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





PS/1 TYPE 2133A, 2155A, 2168A (TYPE 1)

IBM CORPORATION

PS/1 TYPE 2133A, 2155A, 2168A (TYPE 1)

Device Type

Mainboard

Processor

80486SX/80487SX/80486DX/80486DX2/P24T

Processor Speed

25/33/50(internal)/66(internal)MHz

Chip Set

Unidentified

Video Chip Set

Unidentified

Maximum Onboard Memory

64MB

Maximum Video Memory

Unidentified

Cache

128/256KB

BIOS

Unidentified

Dimensions

330mm x 218mm

I/O Options

Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), VGA feature connector, VGA port, riser slot

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

PS/2 mouse port

J2

VGA feature connector

J14

Serial port 1

J3

IDE interface LED

J26

Serial port 2

J4

Speaker

J27

Parallel port

J5

Power supply connector

J29

VGA port

J6

Power supply connector

J30

Floppy drive interface

J7

Riser slot

SL1

IDE interface

J9

   

USER CONFIGURABLE SETTINGS

Function

Label

Position

On board video disabled

J15

Pins 1 & 2 closed

 

On board video enabled

J15

Pins 2 & 3 closed

Factory configured - do not alter (password bypass)

SP103

Unidentified

Factory configured - do not alter

U53

Unidentified

SIMM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(1) 256K x 36

None

None

None

2MB

(1) 256K x 36

(1) 256K x 36

None

None

3MB

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

None

4MB

(1) 1M x 36

None

None

None

4MB

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

5MB

(1) 1M x 36

(1) 256K x 36

None

None

6MB

(1) 1M x 36

(1) 256K x 36

(1) 256K x 36

None

7MB

(1) 1M x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

8MB

(1) 1M x 36

(1) 1M x 36

None

None

12MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

None

16MB

(1) 4M x 36

None

None

None

16MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

17MB

(1) 4M x 36

(1) 256K x 36

None

None

19MB

(1) 4M x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

20MB

(1) 4M x 36

(1) 1M x 36

None

None

24MB

(1) 4M x 36

(1) 1M x 36

(1) 1M x 36

None

24MB

(1) 4M x 36

(1) 2M x 36

None

None

28MB

(1) 4M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

32MB

(1) 4M x 36

(1) 4M x 36

None

None

33MB

(1) 256K x 36

(1) 4M x 36

(1) 4M x 36

None

48MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

None

52MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

(1) 1M x 36

64MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

128KB

(4) 32K x 8

None

(1) 32K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

J16

J17

128KB

Pins 1 & 2 closed

Pins 1 & 2 closed

256KB

Pins 2 & 3 closed

Pins 2 & 3 closed

VIDEO MEMORY CONFIGURATION

Note: The size and location of the video memory is unidentified.

CPU TYPE SELECTION (SX SYSTEM BOARDS)

Type

J23

J24

J25

80486SX

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

486SX/80487SX

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

486SX/ODP486

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

486SX/Pentium ODP

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

CPU TYPE SELECTION (DX, DX2 SYSTEM BOARDS)

Type

J23

J24

J25

80486DX

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

80486DX2

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

Pentium ODP

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 2 & 3 closed