MICRONICS COMPUTERS, INC.
EISA-3 SYSTEM BOARD
|
Processor |
80486SX/80486DX/ODP486SX/80486DX2 |
|
Processor Speed |
25/33/50(internal)/50/66(internal)MHz |
|
Chip Set |
Micronics |
|
Max. Onboard DRAM |
64MB |
|
Cache |
64/128/256/512KB |
|
BIOS |
Phoenix |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
None |
|
NPU Options |
None |
|
CONNECTIONS |
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|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J3 |
Power LED & keylock |
J11 |
|
Turbo LED |
J5 |
Speaker |
J13 |
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Turbo switch |
J8 |
External keyboard connector |
J23 |
|
Reset switch |
J9 |
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USER CONFIGURABLE SETTINGS |
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Function |
Jumper |
Position |
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Monitor type select color |
J12 |
Closed |
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Monitor type select monochrome |
J12 |
Open |
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Factory configured - do not alter |
J25 |
Open |
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DRAM CONFIGURATION |
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Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
4MB |
(1) 1M x 36 |
NONE |
NONE |
NONE |
|
8MB |
(1) 1M x 36 |
(1) 1M x 36 |
NONE |
NONE |
|
12MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
NONE |
|
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 |
|
24MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 4M x 36 |
NONE |
|
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 |
|
64MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
CACHE CONFIGURATION |
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|
Size |
Bank 0 |
Bank 1 |
TAG/U101 |
TAG/U102 |
TAG/U103 |
TAG/U104 |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
NONE |
NONE |
(1) 64K x 1 |
(1) 32K x 8 |
|
128KB |
(4) 32K x 8 |
NONE |
NONE |
NONE |
(1) 64K x 1 |
(1) 32K x 8 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 16K x 4 |
(1) 16K x 4 |
(1) 64K x 1 |
NONE |
|
512KB |
(4) 128K x 8 |
NONE |
NONE |
NONE |
(1) 64K x 1 |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION |
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|
Size |
J15 |
J16 |
J17 |
J18 |
J19 |
J20 |
J21 |
J22 |
|
64KB |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
2 & 3 |
3 & 4 |
|
128KB |
2 & 3 |
1 & 2 |
1 & 2 |
2 & 3 |
1 & 2 |
1 & 2 |
1 & 2 |
4 & 5 |
|
256KB |
2 & 3 |
2 & 3 |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
|
512KB |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
1 & 2 |
4 & 5 |
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Note:Pins designated should be in the closed position. |
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CPU SPEED CONFIGURATION |
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Speed |
J7 |
J10 |
|
25MHz |
Closed |
Closed |
|
33MHz |
Open |
Closed |
|
50i MHz |
Closed |
Closed |
|
50MHz |
Open |
Open |
|
66i MHz |
Open |
Closed |
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CPU TYPE CONFIGURATION |
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|
U1 |
U2 |
JP1 |
JP2 |
JP3 |
|
80486SX |
NONE |
pins 1 & 2 closed |
pins 3 & 4 closed |
pins 2 & 3 closed |
|
NONE |
80486SX |
pins 1 & 2 closed |
pins 3 & 4 closed |
pins 2 & 3 closed |
|
NONE |
80486DX |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 and 3 & 4 closed |
|
NONE |
80486DX2 |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 and 3 & 4 closed |
|
80486SX |
80487SX |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 and 3 & 4 closed |
|
80486SX |
80486DX |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 and 3 & 4 closed |
|
80486SX |
80486DX2 |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 and 3 & 4 closed |
|
80486SX |
ODP486SX |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 1 & 2 and 3 & 4 closed |