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

 

 

Note: Either U1 or U2 should be installed, but not both.

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

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.

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