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





PREMIUM 386C

AST RESEARCH, INC.

PREMIUM 386C

Processor

80386DX

Processor Speed

20MHz

Chip Set

AST

Max. Onboard DRAM

None (16MB on 32-bit external memory card)

Cache

None (64KB on 32-bit external memory card)

BIOS

AST

Dimensions

330mm x 218mm

I/O Options

32-bit external memory card slot, parallel port, serial ports (2), SMART expansion/16-bit ISA expansion slots (3)

NPU Options

80287/80387

CONNECTIONS

Purpose

Location

Purpose

Location

32-bit external memory card

J7

Front panel switches & LEDs

P5

SMART expansion or 16-bit ISA

S1, S2 & S3

Speaker

P6

Serial port 2 header

P2

External battery

P8

Floppy drive interface (A: and B:)

P3

Optional ROM (odd)

U89

Third floppy drive interface

P4

Optional ROM (even)

U88

CONNECTIONS

Purpose

Location

Purpose

Location

Serial port 1

COM1

Parallel port

LPT1

Serial port 2

COM2

Keyboard

KYBD

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Factory configured - do not alter

E1

closed

Factory configured - do not alter

E2

closed

Factory configured - do not alter

E3

closed

Factory configured - do not alter

E4

open

Factory configured - do not alter

E5

closed

Factory configured - do not alter

E6

open

Note:Jumper E6 may not appear on all board revisions.

USER CONFIGURABLE SETTINGS

Function

Switch

Position

Parity check enabled

SW1/switch 7

closed

 

Parity check disabled

SW1/switch 7

open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB 1

(4) 256K x 9

NONE

NONE

NONE

2MB 1

(4) 256K x 9

(4) 256K x 9

NONE

NONE

3MB 1

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

NONE

4MB 1

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

4MB 2

(4) 1M x 9

NONE

NONE

NONE

5MB 1

(4) 256K x 9

(4) 1M x 9

NONE

NONE

6MB 1

(4) 256K x 9

(4) 256K x 9

(4) 1M x 9

NONE

7MB 1

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

(4) 1M x 9

8MB 2

(4) 1M x 9

(4) 1M x 9

NONE

NONE

9MB 1

(4) 256K x 9

(4) 1M x 9

(4) 1M x 9

NONE

10MB 1

(4) 256K x 9

(4) 256K x 9

(4) 1M x 9

(4) 1M x 9

12MB 2

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

NONE

13MB 1

(4) 256K x 9

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

16MB 2

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

Notes 1 & 2 :Please see the next table for the proper switch settings for this configuration.

DRAM SWITCH CONFIGURATION

Size

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

SW1/7

SW1/8

1MB 1

open

open

open

open

open

open

closed

open

2MB 1

open

closed

open

open

open

open

closed

open

3MB 1

open

closed

open

closed

open

open

closed

open

4MB 1

open

closed

open

closed

open

closed

closed

open

4MB 2

open

open

open

closed

open

closed

closed

closed

5MB 1

closed

open

open

open

open

open

closed

open

6MB 1

open

closed

closed

open

open

open

closed

open

7MB 1

open

closed

open

closed

closed

open

closed

open

8MB 2

closed

open

open

open

open

open

closed

closed

9MB 1

closed

open

closed

open

open

open

closed

open

10MB 1

open

closed

closed

open

closed

open

closed

open

12MB 2

closed

open

closed

open

open

open

closed

closed

13MB 1

closed

open

closed

open

closed

open

closed

open

16MB 2

closed

open

closed

open

closed

open

closed

closed

Notes 1 & 2 :Please see the previous table for the proper configuration for these switch settings.

SRAM CONFIGURATION

Size

Cache SRAM

64KB

(8) 8K x 8 on a SIMM-type module (AST Part# 202303-001)