AST RESEARCH, INC.

AST-3G PLUS (202104-001)

Category                   Video
Video Types Supported      CGA, EGA, Monochrome
Video Processor            Western Digital
Highest Resolution         720 X 348
Supported
Data Bus Type              8-bit ISA
Memory Type                DRAM
Maximum Onboard Memory     256KB

[Image]

                                CONNECTIONS

       Purpose           Location           Purpose           Location

  15-pin analog            CN1         Optional parallel         P3
  video port                           port

  RCA video port 1         RCA1        32-pin feature            P4
                                       connector

  RCA video port 2         RCA2        Parallel port            U25
                                       upgrade socket

  Light pen                 P2         Plus option socket       U30
  connector

                         VIDEO MODE CONFIGURATION

       Type         Resolution    SW1/1    SW1/2   SW1/3    SW1/4    SW2

  »      EGA        640 x 350      Off      On       On      Off     Off

         EGA        320 x 200      Off      On       On      Off      On

         CGA        320 x 200      On       On       On      Off     Off

      Monochrome    640 x 350      Off      Off      On      Off     Off

      Monochrome    720 x 348      Off      Off      On      Off      On

                               MONITOR TYPE

                 Type                                  E5

  »                EGA                         Pins 1 & 2 closed

                   CGA                         Pins 2 & 3 closed

                         DRAM JUMPER CONFIGURATION

                 Size                                   E1

  »                 64KB                               Open

                   256KB                              Closed

                     PARALLEL PORT I/O ADDRESS SELECT

               Address                                 E4

  »                378h                         Pins 1 & 2 closed

                   278h                         Pins 2 & 3 closed

                      PARALLEL PORT INTERRUPT SELECT

                 IRQ                                   E6

  »                IRQ7                         Pins 2 & 3 closed

                   IRQ5                         Pins 1 & 2 closed

       FACTORY CONFIGURED SETTINGS

       Jumper              Setting

         E2                 Closed

         E3           Pins 1 & 2 closed

                       MISCELLANEOUS TECHNICAL NOTE

       Note:The AST 3G-Plus comes equipped with 64KB of memory and is
       upgradeable to 256KB. The type of memory used and the location of
       Bank 0(the first 64KB) is unspecified in manufacturer
       documentation. Upgrade kits are available through AST.