Realtek RT 3106    -  Upto 1 Mbyte.


 
  3CEh index  Fh (R/W): Extended Function.
  bit   2  Single/Dual bank.
	   If set 3D6h is the read bank number and 3D7h is the write bank number.
	   if clear 3D7h is used for both read and write operations.

  3d4h index 1Ah:
  bit 6-7  Chip version.  0=Version 0, 1= Version 1, 2=Version 2, 3=Version x

  3d4h index 1Eh:
  bit 0-1  Video Ram. If Chip version =0: 0=256k, 1=512k, 2=768k and 3=1MB
		      If chip version >0: 0=256k, 1=512k, 2=1MB and 3=2MB.
	2  
      4-7  

  3D4h index 1Fh (R/W):
  bit 0-1  Emulation mode: 0=VGA, 1=EGA, 2=CGA, 3=MDA
      2-5

  3D6h (R/W): Bank register
  bit 0-3  64k Bank register   (Read bank if 3CEh index Fh bit 2 set)

  3D7h (R/W): Bank Register
  bit 0-3  64k bank number.    (Write/single bank)


  Test for Realtek Chip:

  if testinx2(crtc,$1f,$3f) and tstrg($3d6,$f) and tstrg($3d7,$f) then
	Realtek!!!.


  Video modes:

    18h  T     80   30  16
    19h  T     80   43  16
    1Ah  T     80   60  16
    1Bh  T    132   25  16
    1Ch  T    132   30  16
    1Dh  T    132   43  16
    1Eh  T    132   60  16
    1Fh  G    800  600  16  planar
    20h  G    960  720  16  planar
    21h  G   1024  768  16  planar
    22h  G    768 1024  16  planar
    23h  G   1024  768   4  planar
    24h  G    512  512 256  packed
    25h  G    640  400 256  packed
    26h  G    640  480 256  packed
    27h  G    800  600 256  packed
    28h  G   1024  768 256  packed
    29h  G   1024 1024 256  packed
    2Ah  G   1280 1024  16  planar