BIOSTAR MICROTECH INTERNATIONAL CORPORATION
MB1420PD/1420PL/1425PD/1425PL/1433PD/
1433PL/1450PD/1450PL/1450E
|
Processor |
80486SX/80486DX |
|
Processor Speed |
20/25/33/50MHz |
|
Chip Set |
OPTI |
|
Max. Onboard DRAM |
40MB |
|
Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
None |
|
NPU Options |
4167 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J11 |
Turbo LED |
JP11 |
|
Power LED & keylock |
J20 |
Reset switch |
SW1 |
|
Speaker |
J21 |
Turbo switch |
SW2 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
| » |
CMOS memory normal operation |
JP1 |
pins 2 & 3 closed |
|
CMOS memory clear |
JP1 |
pins 1 & 2 closed | |
| » |
Monitor type select color |
JP2 |
Closed |
|
Monitor type select monochrome |
JP2 |
Open | |
|
DRAM CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
1MB |
(4) 256K x 9 |
NONE |
NONE |
NONE |
|
2MB |
(4) 256K x 9 |
(4) 256K x 9 |
NONE |
NONE |
|
4MB |
(4) 1M x 9 |
NONE |
NONE |
NONE |
|
5MB |
(4) 256K x 9 |
(4) 1M x 9 |
NONE |
NONE |
|
6MB |
(4) 256K x 9 |
(1) 256K x 36 |
(4) 1M x 9 |
NONE |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
NONE |
NONE |
|
9MB |
(4) 256K x 9 |
(4) 1M x 9 |
(1) 1M x 36 |
NONE |
|
10MB |
(4) 256K x 9 |
(4) 256K x 9 |
(1) 1M x 36 |
(1) 1M x 36 |
|
12MB |
(4) 1M x 9 |
(4) 1M x 9 |
(1) 1M x 36 |
NONE |
|
13MB |
(4) 256K x 9 |
(4) 1M x 9 |
(1) 1M x 36 |
(1) 1M x 36 |
|
16MB |
(4) 1M x 9 |
(4) 1M x 9 |
(1) 1M x 36 |
(1) 1M x 36 |
|
16MB |
(4) 4M x 9 |
NONE |
NONE |
NONE |
|
20MB |
(4) 1M x 9 |
(4) 4M x 9 |
NONE |
NONE |
|
20MB |
(4) 4M x 9 |
(4) 1M x 9 |
NONE |
NONE |
|
24MB |
(4) 1M x 9 |
(4) 4M x 9 |
(1) 1M x 36 |
NONE |
|
24MB |
(4) 1M x 9 |
(4) 4M x 9 |
(1) 256K x 36 |
NONE |
|
24MB |
(4) 4M x 9 |
(4) 1M x 9 |
(1) 1M x 36 |
NONE |
|
28MB |
(4) 4M x 9 |
(4) 1M x 9 |
(1) 1M x 36 |
(1) 1M x 36 |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
NONE |
NONE |
|
36MB |
(4) 4M x 9 |
(4) 4M x 9 |
(1) 1M x 36 |
NONE |
|
40MB |
(4) 4M x 9 |
(4) 4M x 9 |
(1) 1M x 36 |
(1) 1M x 36 |
|
Note:36-bit SIMM banks 2 & 3 are not installed on some board versions. | ||||
|
CACHE CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
TAG (U34) |
Dirty Bit (U46) |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(1) 8K x 8 |
(1) 64K x 1 |
|
128KB |
(4) 32K x 8 |
NONE |
(1) 8K x 8 |
(1) 64K x 1 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 32K x 8 |
(1) 64K x 1 |
|
CACHE JUMPER CONFIGURATION | |||||
|
Size |
JP8 |
JP9 |
JP10 |
JP12 |
JP13 |
|
64KB |
Open |
Open |
Open |
Open |
pins 2 & 3 closed |
|
128KB |
Open |
Open |
Closed |
Closed |
pins 1 & 2 closed |
|
256KB |
Open |
Closed |
Closed |
Closed |
pins 2 & 3 closed |
|
CPU TYPE CONFIGURATION | |||
|
Type |
JP3 |
JP4 |
JP5 |
|
80486SX |
Open |
Open |
pins 2 & 3 closed |
|
80486DX |
pins 2 & 3 closed |
Closed |
pins 1 & 2 closed |
|
CPU SPEED CONFIGURATION | |
|
Speed |
JP7 |
|
20MHz |
pins 2 & 3 closed |
|
25MHz |
pins 2 & 3 closed |
|
33MHz |
pins 2 & 3 closed |
|
50MHz |
pins 1 & 2 closed |