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# STB SYSTEMS, INC.
POWERGRAPH VGA
Category Video
Video Types Supported XVGA
Video Processor Tseng Laboratories
Highest Resolution Supported 1024 x 768
Data Bus Type 16-bit ISA
Memory Type DRAM
Maximum Onboard Memory 1024KB
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------------+----------+--------------+----------|
| 15-pin analog video | CN1 | VESA feature | CN2 |
| port | | connector | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ROM DATA BUS |
|------------------------------------------------------------|
| Size | J3 |
|----------------------------+-------------------------------|
| » | 8-bit | Pins 2 & 3 closed |
|---+------------------------+-------------------------------|
| | 16-bit | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTERRUPT SELECT |
|------------------------------------------------------------|
| IRQ2 | J1 |
|----------------------------+-------------------------------|
| » | Enabled | Pins 1 & 2 closed |
|---+------------------------+-------------------------------|
| | Disabled | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | BANK 0 (U1, U2) | BANK 1 (U3, | BANK 2 (U5, U6, |
| | | U4) | U7, U8) |
|-------+-----------------+---------------+------------------|
| 256KB | (2) 256K x 4 | NONE | NONE |
|-------+-----------------+---------------+------------------|
| 512KB | (2) 256K x 4 | (2) 256K x 4 | NONE |
|-------+-----------------+---------------+------------------|
| 1MB | (2) 256K x 4 | (2) 256K x 4 | (4) 256K x 4 |
+------------------------------------------------------------+