UNIDENTIFIED
WD90C30
|
Category |
Video |
|
Video Types Supported |
XVGA |
|
Video Processor |
Western Digital 90 |
|
Highest Resolution Supported |
1024 x 768 |
|
Data Bus Type |
16-bit ISA |
|
Memory Type |
DRAM |
|
Maximum Onboard Memory |
1MB |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
15-pin analog video port |
CN1 |
VGA feature connector |
CN2 |
|
DISPLAY MEMORY CONFIGURATION | |
|
Memory |
JP1 |
|
1MB |
Pins 1 & 2 closed |
|
512KB |
Pins 2 & 3 closed |
|
ZERO WAIT STATE CONFIGURATION | ||
|
Setting |
JP2 | |
|
Enabled |
Pins 2 & 3 closed | |
|
Disabled |
Pins 1 & 2 closed | |
|
MONITOR VERTICAL RETRACE TIMING CONFIGURATION (800 X 600) | |||
|
Setting |
SW1/1 |
SW1/2 | |
|
56Hz |
Off |
Off | |
|
60Hz |
Off |
On | |
|
72Hz |
On |
Off | |
|
Note: 72Hz requires 1MB of DRAM memory. | |||
|
MONITOR VERTICAL RETRACE TIMING CONFIGURATION (1024 X 768) | ||
|
Setting |
SW1/3 |
SW1/4 |
|
Interlaced |
Off |
Off |
|
60Hz non-interlaced |
Off |
On |
|
70Hz non-interlaced |
On |
Off |
|
Note: 70Hz requires 1MB of DRAM memory. | ||
|
VERTICAL SCAN RATE CONFIGURATION | ||
|
Rate |
SW1/5 | |
|
31.5KHz |
Off | |
|
40KHz |
On | |
|
VGA MONITOR CONFIGURATION | ||
|
Setting |
SW1/6 (Optional) | |
|
Color |
Off | |
|
Monochrome |
On | |
|
Note: SW1/6 location is unidentified and may be present on other revisions of this board. | ||
|
DRAM CONFIGURATION | ||
|
Memory |
Bank 0 |
Bank 1 |
|
512KB |
(4) 256K x 4 |
None |
|
1MB |
(4) 256K x 4 |
(4) 256K x 4 |