ABIT COMPUTER CORPORATION
AR4
Processor | 80486SX/80487SX/80486DX/80486DX2 |
Processor Speed | 40/50(internal)/60/66(internal)MHz |
Chip Set | ALI |
Max. Onboard DRAM | 32MB |
Cache | None |
BIOS | Award |
Dimensions | 330mm x 218mm |
I/O Options | None |
NPU Options | None |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | J4 | Turbo switch/LED | J21 |
Reset switch | J19 | Keylock | J22 |
Speaker | J20 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | Monitor type select color | JP1 | pins 2 & 3 closed |
Monitor type select monochrome | JP1 | pins 1 & 2 closed | |
Factory configured - do not alter | JP2 | on | |
CPU set at 80486SX (PQFP) | JP7 | pins 1 & 2 closed | |
CPU set at 80486SX (PGA) | JP7 | pins 2 & 3 closed |
DRAM CONFIGURATION | ||
Size | Bank 0 | Bank 1 |
1MB | (4) 256K x 9 | NONE |
2MB | (4) 256K x 9 | (4) 256K x 9 |
4MB | (4) 1M x 9 | NONE |
8MB | (4) 1M x 9 | (4) 1M x 9 |
16MB | (4) 4M x 9 | NONE |
32MB | (4) 4M x 9 | (4) 4M x 9 |
CPU TYPE CONFIGURATION | ||
CPU Type | JP4 | JP5 |
80486SX | Open | pin 1 & 2 closed |
80487SX | pins 1 & 2 closed | pins 2 & 3 closed |
80486DX | pins 2 & 3 closed | pins 2 & 3 closed |
80486DX2 | pins 2 & 3 closed | pins 2 & 3 closed |
AT BUS CLOCK CONFIGURATION | ||
Speed | JP3 | JP6 |
40MHz | pins 2 & 3 closed | pins 1 & 2 closed |
50MHz | pins 1 & 2 closed | pins 2 & 3 closed |
66MHz | pins 1 & 2 closed | pins 1 & 2 closed |