UNIDENTIFIED
80486
Processor | 80486SX/80487SX/ODP486SX/80486DX/80486DX2 |
Processor Speed | 20/25/33/40/50(internal)/66(internal)MHz |
Chip Set | OPTI |
Max. Onboard DRAM | 32MB |
Cache | None |
BIOS | AMI |
Dimensions | 254mm x 218mm |
I/O Options | None |
NPU Options | None |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Power LED & keylock | J17 | External battery | J20 |
Speaker | J18 | Turbo switch | J21 |
Reset switch | J19 | Turbo LED | J22 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | CPU type select PGA or PQFP installed | J23 | Open |
CPU type select PQFP disabled & PGA enabled | J23 | Closed | |
» | Monitor type select monochrome | JP3 | Open |
Monitor type select color/EGA/VGA | JP3 | Closed | |
» | CMOS memory normal operation | JP5 | pins 1 & 2 closed |
CMOS memory clear | JP5 | 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 |
5MB | (4) 256K x 9 | (4) 1M x 9 |
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 | JP101 | JP102 | JP103 | JP104 |
80486SX | Open | pins 2 & 3 closed | Open | pins 2 & 3 closed |
80487SX | Closed | pins 1 & 2 closed | pins 2 & 3 closed | pins 2 & 3 closed |
ODP486SX | Closed | pins 1 & 2 closed | pins 2 & 3 closed | pins 2 & 3 closed |
80486DX/DX2 | Closed | pins 1 & 2 closed | pins 1 & 2 closed | pins 2 & 3 closed |
CPU SPEED CONFIGURATION | |||
Speed | J24 | J25 | J26 |
20MHz | Open | Closed | Closed |
25MHz | Closed | Open | Closed |
33MHz | Closed | Closed | Open |
50iMHz | Closed | Open | Closed |
66iMHz | Closed | Closed | Open |