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IPC VALUEMAGIC SERIES DESKTOP

IPC CORPORATION, LTD.

IPC VALUEMAGIC SERIES DESKTOP

MB486HE#21

Processor

80486SX/80487SX/80486DX/ODP486SX/80486DX2/Pentium Overdrive

Processor Speed

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

Chip Set

UMC

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Turbo switch

J1

Reset switch

J4

Turbo LED

J2

Power LED & keylock

J5

Speaker

J3

External battery

J6

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

High speed write wait state select 1 wait state

W22

Closed

 

High speed write wait state select 0 wait states

W22

Open

»

Factory configured - do not alter

W23

Open

»

CPU clock select 1x

W24

Open

 

CPU clock select 2x

W24

Closed

»

Factory configured - do not alter

W25

Open

»

Monitor type select color

W26

Closed

 

Monitor type select monochrome

W26

Open

»

CMOS memory normal operation

W27

Closed

 

CMOS memory clear

W27

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

4MB

(4) 1M x 9

NONE

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

128KB

(4) 32K x 8

NONE

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

W1

W2

W3

W4

W5

W6

W7

64KB

Closed

Closed

1 & 2

1 & 2

1 & 2

Open

Open

128KB

Closed

Closed

2 & 3

1 & 2

2 & 3

1 & 2

Open

256KB

Closed

Closed

2 & 3

2 & 3

1 & 2

2 & 3

Open

Note: Pins designated should be in the closed position..

CACHE JUMPER CONFIGURATION (CON’T)

Size

W13

W14

W15

W16

W17

W18

W19

W20

64KB

Open

Open

Open

Open

Open

Open

Open

Open

128KB

Closed

Open

Open

Open

Open

Open

Open

Closed

256KB

Closed

Closed

Open

Open

Open

Open

Closed

Closed

Note: The location of the above jumpers are unidentified.

CPU TYPE CONFIGURATION

Type

W8

W9

W10

W11

W12

80486SX (PQFP)

1 & 2

Open

Open

1 & 2

Open

80486SX (PGA)

Open

Open

2 & 3

Open

2 & 3

ODP486SX

1 & 2

Open

1 & 2, 3 & 4

Open

1 & 2

80487SX

1 & 2

Open

1 & 2, 3 & 4

Open

1 & 2

80486DX (PQFP)

2 & 3

Closed

Closed

1 & 2

Open

80486DX (PGA)

2 & 3

Open

1 & 2, 3 & 4

Open

2 & 3

80486DX2

2 & 3

Open

1 & 2, 3 & 4

Open

2 & 3

Pentium Overdrive

1 & 2

Open

1 & 2, 3 & 4

Open

1 & 2

Note: Pins designated should be in the closed position. The locations of W8 & W9 are unidentified.

CPU SPEED CONFIGURATION

Speed

W21

25MHz

Open

33MHz

Open

50iMHz

Closed

66iMHz

Closed