...because we can't all be on the bleeding edge...





VGA GRAPHICS ADAPTER

UNIDENTIFIED

VGA GRAPHICS ADAPTER

Category

Video

Video Types Supported

XVGA

Video Processor

Trident TVGA 8900

Highest Resolution Supported

1024 x768

Data Bus Type

16-bit ISA

Memory Type

DRAM

Maximum Onboard Memory

2MB

CONNECTIONS

Purpose

Location

Purpose

Location

15-pin analog video port

CN1

9-pin TTL port

CN3

VGA feature connector

CN2

   

INTERRUPT

IRQ9

J1

Disabled

Pins 2 & 3 closed

 

Enabled

Pins 1 & 2 closed

MONITOR SELECT

Setting

SW1/A

SW1/B

VBA

On

On

EGA

Off

On

CGA

On

Off

MDA/Hercules

Off

Off

Note:SW1/A & B affects 9-pin TTL connection. Not present on all cards.

REFRESH RATE

Rate

SW1/C

Less than 48MHz

On

48-49MHz

Off

ADDRESS DECODE

Setting

SW1/E

Fast address decode

Off

 

Slow address decode

On

8/16 BUS SELECT

Setting

SW1/F

16-bit

Off

 

8-bit

On

BUS SIZE DETECTION

Setting

J2

Autodetect

Pins 2 & 3 closed

Standard interface

Pins 1 & 2 closed

Note: J2 orientation varies. Check pin numbers on card.

CLOCK SPEED

Setting

J4

40MHz(512KB)

Pins 2 & 3 closed

 

48Mhz(1 & 2MB)

Pins 1 & 2 closed

Note: Location of J4 unidentified. Not present on all cards.

J3

DRAM SIZE

Size

JP1

JP2

J3

512KB

Open

Closed

Pins 1 & 2, 4 & 5 closed

1MB

Open

Closed

Pins 1 & 4, 2 & 5 closed

2MB

Closed

Open

Pins 2 & 3, 5 & 6 closed

Note: JP1 & 2 are jumper blocks, number of pins unidentified. Not present on all cards. Orientation of J3 unidentified

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

512KB

(2)256KB x 4

None

None

1MB

(2)256KB x 4

(2)256KB x 4

None

2MB

(2)256KB x 4

(2)256KB x 4

(4)256KB x 4

Note: DRAM not configurable on all cards.

FACTORY CONFIGURED SETTINGS

Switch

Position

SW1/D

On