Int 2F Fn D201  u - Quarterdeck Rpci - Vidram V5.0+ - Installation Check   [V]

   AX = D201h
   BX = 5649h ("VI")
   CX = 4452h ("DR")
   DX = 414Dh ("AM")

Return: BX = 4F4Bh ("OK")
   ES:DI -> VIDRAM entry point (see #2752)
Range: AH=C0h to AH=FFh, selected by scanning AH=D2h-FFh, then AH=C0h-D1h

See Also: AX=D200h

(Table 2752)
Call VIDRAM entry point with:
   AH = 00h get status

       Return: AL = VIDRAM state (see #2753)
           BL = extra RAM status (see #2754)
           BH = feature flags (see #2755)
           CL = current monitor (01h = mono, 80h = color)
           SI = current top of memory (paragraph)
           DI = segment of start of HiRAM chain
   AH = 01h setup
       AL = VIDRAM state (see #2753)
       BL = extra RAM status (see #2754)
       BH = feature flags (see #2755)
       CL = monitor (01h = monochrome, 80h = color)
       SI = new top of memory (paragraph)
       DI = segment of start of HiRAM chain
   AH = 02h get end address of VIDRAM code

       Return: ES:DI -> VIDRAM partial map context (see #2756,#2757)

Return: CF set on error
   CF clear if successful

(Table 2753)
Values for VIDRAM state:
 00h   off
 01h   no EGA graphics
 02h   no graphics at all

(Table 2754)
Values for VIDRAM extra RAM status:
 00h   VIDRAM does not use extra RAM
 01h   VIDRAM uses EMS as extra RAM
 02h   VIDRAM uses EGA as extra RAM

Bitfields for VIDRAM feature flags:
Bit(s) Description (Table 2755)
 0 override enabled
 1 mapped memory detected in A000h-B000h range
 2 top of memory not at 640K
 3 MDA detected
 4 high RAM exists in video area
 5 mapped memory detected in video area
 6-7   reserved???

Format of VIDRAM partial map context (EMS 3.2):
Offset Size    Description (Table 2756)
 00h   BYTE    EMS version ID (32h)
 01h   WORD    EMM handle for this entry
 03h   BYTE    number of frames
 04h   BYTE    first page frame
 05h   WORD    offset from ES to previously saved map

Format of VIDRAM partial map context (EMS 4.0):
Offset Size    Description (Table 2757)
 00h   BYTE    EMS version ID (40h)
 01h   WORD    mappable segment count
 03h  N WORD   mappable segments
   WORD    offset to previously saved map???