EFA CORPORATION
P55TPIO-B/P55TSPIO-B
| 
 Processor  | 
 CX M1/Pentium  | 
| 
 Processor Speed  | 
 75/90/100/120/133/150/166/200MHz  | 
| 
 Chip Set  | 
 Intel  | 
| 
 Video Chip Set  | 
 None  | 
| 
 Maximum Onboard Memory  | 
 128MB  | 
| 
 Maximum Video Memory  | 
 None  | 
| 
 Cache  | 
 256/512KB  | 
| 
 BIOS  | 
 Award  | 
| 
 Dimensions  | 
 290mm x 220mm  | 
| 
 I/O Options  | 
 32-bit PCI slots (3), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, serial ports (2), audio bus slot, VRM connector  | 
| 
 NPU Options  | 
 None  | 
| 
 CONNECTIONS  | |||
| 
 Purpose  | 
 Location  | 
 Purpose  | 
 Location  | 
| 
 Serial port 2  | 
 J2  | 
 IDE interface LED  | 
 J14  | 
| 
 Serial port 1  | 
 J3  | 
 Green PC connector  | 
 J15  | 
| 
 Floppy drive interface  | 
 J6  | 
 Turbo LED  | 
 J16  | 
| 
 Parallel port  | 
 J7  | 
 Turbo switch  | 
 J17  | 
| 
 IDE interface 2  | 
 J8  | 
 Reset switch  | 
 J18  | 
| 
 IDE interface 1  | 
 J9  | 
 32-bit PCI slots  | 
 PC1 - PC3  | 
| 
 Speaker  | 
 J12  | 
 Audio bus slot  | 
 SL1  | 
| 
 Power LED & keylock  | 
 J13  | 
 VRM connector  | 
 VRM  | 
| 
 USER CONFIGURABLE SETTINGS  | |||
| 
 Function  | 
 Label  | 
 Position  | |
| 
 Sound interface enabled  | 
 JP2  | 
 Open  | |
| 
 Sound interface disabled  | 
 JP2  | 
 Closed  | |
| 
 »  | 
 Flash BIOS voltage select 5v  | 
 JP5  | 
 Pins 1 & 2 closed  | 
| 
 Flash BIOS voltage select 12v  | 
 JP5  | 
 Pins 2 & 3 closed  | |
| 
 »  | 
 CMOS memory normal operation  | 
 JP12  | 
 Open  | 
| 
 CMOS memory clear  | 
 JP12  | 
 Closed  | |
| 
 DRAM CONFIGURATION  | ||
| 
 Size  | 
 Bank 0  | 
 Bank 1  | 
| 
 4MB  | 
 (2) 512K x 36  | 
 None  | 
| 
 8MB  | 
 (2) 1M x 36  | 
 None  | 
| 
 8MB  | 
 (2) 512K x 36  | 
 (2) 512K x 36  | 
| 
 12MB  | 
 (2) 1M x 36  | 
 (2) 512K x 36  | 
| 
 12MB  | 
 (2) 512K x 36  | 
 (2) 1M x 36  | 
| 
 16MB  | 
 (2) 2M x 36  | 
 None  | 
| 
 16MB  | 
 (2) 1M x 36  | 
 (2) 1M x 36  | 
| 
 20MB  | 
 (2) 2M x 36  | 
 (2) 512K x 36  | 
| 
 20MB  | 
 (2) 512K x 36  | 
 (2) 2M x 36  | 
| 
 24MB  | 
 (2) 2M 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  | 
| 
 36MB  | 
 (2) 4M x 36  | 
 (2) 512K x 36  | 
| 
 36MB  | 
 (2) 512K x 36  | 
 (2) 4M x 36  | 
| 
 40MB  | 
 (2) 4M x 36  | 
 (2) 1M x 36  | 
| 
 40MB  | 
 (2) 1M x 36  | 
 (2) 4M x 36  | 
| 
 48MB  | 
 (2) 4M x 36  | 
 (2) 2M 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  | 
| 
 68MB  | 
 (2) 8M x 36  | 
 (2) 512K x 36  | 
| 
 DRAM CONFIGURATION (CON’T)  | ||
| 
 Size  | 
 Bank 0  | 
 Bank 1  | 
| 
 68MB  | 
 (2) 512K x 36  | 
 (2) 8M x 36  | 
| 
 72MB  | 
 (2) 8M x 36  | 
 (2) 1M x 36  | 
| 
 72MB  | 
 (2) 1M x 36  | 
 (2) 8M x 36  | 
| 
 80MB  | 
 (2) 8M x 36  | 
 (2) 2M x 36  | 
| 
 80MB  | 
 (2) 2M x 36  | 
 (2) 8M x 36  | 
| 
 96MB  | 
 (2) 8M x 36  | 
 (2) 4M x 36  | 
| 
 96MB  | 
 (2) 4M x 36  | 
 (2) 8M x 36  | 
| 
 128MB  | 
 (2) 8M x 36  | 
 (2) 8M x 36  | 
| 
 Note: Board also accepts x 32 SIMMs.  | ||
| 
 CACHE CONFIGURATION  | |||
| 
 Size  | 
 Bank 0  | 
 Bank 1  | 
 TAG  | 
| 
 256KB  | 
 (2) 32K x 32  | 
 None  | 
 (1) 16K/32K x 8  | 
| 
 512KB  | 
 (2) 32K x 32  | 
 (2) 32K x 32  | 
 (1) 16K/32K x 8  | 
| 
 Note: The location of the TAG is unidentified.  | |||
| 
 CPU SPEED SELECTION  | |||
| 
 Speed  | 
 JP3  | 
 JP4  | 
 JP11  | 
| 
 75MHz  | 
 Pins 2 & 3 closed  | 
 Pins 2 & 3 closed  | 
 Pins 1 & 2 closed  | 
| 
 90MHz  | 
 Pins 2 & 3 closed  | 
 Pins 1 & 2 closed  | 
 Pins 2 & 3 closed  | 
| 
 100MHz  | 
 Pins 1 & 2 closed  | 
 Pins 2 & 3 closed  | 
 Pins 2 & 3 closed  | 
| 
 120MHz  | 
 Pins 2 & 3 closed  | 
 Pins 1 & 2 closed  | 
 Pins 2 & 3 closed  | 
| 
 133MHz  | 
 Pins 1 & 2 closed  | 
 Pins 2 & 3 closed  | 
 Pins 2 & 3 closed  | 
| 
 150MHz  | 
 Pins 2 & 3 closed  | 
 Pins 2 & 3 closed  | 
 Pins 1 & 2 closed  | 
| 
 166MHz  | 
 Pins 1 & 2 closed  | 
 Pins 2 & 3 closed  | 
 Pins 2 & 3 closed  | 
| 
 180MHz  | 
 Pins 2 & 3 closed  | 
 Pins 1 & 2 closed  | 
 Pins 2 & 3 closed  | 
| 
 200MHz  | 
 Pins 1 & 2 closed  | 
 Pins 2 & 3 closed  | 
 Pins 2 & 3 closed  | 
| 
 CPU MULTIPLIER SELECTION (CYRIX)  | ||
| 
 Multiplier  | 
 JP7  | 
 JP8  | 
| 
 1x  | 
 Pins 2 & 3 closed  | 
 Pins 2 & 3 closed  | 
| 
 2x  | 
 Pins 2 & 3 closed  | 
 Pins 1 & 2 closed  | 
| 
 3x  | 
 Pins 1 & 2 closed  | 
 Pins 2 & 3 closed  | 
| 
 4x  | 
 Pins 1 & 2 closed  | 
 Pins 1 & 2 closed  | 
| 
 CPU MULTIPLIER SELECTION (INTEL)  | ||
| 
 Multiplier  | 
 JP7  | 
 JP8  | 
| 
 1.5x  | 
 Pins 1 & 2 closed  | 
 Pins 1 & 2 closed  | 
| 
 2x  | 
 Pins 2 & 3 closed  | 
 Pins 1 & 2 closed  | 
| 
 2.5x  | 
 Pins 2 & 3 closed  | 
 Pins 2 & 3 closed  | 
| 
 3x  | 
 Pins 1 & 2 closed  | 
 Pins 2 & 3 closed  | 
| 
 CPU VOLTAGE SELECTION  | |
| 
 Voltage  | 
 JP10  | 
| 
 3.3v (STD)  | 
 Pins 1 & 2 closed  | 
| 
 3.4v (VR)  | 
 Pins 2 & 3 closed  | 
| 
 3.5v (VRE)  | 
 Pins 4 & 5 closed  | 
| 
 3.3v/2.5v  | 
 VRM installed  | 
| 
 VRM SELECTION  | |
| 
 Type  | 
 VRM  | 
| 
 All P54C  | 
 Pins 17 & 19, 18 & 20, 21 & 23, 22 & 24 closed  | 
| 
 P55C  | 
 VRM installed  |