AGC POST/WRITE - Hercules graphics card

- ACT = Advanced Computer Tech

- Standard Hercules monochrome graphics, or CGA emulation with
  "16 gray scales", on TTL monochrome monitor.

- High resolution text mode; 80x43, 132x25, 132x43.

- Built-in cache memory to speed up video display (Postwrite).

            JP7 JP4 JP6           
   .-----------------------..--
   |# # ####  :  :  :    .--|.
   |# #                  |  ||  JP1  9pol dsub female
   |     ########JP2:#   `--|'  TTL Monochrome or RGB monitor
   |###         JP5..#   .--|.
   |###                  |  ||  JP3  25pol dsub female
   |     #####     # #   |  ||  Parallell printer port
   |#    #####     # #   |  ||
   |#                    `--|'
   `----mmmmmmmmmmmmmmmmm--'|
        """""""""""""""""   |

JP1. Video connector. 1,2,4=GND, 3=R, 4=G, 5=B, 6=Intens, 7=Video
     8=Hsync, 9=Vsync     (yes, the manual says R,G,B)

JP2. Light Pen interface.

JP4. Postwrite. Middle+Upper=Disable, Middle+Lower=Enable.
     Postwrite Enable is faster but may cause problem with some
     motherboards.

JP5. Printer port. Middle+Left=Enable, Middle+Right=Disable.

JP6. Mode. Middle+Upper=CGA emulation, Middle+Lower=Hercules.

JP7. Monitor. Middle+Upper=RGB, Middle+Lower=TTL monochrome.
     You must set JP5 to 'Disable' to use RGB monitor.


Utility program: AGCSW - to switch between Hercules and CGA emulation
  mode. Also to set 132 column display mode.


/ Tomas Andersson 1993-04-19