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# UNIDENTIFIED
TVGA 8902/4/8-DRAM
Card Type Video Card
Video Chip Set Unidentified
Maximum Video Memory 1MB DRAM
Video Types Supported VGA
Highest Resolution Supported 1024 x 768
Data Bus 16-bit ISA
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|---------------------------+-------+----------------+-------|
| 15-pin analog video port | CN1 | 9-pin TTL Port | CN3 |
|---------------------------+-------+----------------+-------|
| Feature connector | CN2 | | |
| (VGA/VESA) | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|----------------------------------------+-------+-----------|
| » | Unidentified | SW1/4 | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BUS SIZE DETECTION |
|------------------------------------------------------------|
| Setting | J2 |
|----------------------------------+-------------------------|
| » | Autodetect | Pins 2 & 3 Closed |
|-------+--------------------------+-------------------------|
| | Standard Interface | Pins 1 & 2 Closed |
|------------------------------------------------------------|
| Note: Orientation of J2 may vary. Check pin numbers on |
| card. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BUS SIZE SELECTION |
|------------------------------------------------------------|
| Setting | SW1/6 |
|--------------------------------+---------------------------|
| » | 16-bit | Off |
|---+----------------------------+---------------------------|
| | 8-bit | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SCAN RATE SELECTION |
|------------------------------------------------------------|
| Rate | SW1/3 |
|-----------------------------------+------------------------|
| » | Less than 48Mhz | On |
|---+-------------------------------+------------------------|
| | 48-49Mhz | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MONITOR SELECT |
|------------------------------------------------------------|
| Setting | SW1/1 | SW1/2 |
|-------------------------+-----------------+----------------|
| VGA | On | On |
|-------------------------+-----------------+----------------|
| EGA | Off | On |
|-------------------------+-----------------+----------------|
| CGA | On | Off |
|-------------------------+-----------------+----------------|
| MDA/Hercules | Off | Off |
|------------------------------------------------------------|
| Note: SW1/1 & 2 affects 9-pin TTL connection. Not present |
| on all cards. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTERRUPT |
|------------------------------------------------------------|
| IRQ 9 | J1 |
|----------------------------+-------------------------------|
| » | Disabled | Pins 2 & 3 Closed |
|---+------------------------+-------------------------------|
| | Enabled | Pins 1 & 2 Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ADDRESS DECODE |
|------------------------------------------------------------|
| Setting | SW1/5 |
|-----------------------------------+------------------------|
| » | Fast address decode | Off |
|---+-------------------------------+------------------------|
| | Slow address decode | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|-----------+----------------+---------------+---------------|
| 256KB | (2) 128KB x 4 | None | None |
|-----------+----------------+---------------+---------------|
| 512KB | (2) 128KB x 4 | (2) 128KB x 4 | None |
|-----------+----------------+---------------+---------------|
| 1MB | (2) 128KB x 4 | (2) 128KB x 4 | (4) 128KB x 4 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO MEMORY JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP1 | JP2 | J3 |
|------------+-------------+-------------+-------------------|
| 256KB | Open | Closed | Pins 1 & 2, 4 & 5 |
| | | | closed |
|------------+-------------+-------------+-------------------|
| 512KB | Open | Closed | Pins 1 & 4, 2 & 5 |
| | | | closed |
|------------+-------------+-------------+-------------------|
| 1MB | 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 |
| may vary. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CLOCK SPEED |
|------------------------------------------------------------|
| Setting | J4 |
|--------------------------------+---------------------------|
| » | 40Mhz(2 DRAM) | Pins 2 & 3 closed |
|---------+----------------------+---------------------------|
| | 48Mhz(4/8 DRAM) | Pins 1 & 2 closed |
|------------------------------------------------------------|
| Note: Exact location of J4 unidentified. Not present on |
| all cards |
+------------------------------------------------------------+