...because we can't all be on the bleeding edge...





EGA/CGA GRAPHICS BOARD (250-3048A)

TANDY/RADIO SHACK

EGA/CGA GRAPHICS BOARD (250-3048A)

Card Type

Video card

Video Processor

6845

Maximum Onboard Memory

256KB DRAM

Data Bus

8-bit ISA

Video Types Supported

EGA

Highest Resolution Supported

720 x 350

CONNECTIONS

Function

Label

9-pin video out

CN1

USER CONFIGURABLE SETTINGS

Setting

Label

Position

EGA mode base I/O address set to 3D0h

P3/A

Pins 1 & 2 closed

 

EGA mode base I/O address set to 2D0h

P3/A

Pins 2 & 3 closed

Card is installed in normal slot

P3/C

Pins 2 & 3 closed

 

Card is installed in XT slot 8

P3/C

Pins 1 & 2 closed

Factory configured - do not alter

SW1/7

Off

Factory configured - do not alter

SW1/8

Off

MONITOR TYPE SELECTION

Primary monitor

Secondary monitor

P1

SW1/1

SW1/2

SW1/3

SW1/4

Lo-res CGA

Monochrome

Pins 2 & 3

On

Off

Off

On

Hi-res CGA

Monochrome

Pins 2 & 3

Off

Off

Off

On

Lo-res EGA

Monochrome

Pins 1 & 2

On

On

On

Off

Hi-res EGA

Monochrome

Pins 1 & 2

Off

On

On

Off

Monochrome

Lo-res CGA

Pins 2 & 3

On

Off

On

Off

Monochrome

Hi-res CGA

Pins 2 & 3

Off

Off

On

Off

Note:Pins designated are in the closed position.

VIDEO MODE SELECTION

Setting

SW1/5

SW1/6

Monochrome

Off

On

CGA

On

Off

EGA

On

On

AUTOMODE CONFIGURATION

Setting

P3/B

P3/D

Enabled

Pins 2 & 3 closed

Pins 1 & 2 closed

 

Disabled

Pins 1 & 2 closed

Pins 2 & 3 closed