UNIDENTIFIED
J-404
Processor |
80486SX/80486DX/80486DX2 |
Processor Speed |
25/33/40/50(internal)/50/66(internal)MHz |
Chip Set |
Unidentified |
Max. Onboard DRAM |
64MB |
Cache |
64/128/256KB |
BIOS |
AMI/Award |
Dimensions |
250mm x 220mm |
I/O Options |
None |
NPU Options |
None |
CONNECTIONS | |||
Purpose |
Location |
Purpose |
Location |
External battery |
J1 |
Turbo switch |
JP13 |
Power LED & keylock |
J21 |
Speaker |
JP16 |
Turbo LED |
JP12 |
Reset switch |
S1 |
USER CONFIGURABLE SETTINGS | |||
Function |
Jumper |
Position | |
» |
CMOS memory normal operation |
JP1 |
pins 2 & 3 closed |
CMOS memory clear |
JP1 |
pins 1 & 2 closed | |
» |
Monitor type select color |
JP2 |
Closed |
Monitor type select monochrome |
JP2 |
Open | |
» |
Factory configured - do not alter |
JP24 |
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) 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 |
U3P |
U40 |
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
NONE |
(1) 8K x 8 |
128KB |
(4) 32K x 8 |
NONE |
NONE |
(1) 8K x 8 |
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 8K x 8 |
(1) 8K x 8 |
256KB |
(4) 64K x 8 |
NONE |
NONE |
(1) 32K x 8 |
CACHE JUMPER CONFIGURATION | ||||
Size |
JP3 |
JP5 |
JP8 |
JP9 |
64KB |
pins 2 & 3 closed |
pins 2 & 3 closed |
Open |
Open |
128KB |
pins 1 & 2 closed |
pins 1 & 2 closed |
Closed |
Open |
256KB |
pins 2 & 3 closed |
pins 2 & 3 closed |
Closed |
Closed |
CPU TYPE CONFIGURATION | |||
Type |
JP6 |
JP7 |
JP11 |
80486SX |
pins 2 & 3 closed |
pins 2 & 3 closed |
Open |
80486DX |
pins 1 & 2 closed |
pins 1 & 2 closed |
Closed |
80486DX2 |
pins 1 & 2 closed |
pins 1 & 2 closed |
Closed |
CPU SPEED CONFIGURATION | |||
Speed |
JP18 |
JP19 |
JP20 |
25MHz |
Closed |
Open |
Closed |
33MHz |
Closed |
Closed |
Open |
40MHz |
Open |
Open |
Closed |
50iMHz |
Closed |
Open |
Closed |
50MHz |
Open |
Closed |
Open |
66iMHz |
Closed |
Closed |
Open |