UNIDENTIFIED
M-421
Processor | 80486SX/80486DX/80486DX2 |
Processor Speed | 25/33/50(internal)/66(internal)MHz |
Chip Set | PC Chips |
Video Chip Set | None |
Maximum Onboard Memory | 32MB |
Maximum Video Memory | None |
Cache | None |
BIOS | AMI |
Dimensions | 220mm x 220mm |
I/O Options | None |
NPU Options | 4167 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Speaker | J1 | Turbo switch | J4 |
Power LED & keylock | J2 | Reset switch | J5 |
Turbo LED | J3 | External battery | JP4 |
USER CONFIGURABLE SETTINGS | |||
Function | Label | Position | |
Battery type select internal | JP4 | Pins 2 & 3 closed | |
Battery type select external | JP4 | Open | |
CMOS memory clear | JP4 | Pins 3 & 4 closed | |
» | Monitor type select monochrome | JP5 | Open |
Monitor type select color | JP5 | 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 |
20MB | (4) 1M x 9 | (4) 4M x 9 |
32MB | (4) 4M x 9 | (4) 4M x 9 |
CPU TYPE SELECTION | ||
Type | JP1 | JP2 |
80486SX | Pins 1 & 2 closed | Open |
80486DX | Pins 2 & 3 closed | Pins 1 & 2 closed |
80486DX2 | Pins 2 & 3 closed | Pins 1 & 2 closed |
NPU SELECTION |
Note: To install a 4167 NPU, install the Math Coprocessor Daughterboard over the CPU socket. |