FREE COMPUTER TECHNOLOGY, INC.
80486L-ISA
|
Processor |
80486SX/80487SX/80486DX/ODP486SX/80486DX2 |
|
Processor Speed |
20/25/33/50(internal)/50/66(internal)MHz |
|
Chip Set |
UNI |
|
Max. Onboard DRAM |
128MB |
|
SRAM Cache |
64/128/256KB |
|
BIOS |
AMI/Award |
|
Dimensions |
254mm x 218mm |
|
I/O Options |
32-bit local bus card slot |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
32-bit local bus card |
CN1 |
Speaker |
H4 |
|
Turbo switch |
H1 |
Power LED & keylock |
H5 |
|
Turbo LED |
H2 |
External battery |
JP1 |
|
Reset switch |
H3 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
Monitor type select color |
JP12 |
open | |
|
Monitor type select monochrome |
JP12 |
closed | |
|
CPU TYPE CONFIGURATION | |||||
|
U26 |
U51 |
J4 |
J5 |
J7 |
J8 |
|
80486DX2 |
80486DX |
pins 1 & 2 and 3 & 4 |
pins 1 & 2 |
closed |
open |
|
80486DX |
80486DX |
pins 1 & 2 and 3 & 4 |
pins 1 & 2 |
closed |
open |
|
80487SX |
80486DX |
pins 1 & 2 and 3 & 4 |
pins 2 & 3 |
closed |
open |
|
80486SX |
80486DX |
pins 2 & 3 |
open |
closed |
open |
|
NONE |
80486DX |
pins 1 & 2 and 3 & 4 |
pins 1 & 2 |
open |
closed |
|
Note:Pins designated should be in the closed position. U51 is a surface mounted CPU (PQFP) that may or may not have been installed at the factory. U26 is a socketed CPU (PGA) that has been installed at the factory, or can be installed by the user. | |||||
|
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 |
|
64MB |
(4) 16M x 9 |
NONE |
|
80MB |
(4) 16M x 9 |
(4) 4M x 9 |
|
128MB |
(4) 16M x 9 |
(4) 16M x 9 |
|
SRAM JUMPER CONFIGURATION | ||
|
Size |
JP2 |
JP3 |
|
64KB |
open |
open |
|
128KB |
pins 2 & 3 closed |
closed |
|
256KB |
pins 1 & 2 closed |
closed |
|
SRAM CONFIGURATION | |||
|
Size |
Cache SRAM |
Location |
TAG |
|
64KB |
(8) 8K x 8 |
Banks 0 & 1 |
(1) 8K x 8 |
|
128KB |
(4) 32K x 8 |
Bank 0 |
(1) 8K x 8 |
|
256KB |
(8) 32K x 8 |
Banks 0 & 1 |
(1) 32K x 8 |