ST586 REV. P550 PCI MB Motherboard Settings and Configuration

Processor	CX M1/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	AMI/Award
Dimensions	280mm x 220mm
I/O Options	32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, serial ports (2), cache slot, VRM connector
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Serial port 2	J1	Turbo LED	J11 pins 2 & 3
Serial port 1	J2	Green PC connector	J11 pins 4 & 5
Floppy drive interface	J3	Turbo switch	J11 pins 6 & 7
Parallel port	J4	Reset switch	J11 pins 9 & 10
IDE interface 2	J5	Power LED & keylock	J11 pins 11 - 15
IDE interface 1	J6	Speaker	J11 pins 17 - 20
VRM connector	J8	32-bit PCI slots	PC1 - PC4
External battery	J9	Cache slot	SL1
IDE interface LED	J10

USER CONFIGURABLE SETTINGS
Function		Label	Position
	Jumper information unavailable	J12	Unidentified
»	Flash BIOS voltage select 5v	JP4	Pins 1 & 2 closed
	Flash BIOS voltage select 12v	JP4	Pins 2 & 3 closed
»	CMOS memory normal operation	JP5	Open
	CMOS memory clear	JP5	Closed
»	Parallel port IRQ select IRQ7	JR1	Pins 1 & 2 closed
	Parallel port IRQ select IRQ5	JR1	Pins 2 & 3 closed

DRAM 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) 1M x 36	(2) 2M x 36
32MB	(2) 4M x 36	None
32MB	(2) 2M x 36	(2) 2M x 36
40MB	(2) 1M x 36	(2) 4M x 36
48MB	(2) 2M x 36	(2) 4M x 36
64MB	(2) 8M x 36	None
64MB	(2) 4M x 36	(2) 4M x 36
72MB	(2) 1M x 36	(2) 8M x 36
80MB	(2) 2M x 36	(2) 8M x 36
96MB	(2) 4M x 36	(2) 8M x 36
128MB	(2) 8M x 36	(2) 8M x 36
128MB	(2) 16M x 36	None

CACHE CONFIGURATION
Size	Bank 0	TAG	SL1
256KB (A)	(8) 32K x 8	(1) 8K x 8	Not installed
256KB (B)	None	(1) 8K x 8	256KB module installed
512KB (A)	(8) 64K x 8	(1) 32K x 8	Not installed
512KB (B)	None	(1) 32K x 8	512KB module installed

CACHE JUMPER CONFIGURATION
Size	JP7	JP9
None	Pins 1 & 2 closed	Pins 1 & 2, 4 & 5 closed
256KB (A)	Pins 2 & 3 closed	Pins 1 & 2, 5 & 6 closed
256KB (B)	Open	Open
512KB (A)	Pins 1 & 2 closed	Pins 2 & 3, 4 & 5 closed
512KB (B)	Open	Open

CACHE VOLTAGE CONFIGURATION
Size		JP6
	3.3v	Pins 2 & 3 closed
»	5v mixed	Pins 1 & 2 closed

CPU SPEED SELECTION (CYRIX)
Speed	JP1	JP2	JP3	JP8
120MHz	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 1 & 2, 5 & 6 closed
150MHz	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 1 & 2, 5 & 6 closed
166MHz	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 1 & 2, 5 & 6 closed

CPU SPEED SELECTION (INTEL)
Speed	JP1	JP2	JP3	JP8
75MHz	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 1 & 2, 4 & 5 closed
90MHz	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 1 & 2, 4 & 5 closed
100MHz	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 1 & 2, 4 & 5 closed
120MHz	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 1 & 2, 5 & 6 closed
133MHz	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 1 & 2, 5 & 6 closed
150MHz	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 2 & 3, 5 & 6 closed
166MHz	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 2 & 3, 5 & 6 closed

CPU VOLTAGE SELECTION
Voltage		JP10
	3.3v	Pins 1 & 2 closed
»	3.4v	Pins 2 & 3 closed
	3.5v	Pins 4 & 5 closed

CPU VOLTAGE SELECTION
Setting	J8
Regular CPU voltage	Pins 4 & 5, 6 & 7, 19 & 20, 21 & 22 closed
VRM module for CPU voltage	Open

DMA CHANNEL SELECTION
Channel		JR2
»	1	Pins 1 & 2, 4 & 5 closed
	3	Pins 2 & 3, 5 & 6 closed