MODULAR CIRCUIT TECHNOLOGY
JDR C486-33/50/66
|
Processor |
80486SX/80486DX/80486DX2 |
|
Processor Speed |
33/66(internal)MHz |
|
Chip Set |
UMC |
|
Max. Onboard DRAM |
32MB |
|
Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
254mm x 218mm |
|
I/O Options |
None |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Speaker |
J1 |
Turbo LED |
J4 |
|
Reset connector |
J2 |
External battery |
J8 |
|
Power LED & keylock |
J3 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
|
CMOS memory normal operation |
J7 |
Open |
|
CMOS memory clear |
J7 |
pins 2 & 3 closed | |
|
|
Factory configured - do not alter |
JP4 |
Open |
|
|
Factory configured - do not alter |
JP5 |
Open |
|
|
Factory configured - do not alter |
JP6 |
Closed |
|
|
Factory configured - do not alter |
JP7 |
Open |
|
|
Monitor type select color |
JP9 |
Closed |
|
Monitor type select monochrome |
JP9 |
Open | |
|
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 |
|
CACHE CONFIGURATION | |||
|
Size |
Bank 0 |
Bank 1 |
TAG |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(1) 8K x 8 |
|
128KB |
(4) 32K x 8 |
NONE |
(1) 8K x 8 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION | ||||
|
Size |
W1 |
W2 |
W3 |
W4 |
|
64KB |
pins 2 & 3 closed |
Open |
Open |
pins 1 & 2 closed |
|
128KB |
pins 1 & 2 closed |
Open |
Closed |
pins 2 & 3 closed |
|
256KB |
pins 2 & 3 closed |
Closed |
Closed |
pins 2 & 3 closed |
|
CPU TYPE CONFIGURATION | |||
|
Type |
JP1 |
JP2 |
JP3 |
|
80486SX-33 |
Open |
pins 2 & 3 closed |
Open |
|
80486DX-33 |
pins 1 & 2 closed |
pins 1 & 2 closed |
Closed |
|
80486DX2-66 |
pins 1 & 2 closed |
pins 1 & 2 closed |
Closed |
|
CPU TYPE CONFIGURATION | ||
|
Type |
JP10 |
JP11 |
|
80486DX |
Closed |
Open |
|
80486DX2 |
Closed |
Closed |