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# STB SYSTEMS, INC.
POWERGRAPH VGA (VER. 2)
Card Type Video
Video Chip Set Unidentified
Highest Resolution Supported 1024 x 768
Maximum Onboard Memory 1MB DRAM
Data Bus 16-bit ISA
Video Types Supported XVGA
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|-------------------------+--------+-----------------+-------|
| 15-pin analog video | J5 | DAC chip socket | U2 |
| port | | | |
|-------------------------+--------+-----------------+-------|
| DAC chip | U1 | | |
|------------------------------------------------------------|
| Note: Either U1 or U2 should be installed, but not |
| both. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Setting | Label | Position |
|---------------------------------------+-------+------------|
| » | Two wait state operation | J1 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Zero wait state operation | J1 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| » | Card does not use IRQ2/9 | J2 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Card uses IR/FONT | J2 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | J3 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| » | BIOS uses 8-bit I/O | J5 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | BIOS uses 16-bit I/O | J5 | Pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM |
|------------------------------------------------------------|
| Note: This card may take 256KB, 512KB, or 1MB of |
| on-board DRAM. The locations of the banks and the |
| configurations of the chips in these banks is |
| unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VERTICAL SCAN RATE |
|------------------------------------------------------------|
| Resolution | Scan Rate | J4 |
|------------------+--------------------+--------------------|
| 640 x 480 | 60Hz | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 800 x 600 | 56Hz | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 1024 x 768 | 43Hz (interlaced) | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 640 x 480 | 72Hz | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 800 x 600 | 72Hz | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 1024 x 768 | 60Hz | Pins 2 & 3 closed |
+------------------------------------------------------------+