MITAC INTERNATIONAL COMPUTER
PH5400TX
Device Type | Mainboard |
Processor | CX 6X86/CX 6X86L/AM K5/Pentium/Pentium MMX |
Processor Speed | 75/90/100/120/133/150/166/200MHz |
Chip Set | Intel |
Video Chip Set | None |
Maximum Onboard Memory | 256MB (EDO & SDRAM supported) |
Maximum Video Memory | None |
Cache | 256/512KB |
BIOS | Award |
Dimensions | 254mm 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), IR connector, USB connector |
NPU Options | None |

CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Parallel port | J1 | Green PC connector | J17 |
Floppy drive interface | J2 | Reset switch | J18 |
Serial port 1 | J4 | Speaker | J19 |
Serial port 2 | J6 | IDE interface LED | J20 |
PS/2 mouse interface/USB connector | J7 | IR connector | J22 |
IDE interface 2 | J14 | Power LED & keylock | J23 |
IDE interface 1 | J15 | 32-bit PCI slots | PC1 – PC4 |
USER CONFIGURABLE SETTINGS | |||
Function | Label | Position | |
» | CMOS memory normal operation | JP5 | Pins 1 & 2 closed |
CMOS memory clear | JP5 | Pins 2 & 3 closed | |
DIMM CONFIGURATION | ||
Size | Bank 0 | Bank 1 |
8MB | (1) 1M x 64 | None |
16MB | (1) 2M x 64 | None |
16MB | (1) 1M x 64 | (1) 1M x 64 |
24MB | (1) 2M x 64 | (1) 1M x 64 |
32MB | (1) 4M x 64 | None |
32MB | (1) 2M x 64 | (1) 2M x 64 |
40MB | (1) 4M x 64 | (1) 1M x 64 |
48MB | (1) 4M x 64 | (1) 2M x 64 |
64MB | (1) 8M x 64 | None |
64MB | (1) 4M x 64 | (1) 4M x 64 |
72MB | (1) 8M x 64 | (1) 1M x 64 |
80MB | (1) 8M x 64 | (1) 2M x 64 |
96MB | (1) 8M x 64 | (1) 4M x 64 |
128MB | (1) 16M x 64 | None |
128MB | (1) 8M x 64 | (1) 8M x 64 |
136MB | (1) 16M x 64 | (1) 1M x 64 |
144MB | (1) 16M x 64 | (1) 2M x 64 |
160MB | (1) 16M x 64 | (1) 4M x 64 |
192MB | (1) 16M x 64 | (1) 8M x 64 |
256MB | (1) 16M x 64 | (1) 16M x 64 |
Note: Board accepts EDO & SDRAM memory. | ||
CACHE CONFIGURATION | ||
Size | Bank 0 | TAG |
256KB | (2) 32K x 32 | Unidentified |
512KB | (2) 64K x 32 | Unidentified |
CPU SPEED SELECTION (CX 6X86) | ||||||
CPU speed | Clock speed | Multiplier | JP1 | JP2 | JP3 | JP4 |
120MHz | 50MHz | 2x | 1 & 2 | 1 & 2, 3 & 4 | 2 & 3 | 5 & 6 |
133MHz | 55MHz | 2x | 1 & 2 | 3 & 4 | 2 & 3 | 5 & 6 |
150MHz | 66MHz | 2x | 1 & 2 | 1 & 2 | 2 & 3 | 5 & 6 |
166MHz | 60MHz | 2x | 1 & 2 | Open | 2 & 3 | 5 & 6 |
Note: Pins designated should be in the closed position. | ||||||
CPU SPEED SELECTION (CX 6X86L) | ||||||
CPU speed | Clock speed | Multiplier | JP1 | JP2 | JP3 | JP4 |
166MHz | 60MHz | 2x | 1 & 2 | Open | 2 & 3 | 5 & 6 |
Note: Pins designated should be in the closed position. | ||||||
CPU SPEED SELECTION (AM K5) | ||||||
CPU speed | Clock speed | Multiplier | JP1 | JP2 | JP3 | JP4 |
120MHz | 60MHz | 2x | 1 & 2 | 1 & 2 | * | * |
133MHz | 66MHz | 2x | 1 & 2 | Open | * | * |
150MHz | 60MHz | 2.5x | 1 & 2, 3 & 4 | 1 & 2 | * | * |
166MHz | 66MHz | 2.5x | 1 & 2, 3 & 4 | Open | * | * |
Note: Pins designated should be in the closed position. * = See table below. | ||||||
CPU SPEED SELECTION (INTEL STD) | ||||||
CPU speed | Clock speed | Multiplier | JP1 | JP2 | JP3 | JP4 |
75MHz | 50MHz | 1.5x | Open | 1 & 2, 3 & 4 | 2 & 3 | 5 & 6 |
90MHz | 60MHz | 1.5x | Open | 1 & 2 | 2 & 3 | 5 & 6 |
100MHz | 66MHz | 1.5x | Open | Open | 2 & 3 | 5 & 6 |
120MHz | 60MHz | 2x | 1 & 2 | 1 & 2 | 2 & 3 | 5 & 6 |
133MHz | 66MHz | 2x | 1 & 2 | Open | 2 & 3 | 5 & 6 |
150MHz | 60MHz | 2.5x | 1 & 2, 3 & 4 | 1 & 2 | 2 & 3 | 5 & 6 |
166MHz | 66MHz | 2.5x | 1 & 2, 3 & 4 | Open | 2 & 3 | 5 & 6 |
200MHz | 66MHz | 3x | 3 & 4 | Open | 2 & 3 | 5 & 6 |
CPU SPEED SELECTION (INTEL VRE) | ||||||
CPU speed | Clock speed | Multiplier | JP1 | JP2 | JP3 | JP4 |
75MHz | 50MHz | 1.5x | Open | 1 & 2, 3 & 4 | 1 & 2 | 5 & 6 |
90MHz | 60MHz | 1.5x | Open | 1 & 2 | 1 & 2 | 5 & 6 |
100MHz | 66MHz | 1.5x | Open | Open | 1 & 2 | 5 & 6 |
120MHz | 60MHz | 2x | 1 & 2 | 1 & 2 | 1 & 2 | 5 & 6 |
133MHz | 66MHz | 2x | 1 & 2 | Open | 1 & 2 | 5 & 6 |
150MHz | 60MHz | 2.5x | 1 & 2, 3 & 4 | 1 & 2 | 1 & 2 | 5 & 6 |
166MHz | 66MHz | 2.5x | 1 & 2, 3 & 4 | Open | 1 & 2 | 5 & 6 |
200MHz | 66MHz | 3x | 3 & 4 | Open | 1 & 2 | 5 & 6 |
CPU SPEED SELECTION (INTEL MMX) | ||||||
CPU speed | Clock speed | Multiplier | JP1 | JP2 | JP3 | JP4 |
166MHz | 66MHz | 2.5x | 1 & 2, 3 & 4 | Open | 2 & 3 | 5 & 6 |
200MHz | 66MHz | 3x | 3 & 4 | Open | 2 & 3 | 5 & 6 |
Note: Pins designated should be in the closed position. | ||||||
CPU VOLTAGE SELECTION (AM K5 ONLY) | ||
Voltage code | JP3 | JP4 |
B | 1 & 2 | 5 & 6 |
C | 2 & 3 | 5 & 6 |
F | 2 & 3 | 5 & 6 |
H | 2 & 3 | 7 & 8 |
J | 2 & 3 | 3 & 4 |
K | 2 & 3 | 1 & 2 |