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# AST RESEARCH, INC.
AST 3G-PLUS II (202161-001)
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
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| 15-pin analog | CN1 | RCA video port 1 | RCA1 |
| video port | | | |
|-------------------+----------+------------------+----------|
| 32-pin feature | J1 | RCA video port 2 | RCA2 |
| connector | | | |
|-------------------+----------+------------------+----------|
| Light pen | J2 | | |
| connector | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO MODE CONFIGURATION |
|------------------------------------------------------------|
| Type | Resolution | SW1/1 | SW1/2 | SW1/3 | SW1/4 |
|------------+------------+--------+--------+--------+-------|
|»| EGA | 640 x 350 | Off | On | On | Off |
|-+----------+------------+--------+--------+--------+-------|
| | CGA | 320 x 200 | On | On | On | Off |
|-+----------+------------+--------+--------+--------+-------|
| |Monochrome| 640 x 350 | Off | Off | On | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MONITOR AUTODETECT |
|------------------------------------------------------------|
| Setting | SW1/6 |
|----------------------------------------+-------------------|
| » | Disabled | Off |
|----------------+-----------------------+-------------------|
| | Enabled | On |
|------------------------------------------------------------|
| Note: Enabling autodetect disabled switches SW1/1 through |
| SW1/4. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| AUTO EMULATION |
|------------------------------------------------------------|
| Setting | SW1/5 |
|-------------------------------------+----------------------|
| » | Disabled | Off |
|-----------+-------------------------+----------------------|
| | Enabled | On |
|------------------------------------------------------------|
| Note: Auto emulation is used for Hercules and CGA |
| emulation modes. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FACTORY CONFIGURED SETTING |
|------------------------------------------------------------|
| Jumper | Setting |
|----------------------------+-------------------------------|
| E1 | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MISCELLANEOUS TECHNICAL NOTE |
|------------------------------------------------------------|
| Note:The AST 3G-Plus II comes equipped with 64KB of |
| memory and is upgradeable to 256KB. The type of memory |
| used and the location of the Banks is unspecified in |
| manufacturer documentation. Upgrade kits are available |
| through AST. |
+------------------------------------------------------------+