MICRONICS COMPUTERS, INC.
ZIF SOCKET SYSTEM BOARD
|
Processor |
80486SX/80486DX/80486DX2/Pentium Overdrive |
|
Processor Speed |
25/33/50(internal)66/(internal)MHz |
|
Chip Set |
Intel |
|
Max. Onboard DRAM |
64MB |
|
Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit VESA local bus slots (2), floppy drive interface, IDE interface, parallel port, serial ports (2) |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Floppy drive interface |
CN1 |
Speaker |
J33 |
|
IDE interface |
CN2 |
Power LED & keylock |
J34 |
|
External battery |
J8 |
IDE interface LED |
W11 |
|
External keyboard connector |
J10 |
Reset switch |
W12 |
|
Serial port 1 |
J12 |
Turbo LED |
W13 |
|
Parallel port |
J15 |
Turbo switch |
W14 |
|
Serial port 2 |
J16 |
32-bit VESA Local bus slots |
SL1 & SL2 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper/Switch |
Position | |
|
» |
Factory configured - do not alter |
SW1/2 |
On |
|
» |
Factory configured - do not alter |
SW1/3 |
Off |
|
» |
Factory configured - do not alter |
SW1/4 |
Off |
|
» |
Clock type select Motorola 126818 |
W1 |
Open |
|
Clock type select Dallas |
W1 |
Closed | |
|
» |
Parallel port unidirectional (printer) |
W5 |
pins 1 & 2 closed |
|
Parallel port bidirectional |
W5 |
pins 2 & 3 closed | |
|
» |
Monitor type select color |
W6 |
Closed |
|
Monitor type select monochrome |
W6 |
Open | |
|
» |
Factory configured - do not alter |
W7 |
Open |
|
» |
CMOS memory normal operation |
W8 |
pins 2 & 3 closed |
|
CMOS memory clear |
W8 |
pins 1 & 2 closed | |
|
» |
Factory configured - do not alter |
W20 |
Closed |
|
» |
Factory configured - do not alter |
W28 |
Closed |
|
» |
Battery normal operation (Dallas) |
W31 |
Open |
|
Battery memory clear (Dallas) |
W31 |
Closed | |
|
» |
Local bus parity enabled |
W40 |
Closed |
|
Local bus disabled |
W40 |
Open | |
|
» |
Factory configured - do not alter |
W61 |
Open |
|
» |
Factory configured - do not alter |
W62 |
Open |
|
» |
CPU type select 80486DX/DX2/Pentium Overdrive |
W70 |
pins 2 & 3 closed |
|
CPU type select 80486SX |
W70 |
pins 1 & 2 closed | |
|
» |
CPU type select PQFP installed with PGA Pentium Overdrive |
W71 |
pins 1 & 2 closed |
|
CPU type select PQFP installed with PGA 80486DX/DX2 |
W71 |
pins 2 & 3 closed | |
|
Note: The location of jumpers W20, W28, W61 & W62 are unidentified. | |||
|
DRAM CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
1MB |
(1) 256K x 36 |
NONE |
NONE |
NONE |
|
2MB |
(1) 256K x 36 |
(1) 256K x 36 |
NONE |
NONE |
|
3MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
NONE |
|
4MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
|
4MB |
(1) 1M x 36 |
NONE |
NONE |
NONE |
|
5MB |
(1) 256K x 36 |
(1) 1M x 36 |
NONE |
NONE |
|
6MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 1M x 36 |
NONE |
|
7MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 1M x 36 |
|
8MB |
(1) 1M x 36 |
(1) 1M x 36 |
NONE |
NONE |
|
9MB |
(1) 256K x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
NONE |
|
10MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
|
12MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
NONE |
|
13MB |
(1) 256K x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
|
16MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
|
16MB |
(1) 4M x 36 |
NONE |
NONE |
NONE |
|
20MB |
(1) 1M x 36 |
(1) 4M x 36 |
NONE |
NONE |
|
DRAM CONFIGURATION (CON’T) | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
24MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 4M x 36 |
NONE |
|
28MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 4M x 36 |
|
32MB |
(1) 4M x 36 |
(1) 4M x 36 |
NONE |
NONE |
|
36MB |
(1) 1M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
NONE |
|
40MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
48MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
NONE |
|
52MB |
(1) 1M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
64MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
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 |
W64 |
W65 |
W66 |
W67 |
W68 |
|
64KB |
1 & 2 |
1 & 2 |
2 & 3 |
2 & 3 |
1 & 2 |
|
128KB |
2 & 3 |
1 & 2 |
1 & 2 |
1 & 2 |
2 & 3 |
|
256KB |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
|
Note: Pins designated should be in the closed position. | |||||
|
CPU SPEED CONFIGURATION | |
|
Speed |
SW1/1 |
|
25MHz |
On |
|
33MHz |
Off |
|
50iMHz |
On |
|
66iMHz |
Off |