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PREMIUM SE 486/50 (MODEL 202377-002)

AST RESEARCH, INC.

PREMIUM SE 486/50 (MODEL 202377-002)

Processor

80486DX (on external CPU/Memory module)

Processor Speed

50MHz

Chip Set

AST

Max. Onboard DRAM

None (32MB on external CPU/Memory module)

Cache

None (256KB on external CPU/Memory module)

BIOS

AST

Dimensions

355mm x 266mm

I/O Options

32-bit external CPU/Memory module slot

32-bit external Memory module slot (2)

bus mouse port, floppy drive interface

IDE interface, parallel port, serial port (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Bus mouse port

CN1

External battery

P14

Speaker

J12

Serial port 1 (COM1)

P17

Parallel port

J19

Serial port 2 (COM2)

P18

Floppy drive interface (A: and B:)

J20

32-bit external CPU/Memory module

S1

Third floppy drive interface

J21

32-bit external Memory module slots

S2 & S3

IDE interface

J22

Optional ROM (even)

U7

IDE interface LED

J23

Optional ROM (odd)

U8

Front panel switches & LEDs

P11

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Factory configured - do not alter

E1

open

Password check enabled

E2

pins 2 & 3 closed

 

Password check disabled

E2

pins 1 & 2 closed

Factory configured - do not alter

E3

open

Factory configured - do not alter

E4

closed

Factory configured - do not alter

E5

closed

Factory configured - do not alter

E6

open

CONNECTIONS

Purpose

Location

Reserved for future use

EXP

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Parity check enabled

E1

closed

 

Parity check disabled

E1

open

Cache enabled

E2

closed

 

Cache disabled

E2

open

Note:AST CPU/Memory module part number is 202465-005.

DRAM CONFIGURATION

Size

Bank 0

16MB

(4) 4M x 9

32MB

(4) 8M x 9

Notes:256KB of SRAM Cache is included as a module on the CPU/Memory module.

384KB of DRAM is reserved for System and VGA BIOS shadowing and cannot be disabled.

Up to two of the following memory boards may be installed in addition to the CPU/Memory

module: AST part numbers 202275-004, 202275-006, 202387-001, 202387-004

or 202387-005.