WD90C30 video card Settings and Configuration

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