UNIDENTIFIED
MB1433FA
Processor | 80486SX/80487SX/80486DX/80486DX2 |
Processor Speed | 25/33/40/50(internal)/50/66(internal)MHz |
Chip Set | Unidentified |
Max. Onboard DRAM | 32MB |
Cache | 32/64/128/256KB |
BIOS | AMI |
Dimensions | 254mm x 220mm |
I/O Options | None |
NPU Options | 4167 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Power LED & keylock | J1 | Reset switch | J4 |
Speaker | J2 | Turbo switch | J5 |
Turbo LED | J3 | External battery | JP17 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | Keyboard BIOS pin size select 23 | JP3 | pins 1 & 3 closed |
Keyboard BIOS pin size select 30 | JP3 | pins 2 & 4 closed | |
» | Monitor type select monochrome | JP4 | Open |
Monitor type select color | JP4 | Closed | |
» | Chip type select 146818 | JP7 | Open |
Chip type select Dallas | JP7 | Closed | |
» | CMOS memory normal operation | JP11 | pins 2 & 4 closed |
CMOS memory clear | JP11 | pins 1 & 3 closed | |
» | Fuse enabled | JPE | Open |
Fuse disabled | JPE | 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 |
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 |
32KB | (4) 8K x 8 | NONE | (1) 8K x 8 |
64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 |
128KB | (4) 32K x 8 | NONE | (1) 8K x 8 |
256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
CACHE JUMPER CONFIGURATION | |||||
Size | jp2 | jp13 | jp16 | jp18 | jp20 |
32KB | 1 & 8, 2 & 7, 3 & 6, 4 & 5 | 1 & 4 | 1 & 4 | Open | Open |
64KB | 1 & 8, 2 & 7, 4 & 5 | 2 & 3 | 1 & 4 | 1 & 4 | Open |
128KB | 1 & 8, 2 & 7, 3 & 6 | 1 & 4 | 1 & 4 | 1 & 4, 2 & 3 | 1 & 8, 2 & 7 |
256KB | 1 & 8, 2 & 7 | 2 & 3 | 1 & 4, 2 & 3 | 1 & 4, 2 & 3 | 3 & 6, 4 & 5 |
Note: Pins designated should be in the closed position. |
CPU TYPE CONFIGURATION | |
Type | JP10 |
80486SX | pins 3 & 10 closed |
80487SX | pins 1 & 12, 2 & 11, 5 & 8 closed |
80486DX | pins 1 & 12, 2 & 11, 3 & 10 closed |
80486DX2 | pins 1 & 12, 2 & 11, 3 & 10 closed |