UNIDENTIFIED
WD90C31 LOCAL BUS ACCELERATOR
|
Category |
Video |
|
Video Types Supported |
XVGA |
|
Video Processor |
WD90C31 |
|
Highest Resolution Supported |
1280 X 1024 |
|
Data Bus Type |
VESA local bus |
|
Memory Type |
DRAM |
|
Maximum Onboard Memory |
1024KB |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
15-pin analog video port |
J1 |
VGA feature connector |
J2 |
|
DELAY CYCLE SELECTION | ||
|
Delay |
JP1 |
JP2 |
|
1 clock cycle (486/Pentium) |
Pins 1 & 2 closed |
Open |
|
2 clock cycles (386) |
Pins 2 & 3 closed |
Closed |
|
800 X 600 REFRESH RATE SELECTION | ||
|
Refresh |
SW1/1 |
SW1/2 |
|
56.5Hz |
Off |
Off |
|
72.1Hz |
On |
Off |
|
60.5Hz |
Off |
On |
|
56.5Hz |
On |
On |
|
1024 X 768 REFRESH RATE SELECTION | |||
|
Refresh |
Mode |
SW1/3 |
SW1/4 |
|
86.7Hz |
Interlaced |
Off |
Off |
|
70.2Hz |
Non-Interlaced |
On |
Off |
|
60.2Hz |
Non-Interlaced |
Off |
On |
|
72.3Hz |
Non-Interlaced |
On |
On |
|
HORIZONTAL REFRESH RATE SELECTION | |
|
Refresh |
SW1/5 |
|
31.5 KHz |
Off |
|
40 KHz |
On |