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  | |