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AST-3G PLUS (202104-001)

AST RESEARCH, INC.

AST-3G PLUS (202104-001)

Category

Video

Video Types Supported

CGA, EGA, Monochrome

Video Processor

Western Digital

Highest Resolution Supported

720 X 348

Data Bus Type

8-bit ISA

Memory Type

DRAM

Maximum Onboard Memory

256KB

CONNECTIONS

Purpose

Location

Purpose

Location

15-pin analog video port

CN1

Optional parallel port

P3

RCA video port 1

RCA1

32-pin feature connector

P4

RCA video port 2

RCA2

Parallel port upgrade socket

U25

Light pen connector

P2

Plus option socket

U30

VIDEO MODE CONFIGURATION

Type

Resolution

SW1/1

SW1/2

SW1/3

SW1/4

SW2

EGA

640 x 350

Off

On

On

Off

Off

 

EGA

320 x 200

Off

On

On

Off

On

 

CGA

320 x 200

On

On

On

Off

Off

 

Monochrome

640 x 350

Off

Off

On

Off

Off

 

Monochrome

720 x 348

Off

Off

On

Off

On

MONITOR TYPE

Type

E5

EGA

Pins 1 & 2 closed

 

CGA

Pins 2 & 3 closed

DRAM JUMPER CONFIGURATION

Size

E1

64KB

Open

 

256KB

Closed

PARALLEL PORT I/O ADDRESS SELECT

Address

E4

378h

Pins 1 & 2 closed

 

278h

Pins 2 & 3 closed

PARALLEL PORT INTERRUPT SELECT

IRQ

E6

IRQ7

Pins 2 & 3 closed

 

IRQ5

Pins 1 & 2 closed

FACTORY CONFIGURED SETTINGS

Jumper

Setting

E2

Closed

E3

Pins 1 & 2 closed

MISCELLANEOUS TECHNICAL NOTE

Note:The AST 3G-Plus comes equipped with 64KB of memory and is upgradeable to 256KB. The type of memory used and the location of Bank 0(the first 64KB) is unspecified in manufacturer documentation. Upgrade kits are available through AST.