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 | |