EGA/CGA GRAPHICS BOARD (250-3048) video card Settings and Configuration
TANDY/RADIO SHACK
EGA/CGA GRAPHICS BOARD (250-3048)
Card Type | Video card |
Video Processor | 6845 |
Maximum Onboard Memory | 256KB DRAM |
Data Bus | 8-bit ISA |
Video Types Supported | Plantronics, EGA |
Highest Resolution Supported | 720 x 350 |
CONNECTIONS | |||
Function | Label | Function | Label |
Not used | J1 | 9-pin video out connector | J3 |
Not used | J2 | Not used | J4 |
USER CONFIGURABLE SETTINGS | |||
Setting | Label | Position | |
| » | Factory configured - do not alter | P1 | Unidentified |
| » | EGA mode base I/O address set to 3D0h | P3 | Pins 1 & 2 closed |
EGA mode base I/O address set to 2D0h | P3 | Pins 2 & 3 closed | |
| » | Card will use EGA mode by default | SW1/5 | Off |
Card will use CGA or monochrome mode by default | SW1/5 | On | |
Note:SW1/5 must always be turned off for Tandy SX and TX model mainboards. | |||
MONITOR TYPE SELECTION | |||||
Setting | P2 | SW1/1 | SW1/2 | SW1/3 | SW1/4 |
Monochrome | Pins 2 & 3 | Off | Off | On | Off |
CGA | Pins 2 & 3 | Off | Off | Off | On |
EGA | Pins 1 & 2 | Off | On | On | Off |
Note:Pins designated are in the closed position. | |||||
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