P55-ET Motherboard Settings and Configuration

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
»	SMC chip enabled	J24	Open
	SMC chip disabled	J24	Closed
»	Flash BIOS voltage select 5v	JP6	Pins 1 & 2 closed
	Flash BIOS voltage select 12v	JP6	Pins 2 & 3 closed
	Jumper information unavailable	JP12	Unidentified
»	Clock rate set as AT CLOCK	JP15	Pins 1 & 2 closed
	Clock rate set as 12MHz	JP15	Pins 2 & 3 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1
8MB	(2) 1M x 36	None
16MB	(2) 1M x 36	(2) 1M x 36
16MB	(2) 2M x 36	None
24MB	(2) 1M x 36	(2) 2M x 36
24MB	(2) 2M x 36	(2) 1M x 36
32MB	(2) 2M x 36	(2) 2M x 36
32MB	(2) 4M x 36	None
40MB	(2) 1M x 36	(2) 4M x 36
40MB	(2) 4M x 36	(2) 1M x 36
48MB	(2) 2M x 36	(2) 4M x 36
48MB	(2) 4M x 36	(2) 2M x 36
64MB	(2) 4M x 36	(2) 4M x 36
64MB	(2) 8M x 36	None
72MB	(2) 1M x 36	(2) 8M x 36
72MB	(2) 8M x 36	(2) 1M x 36
80MB	(2) 2M x 36	(2) 8M x 36
80MB	(2) 8M x 36	(2) 2M x 36
96MB	(2) 4M x 36	(2) 8M 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	TAG	SL1
256KB (A)	(2) 32K x 32	None	256KB module installed
256KB (B)	(2) 32K x 32	(1) 8K/16K x 8	Not installed
512KB (A)	(2) 64K x 32	(1) 16K/32K x 8	Not installed
512KB (B)	(2) 32K x 32	(1) 16K/32K x 8	256KB module installed
Note: If 256KB (A) configuration is used, see jumper setting for TP1 below.

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

CACHE JUMPER CONFIGURATION
Size	TP1
Bank 0 enabled	Open
Bank 0 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/P54CS	Pins 1 & 2 closed
P55C/P55CT	Pins 2 & 3 closed

CACHE JUMPER CONFIGURATION (ESCM CACHE MODULE)
Size	JP1
256KB	Pins 1 & 2, 5 & 6 closed
512KB	Pins 2 & 3, 4 & 5 closed