UNIDENTIFED

8900 VGA MASTER (FOUR LAYER)

Card Type

Video card

Video Chip Set

Unidentified

Maximum Video Memory

8MB DRAM

Video Types Supported

MGA, CGA, EGA, VGA

Highest Resolution Supported

1024 x 768

Data Bus

16-bit ISA

CONNECTIONS

Function

Label

Function

Label

15-pin analog video port

CN1

Feature connector

CN2

USER CONFIGURABLE SETTINGS

Function

Label

Position

 

DRAM clock at 40 MHz (2 DRAM)

JP1

Pins 2 & 3 closed

 

DRAM clock at 48 MHz (4/8 DRAM)

JP1

Pins 1 & 2 closed

»

Factory configured - do not alter

SW1/1

On

»

Factory configured - do not alter

SW1/2

On

»

Less than 48KHz scan rate

SW1/3

On

 

48-49KHz scan rate

SW1/3

Off

»

Factory configured - do not alter

SW1/4

On

»

Fast address decode

SW1/5

Off

 

Slow address decode

SW1/5

On

»

16 bit data path

SW1/6

Off

 

8 bit data path

SW1/6

On

DRAM JUMPER CONFIGURATION

Size

JP3

JJ1/A

JJ1/B

JJ1/C

JJ1/D

2MB

Pins 1 & 2, 4 & 5

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

4MB

Pins 1 & 4, 2 & 5

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

8MB

Pins 2 & 3, 5 & 6

Pins 2 & 3

Pins 2 & 3

Pins 2 & 3

Pins 2 & 3

Note: Pins indentified are in the closed position

DRAM JUMPER CONFIGURATION

Size

JJ1/E

JJ1/F

JJ1/G

JJ1/H

JJ1/I

2MB

Pins 1 & 2, 4 & 5

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

4MB

Pins 1 & 4, 2 & 5

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

8MB

Pins 2 & 3, 5 & 6

Pins 2 & 3

Pins 2 & 3

Pins 2 & 3

Pins 2 & 3

Note: Pins indentified are in the closed position

BUS SIZE SELECTION

Setting

JP4

»

Autodetect

Pins 2 & 3 closed

 

Standard interface

Pins 1 & 2 closed

IRQ INTERRUPT SELECTION

Setting

J2

»

IRQ9 disabled

Pins 2 & 3 closed

 

IRQ9 enabled

Pins 1 & 2 closed

Hosted by uCoz