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PC 330-486, PC 350-486

IBM CORPORATION

PC 330-486, PC 350-486

Processor

80486SX/486 Overdrive/80486DX/80486DX2/80486DX4/P24T

Processor Speed

20/25/33/40/50(internal)/50/66(internal)/75(internal)/ 100(internal)MHz

Chip Set

Unidentified

Video Chip Set

None

Maximum Onboard Memory

128MB

Maximum Video Memory

Unidentified

Cache

128/256KB

BIOS

Unidentified

Dimensions

330mm x 218mm

I/O Options

32-bit VESA/PCI local bus slot, floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2),VESA feature connector, VGA port, riser slot, VRM connector

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED

CN1

IDE interface 2

J10

IDE interface LED

CN2

VESA feature connector

J14

PS/2 mouse port

J2

Speaker

J27

Serial port 1

J3

On/off switch connector

J29

Serial port 2

J4

On/off switch power supply connector

J30

Parallel port

J5

Riser slot

SL1

VGA port

J6

32-bit VESA/PCI local bus slot

SL2

Floppy drive interface

J7

VRM connector

VRM

IDE interface 1

J9

   

USER CONFIGURABLE SETTINGS

Function

Label

Position

»

Flash BIOS write protect disabled

J13

Pins 2 & 3 closed

 

Flash BIOS write protect enabled

J13

Pins 1 & 2 closed

»

On board video enabled

J15

Pins 1 & 2 closed

 

On board video disabled

J15

Pins 2 & 3 closed

»

Factory configured - do not alter

JP2

Unidentified

»

Modem answers on ring

JP5

Pins 2 & 3 closed

 

Modem does not answer on ring

JP5

Pins 1 & 2 closed

»

Factory configured - do not alter

JP11

Unidentified

»

PS/2 mouse enabled

JP12

Closed

 

PS/2 mouse disabled

JP12

Open

»

CMOS memory normal operation

JP14

Pins 1 & 2 closed

 

CMOS memory clear

JP14

Pins 2 & 3 closed

»

VGA IRQ9 enabled

JP15

Closed

 

VGA IRQ9 disabled

JP15

Open

»

Floppy drive write protect disabled

WP

Open

 

Floppy drive write protect enabled

WP

Closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

4MB

(1) 1M x 32

None

None

None

8MB

(1) 1M x 32

(1) 1M x 32

None

None

8MB

(1) 2M x 32

None

None

None

12MB

(1) 1M x 32

(1) 1M x 32

(1) 1M x 32

None

12MB

(1) 1M x 32

(1) 2M x 32

None

None

16MB

(1) 4M x 32

None

None

None

16MB

(1) 1M x 32

(1) 1M x 32

(1) 2M x 32

None

16MB

(1) 2M x 32

(1) 2M x 32

None

None

16MB

(1) 1M x 32

(1) 1M x 32

(1) 1M x 32

(1) 1M x 32

20MB

(1) 1M x 32

(1) 2M x 32

(1) 2M x 32

None

20MB

(1) 1M x 32

(1) 4M x 32

None

None

DRAM CONFIGURATION (CON’T)

Size

Bank 0

Bank 1

Bank 2

Bank 3

24MB

(1) 2M x 32

(1) 2M x 32

(1) 2M x 32

None

24MB

(1) 1M x 32

(1) 1M x 32

(1) 2M x 32

(1) 2M x 32

24MB

(1) 1M x 32

(1) 1M x 32

(1) 4M x 32

None

28MB

(1) 1M x 32

(1) 2M x 32

(1) 2M x 32

(1) 2M x 32

28MB

(1) 1M x 32

(1) 1M x 32

(1) 4M x 32

(1) 1M x 32

32MB

(1) 4M x 32

(1) 4M x 32

None

None

32MB

(1) 8M x 32

None

None

None

32MB

(1) 2M x 32

(1) 2M x 32

(1) 4M x 32

None

32MB

(1) 2M x 32

(1) 2M x 32

(1) 2M x 32

(1) 2M x 32

36MB

(1) 1M x 32

(1) 4M x 32

(1) 4M x 32

None

40MB

(1) 1M x 32

(1) 1M x 32

(1) 8M x 32

None

40MB

(1) 1M x 32

(1) 1M x 32

(1) 4M x 32

(1) 4M x 32

48MB

(1) 4M x 32

(1) 4M x 32

(1) 4M x 32

None

48MB

(1) 2M x 32

(1) 2M x 32

(1) 8M x 32

None

48MB

(1) 2M x 32

(1) 2M x 32

(1) 4M x 32

(1) 4M x 32

52MB

(1) 1M x 32

(1) 4M x 32

(1) 4M x 32

(1) 4M x 32

64MB

(1) 8M x 32

(1) 8M x 32

None

None

64MB

(1) 4M x 32

(1) 4M x 32

(1) 8M x 32

None

64MB

(1) 4M x 32

(1) 4M x 32

(1) 4M x 32

(1) 4M x 32

68MB

(1) 1M x 32

(1) 8M x 32

(1) 4M x 32

(1) 4M x 32

72MB

(1) 1M x 32

(1) 1M x 32

(1) 8M x 32

(1) 8M x 32

80MB

(1) 2M x 32

(1) 2M x 32

(1) 8M x 32

(1) 8M x 32

84MB

(1) 1M x 32

(1) 8M x 32

(1) 8M x 32

(1) 4M x 32

96MB

(1) 8M x 32

(1) 8M x 32

(1) 8M x 32

None

96MB

(1) 4M x 32

(1) 4M x 32

(1) 8M x 32

(1) 8M x 32

100MB

(1) 1M x 32

(1) 8M x 32

(1) 8M x 32

(1) 8M x 32

128MB

(1) 8M x 32

(1) 8M x 32

(1) 8M x 32

(1) 8M x 32

Note: Board also accepts x 36 SIMMs.

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

J38

128KB

Pins 2 & 3 closed

Open

Open

256KB

Pins 1 & 2 closed

Closed

Open

CPU SPEED SELECTION

Speed

J35

J36

J37

20MHz

Closed

Open

Open

25MHz

Open

Closed

Closed

33MHz

Open

Closed

Open

40MHz

Open

Open

Closed

50iMHz

Open

Closed

Closed

50MHz

Open

Open

Open

66iMHz

Open

Closed

Open

75iMHz

Open

Closed

Closed

100iMHz

Open

Closed

Open

CPU TYPE SELECTION

Type

J23

J24

80486SX

Pins 1 & 2 closed

Open

486 Overdrive

Pins 2 & 3 closed

Open

80486DX

Pins 2 & 3 closed

Open

80486DX2

Pins 2 & 3 closed

Open

80486DX4

Pins 2 & 3 closed

Open

P24T

Pins 2 & 3 closed

Closed

CPU MULTIPLIER SELECTION (80486DX4 ONLY)

Multiplier

JP10

Other multiplier

Pins 1 & 2 closed

2x

Pins 3 & 4 closed

3x

Open

LOCAL BUS SELECTION ON RISER SLOT

Setting

JP3

JP4

JP7

JP13

VESA local bus

Pins 1 & 2 closed

Pins 1 & 2 closed

Open

Closed

PCI local bus

Pins 2 & 3 closed

Pins 2 & 3 closed

Closed

Open

DMA CHANNEL SELECTION

Channel

JP8

JP9

1

Pins 2 & 3 closed

Pins 2 & 3 closed

3

Pins 1 & 2 closed

Pins 1 & 2 closed