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# MAGNAVOX
VGA VIDEO ADAPTER
Category Video
Video Types Supported VGA
Video Processor 82C451
Highest Resolution Supported 640 x 480
Data Bus Type 16-bit ISA
Memory Type VRAM
Maximum Onboard Memory Unidentified
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------------+----------+-------------+----------|
| 15-pin analog video | CN1 | VGA Feature | CN3 |
| port | | Connector | |
|------------------------+----------+-------------+----------|
| 9-pin digital video | CN2 | | |
| port | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SINGLE VGA CARD CONFIGURATION |
|------------------------------------------------------------|
| Setting | SW1/1 | SW1/2 | SW1/3 | SW1/4 |
|--------------------+---------+---------+---------+---------|
| MD | Off | Off | On | Off |
|--------------------+---------+---------+---------+---------|
| ED 350 Lines | Off | On | On | Off |
|--------------------+---------+---------+---------+---------|
| ED 200 Lines | On | On | On | Off |
|--------------------+---------+---------+---------+---------|
| CD 80x25 | Off | Off | Off | On |
|--------------------+---------+---------+---------+---------|
| CD 40x25 | On | Off | Off | On |
|------------------------------------------------------------|
| Note: MD = Monochrome Display, ED = Enhanced Color |
| Display, CD = Color Display. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DUAL VIDEO CARD COFIGURATION |
|------------------------------------------------------------|
| Primary | Secondary | SW1/1 | SW1/2 | SW1/3 | SW1/4 |
| Adapter | Adapter | | | | |
|--------------+-------------+-------+-------+-------+-------|
| EGA with MD | CGA 80X25 | Off | Off | On | Off |
| | or none | | | | |
|--------------+-------------+-------+-------+-------+-------|
| EGA with MD | CGA 40 X 25 | On | Off | On | Off |
|--------------+-------------+-------+-------+-------+-------|
| EGA with ED | MDA or none | Off | On | On | Off |
| 350 Lines | | | | | |
|--------------+-------------+-------+-------+-------+-------|
| EGA with ED | MDA or none | On | On | On | Off |
| 200 Lines | | | | | |
|--------------+-------------+-------+-------+-------+-------|
| EGA with CD | MDA or none | Off | Off | Off | On |
| 80x25 | | | | | |
|--------------+-------------+-------+-------+-------+-------|
| EGA with CD | MDA or none | On | Off | Off | On |
| 40X25 | | | | | |
|--------------+-------------+-------+-------+-------+-------|
| CGA 80X25 | EGA with MD | Off | On | Off | On |
|--------------+-------------+-------+-------+-------+-------|
| CGA 40X25 | EGA with MD | On | On | Off | On |
|--------------+-------------+-------+-------+-------+-------|
| MDA | EGA with ED | Off | Off | On | On |
| | 350 Lines | | | | |
|--------------+-------------+-------+-------+-------+-------|
| MDA | EGA with ED | On | Off | On | On |
| | 200 Lines | | | | |
|--------------+-------------+-------+-------+-------+-------|
| MDA | EGA CD | Off | On | On | On |
| | 80X25 | | | | |
|--------------+-------------+-------+-------+-------+-------|
| MDA | EGA CD | On | On | On | On |
| | 40X25 | | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MONITOR TYPE |
|------------------------------------------------------------|
| Setting | SW1/5 |
|-------------------------------+----------------------------|
| Analog Monitor | On |
|-------------------------------+----------------------------|
| Digital Monitor | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FACTORY CONFIGURED SETTING |
|------------------------------------------------------------|
| Setting | SW1/6 |
|---------------------------------------+--------------------|
| Reserved for new version of software. | N/A |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIOS JUMPERS |
|------------------------------------------------------------|
| Setting | W2 | W3 |
|-------------------------------+--------------+-------------|
| 16 bit BIOS for AT system or | Closed | Closed |
| | | |
| 8 bit BIOS for XT system | | |
|-------------------------------+--------------+-------------|
| 8 bit BIOS for AT system | Open | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VERTICAL INTERRUPT SETTING |
|------------------------------------------------------------|
| Setting | W1 |
|---------------------------------------------------+--------|
| ยป | Disables interrupts for each vertical sync | Open |
| | pulse | |
|---+-----------------------------------------------+--------|
| | Enables interrupts for each vertical sync | Closed |
| | pulse | |
+------------------------------------------------------------+