P55-ET Motherboard Settings and Configuration

EPOX COMPUTER CO., LTD.

P55-ET

Processor
Pentium
Processor Speed
75/90/100/120/133/150/166MHz
Chip Set
Intel
Video Chip Set
None
Maximum Onboard Memory
128MB (EDO supported)
Maximum Video Memory
None
Cache
256/512KB
BIOS
Award
Dimensions
330mm x 218mm
I/O Options
32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, PS/2 mouse interface, serial ports (2), cache slot, VRM connector
NPU Options
None

CONNECTIONS
Purpose
Location
Purpose
Location
Serial port 2
CN1
Turbo switch
J4
Serial port 1
CN2
Turbo LED
J5
Parallel port
CN3
Green PC LED
J6
Floppy drive interface
CN4
Chassis fan power
J7
IDE interface 2
CN5
PS/2 mouse interface
J10
IDE interface 1
CN6
IDE interface LED
JP5
PS/2 mouse port
CN7
Green PC connector
JP14
Power LED & keylock
J1
32-bit PCI slots
PC1 – PC4
Speaker
J2
Cache slot
SL1
Reset switch
J3
VRM connector
VRM

USER CONFIGURABLE SETTINGS
Function
Label
Position
»
On board I/O enabled
J24
Open

On board I/O disabled
J24
Closed
»
Flash BIOS voltage select 5v
JP6
Pins 1 & 2 closed

Flash BIOS voltage select 12v
JP6
Pins 2 & 3 closed
»
Factory configured - do not alter
JP12
Unidentified

SIMM CONFIGURATION
Size
Bank 0
Bank 1
8MB
(2) 1M x 36
None
16MB
(2) 2M 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
32MB
(2) 2M x 36
(2) 2M x 36
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
72MB
(2) 8M x 36
(2) 1M x 36
80MB
(2) 8M x 36
(2) 2M x 36
96MB
(2) 8M x 36
(2) 4M x 36
128MB
(2) 8M x 36
(2) 8M x 36
Note: Board accepts EDO memory. Board also accepts x 32 SIMMs.

CACHE CONFIGURATION
Size
Bank 0
SL1
TAG
256KB (A)
(2) 32K x 32
Not installed
(1) 8K/16K x 8
512KB (B)
(2) 64K x 32
Not installed
(1) 16K/32K x 8
512KB (A)
(2) 32K x 32
256KB module installed
(1) 16K/32K x 8

CACHE JUMPER CONFIGURATION
Size
JP10
JP11
256KB (A)
Pins 1 & 2 closed
Pins 1 & 2 closed
512KB (B)
Pins 1 & 2 closed
Pins 1 & 2 closed
512KB (A)
Pins 2 & 3 closed
Pins 2 & 3 closed

ON BOARD CACHE CONFIGURATION
Setting
TP1
Enabled
Open
Disabled
Pins 1 & 2, 3 & 4 closed

CPU SPEED SELECTION
CPU speed
Clock speed
Multiplier
J25
JP7
JP9
JPS1
JPS2
75MHz
50MHz
1.5x
1 & 2
2 & 3
2 & 3
Open
Open
90MHz
60MHz
1.5x
2 & 3
2 & 3
2 & 3
Closed
Open
100MHz
66MHz
1.5x
2 & 3
2 & 3
2 & 3
Closed
Closed
120MHz
60MHz
2x
2 & 3
1 & 2
2 & 3
Closed
Open
133MHz
66MHz
2x
2 & 3
1 & 2
2 & 3
Closed
Closed
150MHz
60MHz
2.5x
2 & 3
1 & 2
1 & 2
Closed
Open
166MHz
66MHz
2.5x
2 & 3
1 & 2
1 & 2
Closed
Closed
Note: Pins designated should be in the closed position.

CPU TYPE SELECTION
Type
JP1
P54C
Pins 1 & 2 closed
P55C
Pins 2 & 3 closed

KEYBOARD CLOCK SELECTION
Setting
JP15A
JP15B
»
Set by system AT CLOCK
Pins 1 & 2 closed
Pins 1 & 2 closed

Clock rate – 12MHz
Pins 2 & 3 closed
Pins 2 & 3 closed

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P55-ET Motherboard Settings and Configuration

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Processor	Pentium
Processor Speed	75/90/100/120/133/150/166MHz
Chip Set	Intel
Video Chip Set	None
Maximum Onboard Memory	128MB (EDO supported)
Maximum Video Memory	None
Cache	256/512KB
BIOS	Award
Dimensions	330mm x 218mm
I/O Options	32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, PS/2 mouse interface, serial ports (2), cache slot, VRM connector
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Serial port 2	CN1	Turbo switch	J4
Serial port 1	CN2	Turbo LED	J5
Parallel port	CN3	Green PC LED	J6
Floppy drive interface	CN4	Chassis fan power	J7
IDE interface 2	CN5	PS/2 mouse interface	J10
IDE interface 1	CN6	IDE interface LED	JP5
PS/2 mouse port	CN7	Green PC connector	JP14
Power LED & keylock	J1	32-bit PCI slots	PC1 – PC4
Speaker	J2	Cache slot	SL1
Reset switch	J3	VRM connector	VRM

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	On board I/O enabled	J24	Open
	On board I/O disabled	J24	Closed
»	Flash BIOS voltage select 5v	JP6	Pins 1 & 2 closed
	Flash BIOS voltage select 12v	JP6	Pins 2 & 3 closed
»	Factory configured - do not alter	JP12	Unidentified

SIMM CONFIGURATION
Size	Bank 0	Bank 1
8MB	(2) 1M x 36	None
16MB	(2) 2M 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
32MB	(2) 2M x 36	(2) 2M x 36
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
72MB	(2) 8M x 36	(2) 1M x 36
80MB	(2) 8M x 36	(2) 2M x 36
96MB	(2) 8M x 36	(2) 4M x 36
128MB	(2) 8M x 36	(2) 8M x 36
Note: Board accepts EDO memory. Board also accepts x 32 SIMMs.

CACHE CONFIGURATION
Size	Bank 0	SL1	TAG
256KB (A)	(2) 32K x 32	Not installed	(1) 8K/16K x 8
512KB (B)	(2) 64K x 32	Not installed	(1) 16K/32K x 8
512KB (A)	(2) 32K x 32	256KB module installed	(1) 16K/32K x 8

CACHE JUMPER CONFIGURATION
Size	JP10	JP11
256KB (A)	Pins 1 & 2 closed	Pins 1 & 2 closed
512KB (B)	Pins 1 & 2 closed	Pins 1 & 2 closed
512KB (A)	Pins 2 & 3 closed	Pins 2 & 3 closed

ON BOARD CACHE CONFIGURATION
Setting	TP1
Enabled	Open
Disabled	Pins 1 & 2, 3 & 4 closed

CPU SPEED SELECTION
CPU speed	Clock speed	Multiplier	J25	JP7	JP9	JPS1	JPS2
75MHz	50MHz	1.5x	1 & 2	2 & 3	2 & 3	Open	Open
90MHz	60MHz	1.5x	2 & 3	2 & 3	2 & 3	Closed	Open
100MHz	66MHz	1.5x	2 & 3	2 & 3	2 & 3	Closed	Closed
120MHz	60MHz	2x	2 & 3	1 & 2	2 & 3	Closed	Open
133MHz	66MHz	2x	2 & 3	1 & 2	2 & 3	Closed	Closed
150MHz	60MHz	2.5x	2 & 3	1 & 2	1 & 2	Closed	Open
166MHz	66MHz	2.5x	2 & 3	1 & 2	1 & 2	Closed	Closed
Note: Pins designated should be in the closed position.

CPU TYPE SELECTION
Type	JP1
P54C	Pins 1 & 2 closed
P55C	Pins 2 & 3 closed

KEYBOARD CLOCK SELECTION
Setting		JP15A	JP15B
»	Set by system AT CLOCK	Pins 1 & 2 closed	Pins 1 & 2 closed
	Clock rate – 12MHz	Pins 2 & 3 closed	Pins 2 & 3 closed