PC SERVER 520 (TYPE 8641) MODEL EZO, EZV, EZL, EZS, EZE Motherboard Settings and Configuration

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

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PC SERVER 520 (TYPE 8641) MODEL EZO, EZV, EZL, EZS, EZE Motherboard Settings and Configuration

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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