ABIT COMPUTER CORPORATION
AS420N/AS425N/AS433N/AS455N
Processor | 80486SX/80486DX |
Processor Speed | 20/25/33/40MHz |
Chip Set | SIS |
Max. Onboard DRAM | 32MB |
Cache | None |
BIOS | AMI |
Dimensions | 355mm x 304mm |
I/O Options | None |
NPU Options | 4167 |

CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Turbo LED | D6 | Reset | JP20 |
External battery | JP15 | Speaker | JP21 |
Turbo switch | JP19 | Power LED & keylock | JP22 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
| » | Factory configured - do not alter | JP2 | Open |
| » | Monitor type select monochrome | JP4 | Open |
Monitor type select color | JP4 | Closed | |
| » | CMOS memory normal operation | JP5 | pins 1 & 2 closed |
| CMOS memory clear | JP5 | pins 2 & 3 closed | |
| » | Factory configured - do not alter | JP6 | pins 1 & 2 closed |
| » | Factory configured - do not alter | JP8 | pins 1 & 2 closed |
| » | Factory configured - do not alter | JP14 | pins 1 & 2 closed |
| » | Factory configured - do not alter | JP17 | pins 1 & 2 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 | ||
Type | JP26 | JPX5 |
80486SX | Closed | Open |
80486DX | Open | Closed |