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  |