FRONTIER INDUSTRIAL, INC.
VLSI 82C486
|
Processor |
80486SX/80486DX |
|
Processor Speed |
16/20/25/33MHz |
|
Chip Set |
VLSI |
|
Max. Onboard DRAM |
32MB |
|
Cache |
None |
|
BIOS |
Award |
|
Dimensions |
220mm x 220mm |
|
I/O Options |
None |
|
NPU Options |
4167 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J3 |
Turbo LED |
J6 |
|
Speaker |
J4 |
Power LED & keylock |
J7 |
|
Turbo switch |
J5 |
Reset switch |
JP1 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
CMOS memory normal operation |
JP2 |
pins 3 & 4 closed | |
|
CMOS memory clear |
JP2 |
pins 1 & 2 closed | |
|
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 |
|
CPU TYPE CONFIGURATION | ||||
|
Type |
OSC1 (MHz) |
JP3 |
JP4 |
JP5 |
|
80486SX-16 |
33MHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
Open |
|
80486SX-20 |
40MHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
Open |
|
80486SX-25 |
50MHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
Open |
|
80486DX-25 |
50MHz |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
80486DX-33 |
66MHz |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |