SOYO COMPUTER CO., LTD.
PENTIUM (P54C) PCI MAINBOARD
Processor | Pentium |
Processor Speed | 90/100MHz |
Chip Set | Unidentified |
Max. Onboard DRAM | 512MB |
Cache | 256/512KB |
BIOS | Award |
Dimensions | 330mm x 218mm |
I/O Options | 32-bit PCI bus slots (4), green PC connector |
NPU Options | None |

CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Power LED & keylock | J17 | Green PC connector | J21 |
Speaker | J18 | Green PC LED | J22 |
Reset switch | J19 | 32-bit PCI bus slots | SL1 - SL4 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | Ppeline address disabled | J24 | Open |
Pipeline address enabled | J24 | Closed | |
» | Cache type select write back | J29 | Open |
Cache type select write through | J29 | Closed | |
» | Monitor type select color | JP3 | Closed |
Monitor type select monochrome | JP3 | Open | |
» | CMOS memory normal operation | JP5 | Open |
CMOS memory clear | JP5 | Closed | |
» | Factory configured - do not alter | JP36 | Closed |
» | Factory configured - do not alter | JP37 | Closed |
» | Factory configured - do not alter | JP38 | Closed |
» | Factory configured - do not alter | JP39 | Open |
» | Factory configured - do not alter | JP40 | Open |
» | Factory configured - do not alter | JP41 | Open |
DRAM CONFIGURATION | ||
Size | Bank 0 | Bank 1 |
2MB | (2) 256K x 36 | NONE |
4MB | (2) 256K x 36 | (2) 256K x 36 |
4MB | (2) 512K x 36 | NONE |
8MB | (2) 512K x 36 | (2) 512K x 36 |
8MB | (2) 1M x 36 | NONE |
10MB | (2) 256K x 36 | (2) 1M 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) 512K x 36 | (2) 2M 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 |
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) 512K x 36 | (2) 8M x 36 |
80MB | (2) 2M x 36 | (2) 8M x 36 |
96MB | (2) 4M x 36 | (2) 8M x 36 |
128MB | (2) 8M x 36 | (2) 8M x 36 |
128MB | (2) 16M x 36 | NONE |
256MB | (2) 16M x 36 | (2) 16M x 36 |
256MB | (2) 32M x 36 | NONE |
512MB | (2) 32M x 36 | (2) 32M x 36 |
CACHE CONFIGURATION | ||
Size | Bank 0 | Bank 1 |
256KB | (4) 32K x 8 | (4) 32K x 8 |
512KB | (4) 64K x 8 | (4) 64K x 8 |
CACHE JUMPER CONFIGURATION | ||
Size | J25 | J26 |
256KB | pins 2 & 3 closed | pins 1 & 2 closed |
512KB | pins 2 & 3 closed | pins 2 & 3 closed |
CPU SPEED CONFIGURATION | |||
Speed | JP31 | JP34 | JP35 |
90MHz | Closed | Open | Open |
100MHz | Open | Closed | Closed |
PCI IRQ CONFIGURATION (IRQ 10) | ||
PIRQ | J44 | J51 |
PIRQ 0 | Open | pins 1 & 2 closed |
PIRQ 1 | Open | pins 2 & 3 closed |
PIRQ 2 | pins 1 & 2 closed | Open |
PIRQ 3 | pins 2 & 3 closed | Open |
PCI IRQ CONFIGURATION (IRQ 11) | ||
PIRQ | J45 | J52 |
PIRQ 0 | Open | pins 1 & 2 closed |
PIRQ 1 | Open | pins 2 & 3 closed |
PIRQ 2 | pins 1 & 2 closed | Open |
PIRQ 3 | pins 2 & 3 closed | Open |
PCI IRQ CONFIGURATION (IRQ 12) | ||
PIRQ | J46 | J53 |
PIRQ 0 | Open | pins 1 & 2 closed |
PIRQ 1 | Open | pins 2 & 3 closed |
PIRQ 2 | pins 1 & 2 closed | Open |
PIRQ 3 | pins 2 & 3 closed | Open |
PCI IRQ CONFIGURATION (IRQ 14) | ||
PIRQ | J47 | J54 |
PIRQ 0 | Open | pins 1 & 2 closed |
PIRQ 1 | Open | pins 2 & 3 closed |
PIRQ 2 | pins 1 & 2 closed | Open |
PIRQ 3 | pins 2 & 3 closed | Open |
PCI IRQ CONFIGURATION (IRQ 15) | ||
PIRQ | J48 | J55 |
PIRQ 0 | Open | pins 1 & 2 closed |
PIRQ 1 | Open | pins 2 & 3 closed |
PIRQ 2 | pins 1 & 2 closed | Open |
PIRQ 3 | pins 2 & 3 closed | Open |
HOST BUS PREQUENCY CONFIGURATION | |
Setting | J30 |
Full speed | Open |
2/3 speed | pins 1 & 2 closed |
1/2 speed | pins 2 & 3 closed |