ABC COMPUTER COMPANY, LTD.
A4872
Processor | 80486DX |
Processor Speed | 33MHz |
Chip Set | UMC |
Max. Onboard DRAM | 32MB |
Cache | 256KB |
BIOS | AMI |
Dimensions | 330mm x 218mm |
I/O Options | None |
NPU Options | 4167 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | J1 | Reset switch | J9 |
Turbo LED | J7 | Speaker | J10 |
Turbo switch | J8 | Power LED & keylock | J11 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | Monitor type select color | J4 | Closed |
Monitor type select monochrome | J4 | Open | |
» | Factory configured - do not alter | J5 | Open |
» | CMOS memory normal operation | J6 | pins 1 & 2 closed |
CMOS memory clear | J6 | pins 2 & 3 closed | |
» | Factory configured - do not alter | W1 | pins 1 & 2 closed |
» | Factory configured - do not alter | W2 | pins 1 & 2 closed |
» | Factory configured - do not alter | W3 | pins 1 & 2 closed |
» | Factory configured - do not alter | W4 | pins 1 & 2 closed |
» | Factory configured - do not alter | W5 | pins 2 & 3 closed |
» | Factory configured - do not alter | W10 | Open |
» | Factory configured - do not alter | W11 | Open |
» | Factory configured - do not alter | W15 | Open |
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 |
5MB | (4) 256K x 9 | (4) 1 M x 9 |
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 |
CACHE CONFIGURATION | |||
Size | Bank 0 | Bank 1 | TAG |
64KB | (4) 8K x 8 | (4) 8K x 8 | (4) 16K x 4 |
128KB | (4) 32K x 8 | NONE | (4) 16K x 4 |
256KB | (4) 32K x 8 | (4) 32K x 8 | (4) 16K x 4 |
CACHE JUMPER CONFIGURATION | ||||
Size | W6 | W7 | W8 | W9 |
64KB | pins 1 & 2 closed | pins 1 & 2 closed | Open | pins 1 & 2 closed |
128KB | pins 1 & 2 closed | pins 2 & 3 closed | pins 1 & 2 closed | pins 2 & 3 closed |
256KB | pins 2 & 3 closed | pins 2 & 3 closed | pins 2 & 3 closed | pins 1 & 2 closed |
CPU TYPE CONFIGURATION | |||
Type | W12 | W13 | W14 |
80486SX | Open | pins 2 & 3 closed | Open |
80487SX | Closed | pins 1 & 2 closed | pins 2 & 3 closed |
80486DX | Closed | pins 1 & 2 closed | pins 1 & 2 closed |