EFA CORPORATION P55TPIO Processor Pentium Processor Speed 75/90/100/120/133/150/166MHz Chip Set Intel Max. Onboard DRAM 128MB Cache 256/512KB BIOS Award Dimensions 290mm x 220mm I/O Options 32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, serial ports (2), VRM connector, cache slot NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Serial port 1 CN1 Power LED & keylock J11 Serial port 2 CN2 IDE interface LED J12 Parallel port CN3 Green PC connector J13 Floppy drive interface CN4 Turbo LED J14 IDE interface 1 CN5 Turbo switch J15 IDE interface 2 CN6 Reset switch J16 VRM connector CN7 32-bit PCI slots PC1 - PC4 Speaker J10 Cache slot SL1 USER CONFIGURABLE SETTINGS Function Jumper Position » Flash BIOS voltage select 5v JP9 pins 1 & 2 closed Flash BIOS voltage select 12v JP9 pins 2 & 3 closed » CMOS memory normal operation JP19 Open CMOS memory clear JP19 Closed DRAM CONFIGURATION Size Bank 0 Bank 1 2MB (2) 256K x 36 NONE 4MB (2) 512K x 36 NONE 4MB (2) 256K x 36 (2) 256K x 36 6MB (2) 512K x 36 (2) 256K x 36 6MB (2) 256K x 36 (2) 512K x 36 8MB (2) 1M x 36 NONE 8MB (2) 512K x 36 (2) 512K x 36 10MB (2) 1M x 36 (2) 256K x 36 10MB (2) 256K x 36 (2) 1M 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 18MB (2) 2M x 36 (2) 256K x 36 18MB (2) 256K x 36 (2) 2M 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 34MB (2) 4M x 36 (2) 256K x 36 34MB (2) 256K x 36 (2) 4M 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 66MB (2) 8M x 36 (2) 256K x 36 66MB (2) 256K x 36 (2) 8M x 36 68MB (2) 8M x 36 (2) 512K x 36 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 DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 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 will also accept non-parity chips. CACHE CONFIGURATION Size Bank 0 TAG SL1 256KB (A) (8) 32K x 8 (1) 32K x 8 Not installed 256KB (B) NONE NONE Installed 512KB (A) (8) 64K x 8 (1) 32K x 8 Not installed 512KB (B) NONE NONE Installed CACHE JUMPER CONFIGURATION Size JP10 JP11 JP12 JP20 None pins 1 & 2 pins 1 & 2 pins 1 & 2 Open closed closed closed 256KB pins 2 & 3 pins 2 & 3 pins 1 & 2 pins 1 & 2, 3 (A) closed closed closed & 4 closed 256KB Open Open Open Open (B) 512KB pins 1 & 2 pins 1 & 2 pins 2 & 3 pins 1 & 2, 3 (A) closed closed closed & 4 closed 512KB Open Open Open Open (B) CACHE VOLTAGE CONFIGURATION Voltage JP8 Mixed mode pins 1 & 2 closed 3.3v pins 2 & 3 closed CPU CLOCK SPEED CONFIGURATION Speed JP6 JP7 JP18 50MHz pins 2 & 3 pins 2 & 3 pins 1 & 2 closed closed closed 60MHz pins 1 & 2 pins 2 & 3 pins 2 & 3 closed closed closed 66MHz pins 2 & 3 pins 1 & 2 pins 2 & 3 closed closed closed CPU CLOCK RATIO CONFIGURATION Core/bus ratio JP14 JP15 1.5 pins 1 & 2 closed pins 1 & 2 closed 2 pins 2 & 3 closed pins 1 & 2 closed 2.5 pins 2 & 3 closed pins 2 & 3 closed 3 pins 1 & 2 closed pins 2 & 3 closed CPU VOLTAGE CONFIGURATION Voltage JP17 3.3v pins 1 & 2 closed 3.4v pins 2 & 3 closed 3.5v pins 4 & 5 closed VRM CONFIGURATION CPU type CN7 P54C pins 4 & 5, 6 & 7, 19 & 20, 21 & 22 closed P55C VRM installed Note: Pin 1 is shown for clarification purposes only.