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# UNIDENTIFED
8900 VGA MASTER (FOUR LAYER)
Card Type Video card
Video Chip Set Unidentified
Maximum Video Memory 8MB DRAM
Video Types Supported MGA, CGA, EGA, VGA
Highest Resolution Supported 1024 x 768
Data Bus 16-bit ISA
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|------------------------+-------+-------------------+-------|
| 15-pin analog video | CN1 | Feature connector | CN2 |
| port | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|--------------------------------+-------+-------------------|
| | DRAM clock at 40 MHz (2 | JP1 | Pins 2 & 3 closed |
| | DRAM) | | |
|---+----------------------------+-------+-------------------|
| | DRAM clock at 48 MHz (4/8 | JP1 | Pins 1 & 2 closed |
| | DRAM) | | |
|---+----------------------------+-------+-------------------|
| » | Factory configured - do | SW1/1 | On |
| | not alter | | |
|---+----------------------------+-------+-------------------|
| » | Factory configured - do | SW1/2 | On |
| | not alter | | |
|---+----------------------------+-------+-------------------|
| » | Less than 48KHz scan rate | SW1/3 | On |
|---+----------------------------+-------+-------------------|
| | 48-49KHz scan rate | SW1/3 | Off |
|---+----------------------------+-------+-------------------|
| » | Factory configured - do | SW1/4 | On |
| | not alter | | |
|---+----------------------------+-------+-------------------|
| » | Fast address decode | SW1/5 | Off |
|---+----------------------------+-------+-------------------|
| | Slow address decode | SW1/5 | On |
|---+----------------------------+-------+-------------------|
| » | 16 bit data path | SW1/6 | Off |
|---+----------------------------+-------+-------------------|
| | 8 bit data path | SW1/6 | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP3 | JJ1/A | JJ1/B | JJ1/C | JJ1/D |
|------+---------+----------+----------+----------+----------|
| 2MB | Pins 1 | Pins 1 & | Pins 1 & | Pins 1 & | Pins 1 & |
| | & 2, 4 | 2 | 2 | 2 | 2 |
| | & 5 | | | | |
|------+---------+----------+----------+----------+----------|
| 4MB | Pins 1 | Pins 1 & | Pins 1 & | Pins 1 & | Pins 1 & |
| | & 4, 2 | 2 | 2 | 2 | 2 |
| | & 5 | | | | |
|------+---------+----------+----------+----------+----------|
| 8MB | Pins 2 | Pins 2 & | Pins 2 & | Pins 2 & | Pins 2 & |
| | & 3, 5 | 3 | 3 | 3 | 3 |
| | & 6 | | | | |
|------------------------------------------------------------|
| Note: Pins indentified are in the closed position |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JJ1/E | JJ1/F | JJ1/G | JJ1/H | JJ1/I |
|------+-----------+----------+----------+--------+----------|
| 2MB | Pins 1 & | Pins 1 & | Pins 1 & | Pins 1 | Pins 1 & |
| | 2, 4 & 5 | 2 | 2 | & 2 | 2 |
|------+-----------+----------+----------+--------+----------|
| 4MB | Pins 1 & | Pins 1 & | Pins 1 & | Pins 1 | Pins 1 & |
| | 4, 2 & 5 | 2 | 2 | & 2 | 2 |
|------+-----------+----------+----------+--------+----------|
| 8MB | Pins 2 & | Pins 2 & | Pins 2 & | Pins 2 | Pins 2 & |
| | 3, 5 & 6 | 3 | 3 | & 3 | 3 |
|------------------------------------------------------------|
| Note: Pins indentified are in the closed position |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BUS SIZE SELECTION |
|------------------------------------------------------------|
| Setting | JP4 |
|------------------------+-----------------------------------|
| » | Autodetect | Pins 2 & 3 closed |
|---+--------------------+-----------------------------------|
| | Standard interface | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| IRQ INTERRUPT SELECTION |
|------------------------------------------------------------|
| Setting | J2 |
|------------------------+-----------------------------------|
| » | IRQ9 disabled | Pins 2 & 3 closed |
|---+--------------------+-----------------------------------|
| | IRQ9 enabled | Pins 1 & 2 closed |
+------------------------------------------------------------+