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ST586 REV. P550 PCI MB

SPRING CIRCLE COMPUTER, INC.

ST586 REV. P550 PCI MB

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