AST RESEARCH, INC.
AST-3G PLUS (202104-001)
|
Category |
Video |
|
Video Types Supported |
CGA, EGA, Monochrome |
|
Video Processor |
Western Digital |
|
Highest Resolution Supported |
720 X 348 |
|
Data Bus Type |
8-bit ISA |
|
Memory Type |
DRAM |
|
Maximum Onboard Memory |
256KB |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
15-pin analog video port |
CN1 |
Optional parallel port |
P3 |
|
RCA video port 1 |
RCA1 |
32-pin feature connector |
P4 |
|
RCA video port 2 |
RCA2 |
Parallel port upgrade socket |
U25 |
|
Light pen connector |
P2 |
Plus option socket |
U30 |
|
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. |