JC INFORMATION SYSTEMS CORPORATION
486 SX/DX MODEL 270
|
Processor |
80486SX/80487SX/80486DX/80486DX2 |
|
Processor Speed |
25/33/50(internal)/66(internal)MHz |
|
Chip Set |
C & T |
|
Max. Onboard DRAM |
32MB |
|
Cache |
64/256KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit memory expansion slot |
|
NPU Options |
4167 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J11 |
32 bit memory expansion slot |
SL1 |
|
Power LED & keylock |
J20 |
Reset switch |
SW1 |
|
Speaker |
J21 |
Turbo switch |
SW2 |
|
Turbo LED |
JP11 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
|
Enable onboard battery |
JP1 |
pins 2 & 3 closed |
|
Enable external battery |
JP1 |
Open | |
|
|
Monitor type select color |
JP2 |
Closed |
|
Monitor type select monochrome |
JP2 |
Open | |
|
|
Factory configured do not alter |
JP3 |
N/A |
|
|
Factory configured do not alter |
JP4 |
N/A |
|
|
Factory configured do not alter |
JP5 |
N/A |
|
|
Factory configured do not alter |
JP7 |
N/A |
|
|
Factory configured do not alter |
JP9 |
N/A |
|
|
Factory configured do not alter |
JP10 |
N/A |
|
|
Turbo switch not available |
JP11 |
Closed |
|
|
Factory configured do not alter |
JP12 |
N/A |
|
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) 1M x 9 |
(4) 256K x 9 |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
|
20MB |
(4) 4M x 9 |
(4) 1M x 9 |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
CACHE CONFIGURATION | ||
|
Size |
Bank 0 |
TAG |
|
64KB |
(8) 8K x 8 |
(1) 8K x 8 |
|
256KB |
(8) 32K x 8 |
(1) 32K x 8 |