JC INFORMATION SYSTEMS CORPORATION
MODEL 2020
|
Processor |
80386DX |
|
Processor Speed |
25/33MHz |
|
Chip Set |
C & T PEAK/DM |
|
Max. Onboard DRAM |
32MB |
|
Cache |
64KB |
|
BIOS |
C & T/Phoenix |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit external memory card slot |
|
NPU Options |
80387 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J4 |
Speaker |
SPK |
|
Power LED & keylock |
KEYL |
Self test |
TEST |
|
Reset switch |
RSW |
Turbo LED |
TLED |
|
32-bit external memory card |
S1 |
Turbo switch |
TSW |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
Factory configured - do not alter |
W2 |
open | |
|
Factory configured - do not alter |
W3 |
pins 1 & 2 closed | |
|
Factory configured - do not alter |
W6 |
closed | |
|
Factory configured - do not alter |
W9 |
pins 2 & 3 closed | |
|
CMOS memory normal operation |
W10 |
pins 2 & 3 closed | |
|
CMOS memory clear |
W10 |
pins 1 & 2 closed | |
|
Monitor type select color |
W11 |
closed | |
|
Monitor type select monochrome |
W11 |
open | |
|
Note:The locations of W2, W3, W6, and W9 are unknown. | |||
|
DRAM CONFIGURATION | |||
|
Size |
Bank 0 |
Bank 1 |
W4 |
|
1MB |
(4) 256K x 9 |
NONE |
pins 1 & 2 closed |
|
2MB |
(4) 256K x 9 |
(4) 256K x 9 |
pins 1 & 2 closed |
|
4MB |
(4) 1M x 9 |
NONE |
pins 1 & 2 closed |
|
5MB |
(4) 1M x 9 |
(4) 256K x 9 |
pins 2 & 3 closed |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
pins 1 & 2 closed |
|
16MB |
(4) 4M x 9 |
NONE |
pins 1 & 2 closed |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
pins 1 & 2 closed |
|
CACHE CONFIGURATION | |||
|
Size |
Cache CACHE |
Location |
TAG |
|
64KB |
(8) 8K x 8 |
CACHE |
(2) 16K x 1 |