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 |