STB Powergraph VGA

Jumper Settings - Version 1

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

CONNECTIONS
Purpose	Location	Purpose	Location
15-pin analog video port	CN1	VESA feature connector	CN2

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, U4)	BANK 2 (U5, U6, 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

Jumper Settings - Version 2

Card Type	Video
Video Chip Set	Unidentified
Highest Resolution Supported	1024 x 768
Maximum Onboard Memory	1MB DRAM
Data Bus	16-bit ISA
Video Types Supported	XVGA

CONNECTIONS
Function	Label	Function	Label
15-pin analog video port	J5	DAC chip socket	U2
DAC chip	U1
<DIR> <DIR> Note: Either U1 or U2 should be installed, but not both. </DIR> </DIR>

USER CONFIGURABLE SETTINGS
Setting		Label	Position
»	Two wait state operation	J1	Pins 2 & 3 closed
	Zero wait state operation	J1	Pins 1 & 2 closed
»	Card does not use IRQ2/9	J2	Pins 2 & 3 closed
	Card uses IR/FONT	J2	Pins 1 & 2 closed
»	Factory configured - do not alter	J3	Pins 1 & 2 closed
»	BIOS uses 8-bit I/O	J5	Pins 1 & 2 closed
	BIOS uses 16-bit I/O	J5	Pins 2 & 3 closed

DRAM

<DIR> <DIR> Note: This card may take 256KB, 512KB, or 1MB of on-board DRAM. The locations of the banks and the configurations of the chips in these banks is unidentified. </DIR> </DIR>

VERTICAL SCAN RATE
Resolution	Scan Rate	J4
640 x 480	60Hz	Pins 1 & 2 closed
800 x 600	56Hz	Pins 1 & 2 closed
1024 x 768	43Hz (interlaced)	Pins 1 & 2 closed
640 x 480	72Hz	Pins 2 & 3 closed
800 x 600	72Hz	Pins 2 & 3 closed
1024 x 768	60Hz	Pins 2 & 3 closed

See Also

• STB Systems