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PS486

TEXAS MICROSYSTEMS, INC.

PS486

Processor

80486SX/80486DX/80486DX2/80486DX4/P24D/P24T

Processor Speed

33/66(internal)/100(internal)MHz

Chip Set

Intel

Video Chip Set

None

Maximum Onboard Memory

128MB

Maximum Video Memory

None

Cache

128/256KB

BIOS

Phoenix

Dimensions

337mm x 122mm

I/O Options

AUI connector, floppy drive interface, IDE interface, SCSI interface, parallel port, PS/2 mouse port, serial ports (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

SCSI interface

CN1

PS/2 mouse port

CN7

IDE interface

CN2

AUI connector

CN8

Floppy drive interface

CN3

AT keyboard connector

CN9

Parallel port

CN4

AUI receive LED

JP4

Serial port 1

CN5

AUI active link LED

JP5

Serial port 2

CN6

Hard drive LED

JP7

USER CONFIGURABLE SETTINGS

Function

Label

Position

Parity select DPU generation

JP2

Pins 1 & 2 closed

 

Parity select CPU generation

JP2

Pins 2 & 3 closed

SCSI speed select 33MHz

JP8

Pins 2 & 3 closed

 

SCSI speed select 40MHz

JP8

Pins 1 & 2 closed

Watchdog timer enabled

JP16

Pins 2 & 3 closed

 

Watchdog timer disabled

JP16

Pins 1 & 2 closed

PS/2 IRQ 12 enabled

JP17

Pins 1 & 2 closed

 

Next Step OS used

JP17

Pins 2 & 3 closed

PCI bus speed select 33MHz

JP23

Pins 2 & 3 closed

 

PCI bus speed select 25MHz

JP23

Pins 1 & 2 closed

Factory configured - do not alter

JP27

Unidentified

Monitor type select color

SW1/1

On

 

Monitor type select monochrome

SW1/1

Off

Flash BIOS enabled

SW1/2

On

 

Flash BIOS disabled

SW1/2

Off

CMOS memory normal operation

SW1/3

Off

 

CMOS memory clear

SW1/3

On

Factory configured - do not alter

SW1/4

Unidentified

DRAM CONFIGURATION

Size

Bank 0

Bank 1

8MB

(2) 1M x 36

None

16MB

(2) 1M x 36

(2) 1M x 36

24MB

(2) 2M x 36

(2) 1M x 36

32MB

(2) 4M x 36

None

40MB

(2) 4M x 36

(2) 1M x 36

48MB

(2) 4M x 36

(2) 2M x 36

64MB

(2) 8M x 36

None

64MB

(2) 4M x 36

(2) 4M x 36

96MB

(2) 8M x 36

(2) 4M x 36

128MB

(2) 8M x 36

(2) 8M x 36

CACHE CONFIGURATION

Note: The location of the cache is unidentified.

CACHE JUMPER CONFIGURATION

Size

JP24

JP25

128KB

Open

Open

256KB

Closed

Closed

CPU TYPE SELECTION

Type

JP1

JP14

JP15

JP18

80486SX

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

80846DX

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

80486DX2

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

80486DX4

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

P24D

Pins 2 & 3 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

P24T

Pins 2 & 3 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

CPU TYPE SELECTION

Type

JP22

Non SL enhanced

Pins 1 & 2 closed

SL enhanced

Pins 2 & 3 closed

CPU CACHE SELECTION

CPU

Cache

JP6

JP12

JP19

80486SX

WT/WT

Pins 5 & 6 closed

Pins 2 & 3 closed

Closed

80486SX

WT/WB

Pins 1 & 2 closed

Pins 1 & 2 closed

Open

80846DX

WT/WT

Pins 5 & 6 closed

Pins 2 & 3 closed

Closed

80846DX

WT/WB

Pins 1 & 2 closed

Pins 1 & 2 closed

Open

80486DX2

WT/WT

Pins 5 & 6 closed

Pins 2 & 3 closed

Closed

80486DX2

WT/WB

Pins 1 & 2 closed

Pins 1 & 2 closed

Open

80486DX4

WT/WB

Pins 5 & 6 closed

Pins 2 & 3 closed

Closed

P24D

WB/WT

Pins 5 & 6 closed

Pins 1 & 2 closed

Closed

CPU MULTIPLIER SELECTION

Multiplier

JP13

2x

Pins 2 & 3 closed

3x

Pins 1 & 2 closed

SERIAL PORT 2 SELECTION

Setting

JP9

JP10

JP11

RS232

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

 

RS422

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

 

RS485

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed