GEM 2.1 video drivers
=====================

  This zipfile contains reconstructed source code for the following GEM/2.1 
video drivers. The drivers fall into three categories:

1. Drivers which I can compare to the original GEM 2.1 drivers, to be sure 
  they exactly match.

2. Drivers for which I haven't got the original, but which I can test. These
  may not be the same as the originals (or, like the VGA driver, may be 
  backports of drivers for which an original never existed), but it's a 
  good bet that they work.

3. Drivers where I haven't got the original and can't test, so I've no idea
  if they even work.

Driver     | Category | Resolution | Colours | Supported hardware
===========+==========+============+=========+===============================
SDATT6.CGA |        1 | 640x400    |  2      | AT&T 6300 and compatibles
SDCGA6.CGA |        1 | 640x200    |  2      | CGA and compatibles
SDDEB6.CGA |        1 | 640x400    | 16      | AT&T 6300 Display Enh Board
SDEH86.EGA |        1 | 640x350    |  8      | EGA colour
SDEHF6.EGA |        1 | 640x350    | 16      | EGA colour
SDEHM6.EGA |        1 | 640x350    |  2      | EGA mono 
SDEL86.EGA |        1 | 640x200    |  8      | EGA colour with CGA monitor
SDELF6.EGA |        1 | 640x200    | 16      | EGA colour with CGA monitor
SDGEN6.VGA |        3 | 1008x728   |  2      | Genius card
SDHRC6.EGA |        1 | 640x350    |  2      | Hercules
SDKHM6.EGA |        1 | 720x350    |  2      | IBM 3270 PC
SDP646.VGA |        3 | 640x480    | 16      | Quadram Prosync
SDP756.VGA |        3 | 752x410    | 16      | Quadram Prosync
SDPSC6.VGA |        2 | 640x480    | 16      | VGA 
SDPSM6.VGA |        2 | 640x480    |  2      | MCGA 
SDWYS6.VGA |        3 | 1280x800   |  2      | Wyse 700 
===========+==========+============+=========+===============================

  Note that because I've worked backwards from the GEM/3 driver source 
tree, I've retained the GEM/3 driver naming convention; the real GEM/2.1
drivers have different names:

GEM/3 style name | GEM/2.1 style name
=================+===================
 SDATT6.EGA      | ATTMONP6.SYS
 SDCGA6.CGA      | IBMCHMP6.SYS
 SDDEB6.EGA      | ATTDEBP6.SYS
 SDEH86.CGA      | IBMEH8P6.SYS
 SDEHF6.CGA      | IBMEHFP6.SYS
 SDEHM6.CGA      | IBMEHMP6.SYS
 SDEL86.CGA      | IBMEL8P6.SYS
 SDELF6.CGA      | IBMELFP6.SYS
 SDGEN6.CGA      | n/a
 SDHRC6.CGA      | HERMONP6.SYS
 SDKHM6.CGA      | KINGHMP6.SYS
 SDP646.VGA      | n/a
 SDP756.EGA      | n/a
 SDPSC6.VGA      | n/a
 SDPSM6.VGA      | n/a
 SDWYS6.VGA      | n/a 
