EPOX COMPUTER CO., LTD.
P55-TH
| 
 Processor  | 
 CX M1/Pentium  | 
| 
 Processor Speed  | 
 75/90/100/120/133/150/166/180/200MHz  | 
| 
 Chip Set  | 
 Intel  | 
| 
 Video Chip Set  | 
 None  | 
| 
 Maximum Onboard Memory  | 
 512MB (EDO supported)  | 
| 
 Maximum Video Memory  | 
 None  | 
| 
 Cache  | 
 256/512KB  | 
| 
 BIOS  | 
 Award  | 
| 
 Dimensions  | 
 330mm x 218mm  | 
| 
 I/O Options  | 
 32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse interface, serial ports (2), cache slot, IR connector  | 
| 
 NPU Options  | 
 None  | 
| 
 CONNECTIONS  | |||
| 
 Purpose  | 
 Location  | 
 Purpose  | 
 Location  | 
| 
 Serial port 1  | 
 CN1  | 
 Green PC LED  | 
 J6  | 
| 
 Serial port 2  | 
 CN2  | 
 Chassis fan power  | 
 J7  | 
| 
 Parallel port  | 
 CN3  | 
 PS/2 mouse interface  | 
 J10  | 
| 
 Floppy drive interface  | 
 CN4  | 
 IR connector  | 
 J33  | 
| 
 IDE interface 2  | 
 CN5  | 
 Turbo switch  | 
 J44  | 
| 
 IDE interface 1  | 
 CN6  | 
 IDE interface LED  | 
 JP5  | 
| 
 Power LED & keylock  | 
 J1  | 
 Green PC connector  | 
 JP14  | 
| 
 Speaker  | 
 J2  | 
 32-bit PCI slots  | 
 PC1 - PC4  | 
| 
 Reset switch  | 
 J3  | 
 Cache slot  | 
 SL1  | 
| 
 USER CONFIGURABLE SETTINGS  | |||
| 
 Function  | 
 Label  | 
 Position  | |
| 
 »  | 
 SMC chip enabled  | 
 J24  | 
 Open  | 
| 
 SMC chip disabled  | 
 J24  | 
 Closed  | |
| 
 Flash BIOS voltage select 12v  | 
 JP6  | 
 Pins 2 & 3 closed  | |
| 
 Flash BIOS voltage select 5v  | 
 JP6  | 
 Pins 1 & 2 closed  | |
| 
 »  | 
 Flash BIOS normal operation  | 
 JP8  | 
 Pins 1 & 2 closed  | 
| 
 Flash BIOS boot block enabled  | 
 JP8  | 
 Pins 2 & 3 closed  | |
| 
 »  | 
 Factory configured - do not alter  | 
 JP12  | 
 Unidentified  | 
| 
 »  | 
 Clock rate set as AT CLOCK  | 
 JP15  | 
 Pins 1 & 2 closed  | 
| 
 Clock rate set as 12MHz  | 
 JP15  | 
 Pins 2 & 3 closed  | |
| 
 DRAM CONFIGURATION  | ||
| 
 Size  | 
 Bank 0  | 
 Bank 1  | 
| 
 8MB  | 
 (2) 1M x 36  | 
 None  | 
| 
 16MB  | 
 (2) 1M x 36  | 
 (2) 1M x 36  | 
| 
 16MB  | 
 (2) 2M x 36  | 
 None  | 
| 
 24MB  | 
 (2) 2M x 36  | 
 (2) 1M x 36  | 
| 
 32MB  | 
 (2) 2M x 36  | 
 (2) 2M x 36  | 
| 
 32MB  | 
 (2) 4M x 36  | 
 None  | 
| 
 40MB  | 
 (2) 4M x 36  | 
 (2) 1M x 36  | 
| 
 48MB  | 
 (2) 2M x 36  | 
 (2) 4M x 36  | 
| 
 64MB  | 
 (2) 4M x 36  | 
 (2) 4M x 36  | 
| 
 64MB  | 
 (2) 8M x 36  | 
 None  | 
| 
 72MB  | 
 (2) 8M x 36  | 
 (2) 1M x 36  | 
| 
 80MB  | 
 (2) 8M x 36  | 
 (2) 2M x 36  | 
| 
 96MB  | 
 (2) 4M x 36  | 
 (2) 8M x 36  | 
| 
 96MB  | 
 (2) 8M x 36  | 
 (2) 4M x 36  | 
| 
 128MB  | 
 (2) 8M x 36  | 
 (2) 8M x 36  | 
| 
 256MB  | 
 (2) 16M x 36  | 
 (2) 16M x 36  | 
| 
 512MB  | 
 (2) 32M x 36  | 
 (2) 32M x 36  | 
| 
 Note: Board accepts EDO memory. Board also accepts x 32 SIMMs. Banks are interchangeable.  | ||
| 
 CACHE CONFIGURATION  | |||
| 
 Size  | 
 Bank 0  | 
 TAG  | 
 SL1  | 
| 
 256KB (A)  | 
 (2) 32K x 32  | 
 (1) 32K x 8  | 
 Not installed  | 
| 
 256KB (B)  | 
 None  | 
 None  | 
 256KB module installed  | 
| 
 512KB (A)  | 
 (2) 32K x 32  | 
 (1) 32K x 8  | 
 256KB module installed  | 
| 
 512KB (B)  | 
 (2) 64K x 32  | 
 (1) 32K x 8  | 
 Not installed  | 
| 
 512KB (C)  | 
 None  | 
 None  | 
 512KB module installed  | 
| 
 CACHE JUMPER CONFIGURATION  | ||
| 
 Size  | 
 JP10  | 
 JP11  | 
| 
 256KB (A)  | 
 Pins 1 & 2 closed  | 
 Pins 1 & 2 closed  | 
| 
 256KB (B)  | 
 Pins 1 & 2 closed  | 
 Pins 2 & 3 closed  | 
| 
 512KB (A)  | 
 Pins 1 & 2 closed  | 
 Pins 1 & 2 closed  | 
| 
 512KB (B)  | 
 Pins 2 & 3 closed  | 
 Pins 1 & 2 closed  | 
| 
 512KB (C)  | 
 Pins 1 & 2 closed  | 
 Pins 2 & 3 closed  | 
| 
 CPU SPEED SELECTION (CYRIX)  | ||
| 
 CPU speed  | 
 Clock speed  | 
 JP1  | 
| 
 100MHz  | 
 66MHz  | 
 Pins 10 & 23 closed  | 
| 
 120MHz  | 
 60MHz  | 
 Pins 4 & 17 closed  | 
| 
 133MHz  | 
 66MHz  | 
 Pins 5 & 18 closed  | 
| 
 CPU SPEED SELECTION (INTEL)  | ||
| 
 CPU speed  | 
 Clock speed  | 
 JP1  | 
| 
 75MHz  | 
 50MHz  | 
 Pins 1 & 14 closed  | 
| 
 90MHz  | 
 60MHz  | 
 Pins 2 & 15 closed  | 
| 
 100MHz  | 
 66MHz  | 
 Pins 3 & 16 closed  | 
| 
 120MHz  | 
 60MHz  | 
 Pins 4 & 17 closed  | 
| 
 133MHz  | 
 66MHz  | 
 Pins 5 & 18 closed  | 
| 
 150MHz  | 
 60MHz  | 
 Pins 6 & 19 closed  | 
| 
 166MHz  | 
 66MHz  | 
 Pins 7 & 20 closed  | 
| 
 180MHz  | 
 60MHz  | 
 Pins 8 & 21 closed  | 
| 
 200MHz  | 
 66MHz  | 
 Pins 9 & 22 closed  | 
| 
 CPU TYPE SELECTION  | ||||
| 
 Type  | 
 JP3A  | 
 JP3B  | 
 JP3C  | 
 JP3D  | 
| 
 CX M1  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
| 
 P54C/P54CS/P54CT/P54CTB  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
 1 & 2  | 
| 
 P55C  | 
 2 & 3  | 
 2 & 3  | 
 2 & 3  | 
 2 & 3  | 
| 
 Note: Pins designated should be in the closed position.  | ||||
| 
 CPU AT BUS CLOCK SELECTION  | ||
| 
 Setting  | 
 J25  | |
| » | 
 PCICLK/4  | 
 Pins 2 & 3 closed  | 
| 
 PCICLK/3  | 
 Pins 1 & 2 closed  | |