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 |