MICRONICS COMPUTERS, INC.
486/25
|
Processor |
80486DX |
|
Processor Speed |
25MHz |
|
Chip Set |
Micronics |
|
Max. Onboard DRAM |
16MB |
|
Cache |
64/128/256KB |
|
BIOS |
Phoenix |
|
Dimensions |
355mm x 304mm |
|
I/O Options |
None |
|
NPU Options |
4167 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J2 |
Reset switch |
W4 |
|
Speaker |
J22 |
Turbo LED |
W5 |
|
Power LED & keylock |
J23 |
Turbo switch |
W6 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper/Switch |
Position | |
|
» |
Internal cache enabled |
SW1/1 |
On |
|
Internal cache disabled |
SW1/1 |
Off | |
|
» |
On board BIOS enabled |
SW1/2 |
Off |
|
External BIOS enabled |
SW1/2 |
On | |
|
» |
Factory configured - do not alter |
SW1/3 |
On |
|
» |
External cache enabled |
SW1/4 |
On |
|
External cache disabled |
SW1/4 |
Off | |
|
» |
BIOS relocation disabled |
SW1/5 |
Off |
|
BIOS relocation enabled |
SW1/5 |
On | |
|
» |
Factory configured - do not alter |
SW1/6 |
Off |
|
» |
Monitor type select color, CGA, EGA, or VGA |
SW1/7 |
On |
|
Monitor type select monochrome |
SW1/7 |
Off | |
|
» |
Factory configured - do not alter |
SW1/8 |
Off |
|
» |
Factory configured - do not alter |
SW2/5 |
Off |
|
» |
D00000-EFFFFF cacheable |
SW2/6 |
Off |
|
D00000-EFFFFF non-cacheable |
SW2/6 |
On | |
|
» |
Factory configured - do not alter |
W1 |
N/A |
|
» |
Factory configured - do not alter |
W2 |
pins 2 & 3 closed |
|
» |
Factory configured - do not alter |
W3 |
N/A |
|
Note:The exact location of W2 is unknown. | |||
|
DRAM CONFIGURATION | ||||||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
SW1/1 |
SW1/2 |
SW1/3 |
SW1/4 |
|
1MB |
(4)256K x 9 |
NONE |
NONE |
NONE |
On |
On |
On |
On |
|
2MB |
(4)256K x 9 |
(4)256K x 9 |
NONE |
NONE |
Off |
On |
On |
On |
|
3MB |
(4)256K x 9 |
(4)256K x 9 |
(4)256K x 9 |
NONE |
On |
Off |
On |
On |
|
4MB |
(4)256K x 9 |
(4)256K x 9 |
(4)256K x 9 |
(4)256K x 9 |
Off |
Off |
On |
On |
|
4MB |
(4)1M x 9 |
NONE |
NONE |
NONE |
On |
On |
Off |
On |
|
5MB |
(4)256K x 9 |
(4)1M x 9 |
NONE |
NONE |
On |
On |
Off |
Off |
|
6MB |
(4)256K x 9 |
(4)256K x 9 |
(4)1M x 9 |
NONE |
On |
Off |
On |
Off |
|
7MB |
(4)256K x 9 |
(4)256K x 9 |
(4)256K x 9 |
(4)1M x 9 |
Off |
On |
On |
Off |
|
8MB |
(4)1M x 9 |
(4)1M x 9 |
NONE |
NONE |
Off |
On |
Off |
On |
|
9MB |
(4)256K x 9 |
(4)1M x 9 |
(4)1M x 9 |
NONE |
On |
Off |
Off |
Off |
|
10MB |
(4)256K x 9 |
(4)256K x 9 |
(4)1M x 9 |
(4) 1M x 9 |
Off |
Off |
On |
Off |
|
12MB |
(4)1M x 9 |
(4)1M x 9 |
(4)1M x 9 |
NONE |
On |
Off |
Off |
On |
|
13MB |
(4)256K x 9 |
(4)1M x 9 |
(4)1M x 9 |
(4)1M x 9 |
Off |
Off |
Off |
Off |
|
16MB |
(4)1M x 9 |
(4)1M x 9 |
(4)1M x 9 |
(4)1M x 9 |
Off |
Off |
Off |
On |
|
CACHE CONFIGURATION | |||
|
Size |
Bank 0 |
Bank 1 |
TAG |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(1) 32K x 8 |
|
128KB |
(4) 32K x 8 |
NONE |
(1) 32K x 8 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 32K x 8 |
|
Note:The exact location of the TAG chip is unknown. | |||
|
CACHE JUMPER CONFIGURATION | ||||
|
Size |
SW2/7 |
SW2/8 |
W8 |
W9 |
|
64KB |
Off |
Off |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
128KB |
On |
On |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
256KB |
Off |
On |
pins 2 & 3 closed |
pins 2 & 3 closed |