CHECK
AX = D201h
BX = 5649h ("VI")
CX = 4452h ("DR")
DX = 414dh ("AM")
Return: BX = 4F4Bh ("OK")
ES:DI -> VIDRAM entry point
Note: QEMM/QRAM/VIDRAM/MANIFEST will search for a free AH value from D2h
through FFh, then C0h through D1h
Call VIDRAM entry point with:
AH = 00h get status
Return: AL = VIDRAM state (see below)
BL = bit 0: ???
bits 1-7 not used
BH = flags???
bit 4: high RAM exists in video area???
CL = current monitor (01h = mono, 80h = color)
SI = current top of memory (paragraph)???
DI = segment of ???
AH = 01h setup
AL = VIDRAM state (00h off, 01h no EGA graphics, 02h no graph)
BL = bit 0: ???
bits 1-7 not used
BH = flags???
CL = monitor (01h = monochrome, 80h = color)
SI = new top of memory (paragraph)???
AH = 02h get ???
Return: ES:DI -> ??? data
Return: CF set on error
CF clear if successful
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