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 |