IBM CORPORATION

PC SERVER 520 (TYPE 8641) MODEL EZO, EZV, EZL, EZS, EZE

Processor

Pentium

Processor Speed

90/100MHz

Chip Set

Unidentified

Video Chip Set

None

Maximum Onboard Memory

256MB

Maximum Video Memory

None

Cache

256/512KB

BIOS

Unidentified

Dimensions

355mm x 304mm

I/O Options

32-bit PCI slots (3), floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

PS/2 mouse port

J6

Speaker

W12

Parallel port

J9

Power LED & keylock

W18

Floppy drive interface

J10

IDE interface LED

W24

Serial port 1

J11

CPU fan power

W35

Serial port 2

J12

CPU fan power

W36

IDE interface

J13

32-bit PCI slots

PC1 PC3

USER CONFIGURABLE SETTINGS

Function

Label

Position

Cache type select write back

W1

Open

 

Cache type select write through

W1

Closed

Factory configured - do not alter

W2

Open

Factory configured - do not alter

W10

Pins 2 & 3 closed

Factory configured - do not alter

W11

Unidentified

Factory configured - do not alter

W13

Unidentified

Factory configured - do not alter

W14

Unidentified

Factory configured - do not alter

W15

Unidentified

Factory configured - do not alter

W16

Pins 1 & 2 closed

Factory configured - do not alter

W17

Closed

Monitor type select color

W20

Closed

 

Monitor type select monochrome

W20

Open

Keyboard type select PS/2

W21

Closed

 

Keyboard type select AT

W21

Open

Factory configured - do not alter

W22

Open

Factory configured - do not alter

W23

Open

IDE IRQ select IRQ14

W25

Pins 1 & 2 closed

 

IDE IRQ select IRQ15

W25

Pins 2 & 3 closed

Factory configured - do not alter

W30

Open

Factory configured - do not alter

W32

Unidentified

Factory configured - do not alter

W33

Unidentified

Factory configured - do not alter

W34

Unidentified

Factory configured - do not alter

W37

Unidentified

Factory configured - do not alter

W88

Unidentified

Factory configured - do not alter

WU

Unidentified

SIMM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

8MB

(2) 1M x 36

None

None

None

16MB

(2) 2M x 36

None

None

None

16MB

(2) 1M x 36

(2) 1M x 36

None

None

24MB

(2) 2M x 36

(2) 1M x 36

None

None

24MB

(2) 1M x 36

(2) 1M x 36

(2) 1M x 36

None

32MB

(2) 4M x 36

None

None

None

32MB

(2) 2M x 36

(2) 2M x 36

None

None

32MB

(2) 1M x 36

(2) 1M x 36

(2) 1M x 36

(2) 1M x 36

40MB

(2) 4M x 36

(2) 1M x 36

None

None

48MB

(2) 4M x 36

(2) 2M x 36

None

None

48MB

(2) 2M x 36

(2) 2M x 36

(2) 2M x 36

None

64MB

(2) 4M x 36

(2) 2M x 36

(2) 2M x 36

None

64MB

(2) 8M x 36

None

None

None

64MB

(2) 4M x 36

(2) 4M x 36

None

None

64MB

(2) 2M x 36

(2) 2M x 36

(2) 2M x 36

(2) 2M x 36

72MB

(2) 8M x 36

(2) 1M x 36

None

None

80MB

(2) 8M x 36

(2) 1M x 36

(2) 1M x 36

None

80MB

(2) 4M x 36

(2) 2M x 36

(2) 2M x 36

(2) 2M x 36

80MB

(2) 8M x 36

(2) 2M x 36

None

None

88MB

(2) 8M x 36

(2) 1M x 36

(2) 1M x 36

(2) 1M x 36

96MB

(2) 8M x 36

(2) 2M x 36

(2) 2M x 36

None

96MB

(2) 8M x 36

(2) 4M x 36

None

None

96MB

(2) 4M x 36

(2) 4M x 36

(2) 4M x 36

None

112MB

(2) 8M x 36

(2) 2M x 36

(2) 2M x 36

(2) 2M x 36

128MB

(2) 8M x 36

(2) 4M x 36

(2) 4M x 36

None

128MB

(2) 8M x 36

(2) 8M x 36

None

None

128MB

(2) 4M x 36

(2) 4M x 36

(2) 4M x 36

(2) 4M x 36

160MB

(2) 8M x 36

(2) 4M x 36

(2) 4M x 36

(2) 4M x 36

192MB

(2) 8M x 36

(2) 8M x 36

(2) 8M x 36

None

256MB

(2) 8M x 36

(2) 8M x 36

(2) 8M x 36

(2) 8M x 36

CACHE CONFIGURATION

Size

Bank 0

Bank 1

256KB

(4) 32K x 8

(4) 32K x 8

512KB

(4) 64K x 8

(4) 64K x 8

CACHE JUMPER CONFIGURATION

Size

W5

256KB

Pins 1 & 2 closed

512KB

Pins 2 & 3 closed

CPU SPEED SELECTION

Speed

W6

90MHz

Pins 1 & 2 closed

100MHz

Pins 2 & 3 closed