AMERICAN DIGICOM CORPORATION
486E CACHE MAINBOARD
Processor | 80486SX/80487SX/80486DX/80486DX2 |
Processor Speed | 20/25/33/40/50(internal)/50/66(internal)MHz |
Chip Set | OPTI |
Max. onboard DRAM | 128MB |
SRAM Cache | 64/128/256/512KB |
BIOS | AMI |
Dimensions | 330.2mm x 215.8mm |
I/O Options | None |
NPU Options | 4167 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Speaker | J4 | Turbo LED | JP17 |
Power LED & keylock | J5 | Reset switch | S9 |
Turbo switch | JP16 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | I/O bus mode select EISA | JP0 | Open |
I/O bus mode select ISA | JP0 | Closed | |
» | Monitor type select color | JP4 | Closed |
Monitor type select monochrome | JP4 | Open | |
» | Factory configured - do not alter | JP6 | Open |
CPU TYPE CONFIGURATION | |||
Jumper | 80486SX | 80487SX | 80486DX/DX2 |
JP7 | pins 2 & 3 closed | pins 1 & 2 and 3 & 4 closed | pins 1 & 2 and 3 & 4 closed |
JP9 | Open | pins 1 & 2 closed | pins 2 & 3 closed |
CPU SPEED CONFIGURATION | |||||
Speed | iOSC | JP1 | JP2 | JP3 | JP8 |
20MHz | 40MHz | Open | Closed | pins 2 & 3 | pins 2 & 3 |
25MHz | 50MHz | Open | Open | pins 1 & 2 | pins 2 & 3 |
33MHz | 66MHz | Closed | Open | pins 1 & 2 | pins 2 & 3 |
40MHz | 80MHz | Open | Closed | pins 1 & 2 | pins 2 & 3 |
50i MHz | 50MHz | Open | Open | pins 1 & 2 | pins 2 & 3 |
50MHz | 50MHz | Closed | Closed | pins 1 & 2 | pins 1 & 2 |
66i MHz | 66MHz | Closed | Open | pins 1 & 2 | pins 2 & 3 |
DRAM CONFIGURATION | ||
Size | Bank 0 | Bank 1 |
4MB | (4) 1M x 9 | NONE |
8MB | (4) 1M x 9 | (4) 1M x 9 |
16MB | (4) 4M x 9 | NONE |
20MB | (4) 1M x 9 | (4) 4M x 9 |
32MB | (4) 4M x 9 | (4) 4M x 9 |
64MB | (4) 16M x 9 | NONE |
128MB | (4) 16M x 9 | (4) 16M x 9 |
SRAM CONFIGURATION | ||||||
Size | Bank 0 | Bank 1 | U49 | U50 | U51 | U64 |
64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 64K x 1 | (1) 8K x 8 | NONE | (1) 16K x 1 |
128KB | (4) 32K x 8 | NONE | (1) 64K x 1 | (1) 8K x 8 | NONE | (1) 16K x 1 |
256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 64K x 1 | (1) 8K x 8 | (1) 8K x 8 | (1) 16K x 1 |
512KB | (4) 128K x 8 | NONE | (1) 64K x 1 | (1) 32K x 8 | NONE | (1) 64K x 1 |
SRAM JUMPER CONFIGURATION | ||||
Jumper | 64KB | 128KB | 256KB | 512KB |
JP5 | pins 2 & 3 closed | pins 1 & 2 closed | pins 2 & 3 closed | pins 1 & 2 closed |
JP10 | Open | Open | Open | Closed |
JP11 | Open | Open | Closed | Closed |
JP12 | Open | Closed | Closed | Closed |
JP13 | Open | Open | Closed | Closed |
JP14 | Open | Closed | Closed | Closed |
JP15 | Open | Open | Open | Closed |