UNIDENTIFIED
486LC25/33
|
Processor |
80486DX |
|
Processor Speed |
25/33MHz |
|
Chip Set |
Intel |
|
Max. Onboard DRAM |
16MB |
|
Cache |
128/256KB |
|
BIOS |
AMI/Award/Phoenix |
|
Dimensions |
335mm x 277mm |
|
I/O Options |
None |
|
NPU Options |
4167 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Power LED & keylock |
J1 |
Reset switch |
J5 |
|
Turbo switch |
J3 |
Turbo LED |
J6 |
|
Speaker |
J4 |
External battery |
JB2 |
|
Note:Pin one locations are unidentified. | |||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper/Switch |
Position | |
| » |
DRAM speed select 80ns or 100ns (for 25Mhz CPU) |
JP4 |
pins 2 & 3 closed |
|
DRAM speed select 60ns or 80ns (for 33MHz CPU) |
JP4 |
pins 1 & 2 closed | |
| » |
Factory configured - do not alter |
SW1/1 |
N/A |
| » |
Operating system select other than SCO UNIX Open Desktop |
SW1/2 |
Off |
|
Operating system select SCO UNIX Open Desktop |
SW1/2 |
On | |
| » |
Monitor type select color |
SW1/5 |
On |
|
Monitor type select monochrome |
SW1/5 |
Off | |
| » |
DRAM 32-bit access enabled |
SW1/6 |
On |
|
DRAM 32-bit access disabled |
SW1/6 |
Off | |
|
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 |
|
3MB |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
NONE |
|
4MB |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
|
4MB |
(4) 1M x 9 |
NONE |
NONE |
NONE |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
NONE |
NONE |
|
12MB |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
NONE |
|
16MB |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
|
DRAM JUMPER CONFIGURATION | |||
|
Size |
JP1 |
JP2 |
JP3 |
|
1MB |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
2MB |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
3MB |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
4MB 1 |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
4MB 2 |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
8MB |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
12MB |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
16MB |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
Note 1 :Use this setting when (4) 256K x 9 SIMMs are populating all four banks.Note 2 :Use this setting when (4) 1M x 9 SIMMs are populating Bank 0. | |||
|
CACHE CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
128KB |
(4) 32K x 8 |
NONE |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
|
CACHE SWITCH CONFIGURATION | |||
|
Function |
Switch SW1 |
Position | |
| » |
SRAM cache enabled |
SW1/3 |
On |
|
SRAM cache disabled |
SW1/3 |
Off | |
| » |
DRAM installed between 12MB and 16MB is cached |
SW1/4 |
On |
|
DRAM installed between 12MB and 16MB is not cached |
SW1/4 |
Off | |
|
BIOS CONFIGURATION | ||
|
Size |
JP5 |
SW1/7 |
|
27256 |
pins 1 & 2 closed |
Off |
|
27512 |
pins 2 & 3 closed |
On |