(TXT) View Source
# UNIDENTIFIED
VGA GRAPHICS ADAPTER
Category Video
Video Types Supported XVGA
Video Processor Trident TVGA 8900
Highest Resolution Supported 1024 x768
Data Bus Type 16-bit ISA
Memory Type DRAM
Maximum Onboard Memory 2MB
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| 15-pin analog video | CN1 | 9-pin TTL port | CN3 |
| port | | | |
|---------------------+----------+----------------+----------|
| VGA feature | CN2 | | |
| connector | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTERRUPT |
|------------------------------------------------------------|
| IRQ9 | J1 |
|----------------------------+-------------------------------|
| » | Disabled | Pins 2 & 3 closed |
|---+------------------------+-------------------------------|
| | Enabled | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MONITOR SELECT |
|------------------------------------------------------------|
| Setting | SW1/A | SW1/B |
|--------------------------+----------------+----------------|
| VBA | On | On |
|--------------------------+----------------+----------------|
| EGA | Off | On |
|--------------------------+----------------+----------------|
| CGA | On | Off |
|--------------------------+----------------+----------------|
| MDA/Hercules | Off | Off |
|------------------------------------------------------------|
| Note:SW1/A & B affects 9-pin TTL connection. Not present |
| on all cards. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REFRESH RATE |
|------------------------------------------------------------|
| Rate | SW1/C |
|-------------------------------+----------------------------|
| Less than 48MHz | On |
|-------------------------------+----------------------------|
| 48-49MHz | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ADDRESS DECODE |
|------------------------------------------------------------|
| Setting | SW1/E |
|-----------------------------------+------------------------|
| » | Fast address decode | Off |
|---+-------------------------------+------------------------|
| | Slow address decode | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 8/16 BUS SELECT |
|------------------------------------------------------------|
| Setting | SW1/F |
|--------------------------------+---------------------------|
| » | 16-bit | Off |
|---+----------------------------+---------------------------|
| | 8-bit | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BUS SIZE DETECTION |
|------------------------------------------------------------|
| Setting | J2 |
|-------------------------------+----------------------------|
| Autodetect | Pins 2 & 3 closed |
|-------------------------------+----------------------------|
| Standard interface | Pins 1 & 2 closed |
|------------------------------------------------------------|
| Note: J2 orientation varies. Check pin numbers on card. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CLOCK SPEED |
|------------------------------------------------------------|
| Setting | J4 |
|---------------------------------+--------------------------|
| » | 40MHz(512KB) | Pins 2 & 3 closed |
|---------+-----------------------+--------------------------|
| | 48Mhz(1 & 2MB) | Pins 1 & 2 closed |
|------------------------------------------------------------|
| Note: Location of J4 unidentified. Not present on all |
| cards. |
+------------------------------------------------------------+
(IMG) IMG 2
J3
+------------------------------------------------------------+
| DRAM SIZE |
|------------------------------------------------------------|
| Size | JP1 | JP2 | J3 |
|------------+-------------+-------------+-------------------|
| 512KB | Open | Closed | Pins 1 & 2, 4 & 5 |
| | | | closed |
|------------+-------------+-------------+-------------------|
| 1MB | Open | Closed | Pins 1 & 4, 2 & 5 |
| | | | closed |
|------------+-------------+-------------+-------------------|
| 2MB | Closed | Open | Pins 2 & 3, 5 & 6 |
| | | | closed |
|------------------------------------------------------------|
| Note: JP1 & 2 are jumper blocks, number of pins |
| unidentified. Not present on all cards. Orientation of |
| J3 unidentified |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 512KB | (2)256KB x 4 | None | None |
|------------+---------------+---------------+---------------|
| 1MB | (2)256KB x 4 | (2)256KB x 4 | None |
|------------+---------------+---------------+---------------|
| 2MB | (2)256KB x 4 | (2)256KB x 4 | (4)256KB x 4 |
|------------------------------------------------------------|
| Note: DRAM not configurable on all cards. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FACTORY CONFIGURED SETTINGS |
|------------------------------------------------------------|
| Switch | Position |
|-----------------------------+------------------------------|
| SW1/D | On |
+------------------------------------------------------------+