...because we can't all be on the bleeding edge...
MYLEX CORPORATION
MDE486
|
Processor |
80486SX/80487SX/80486DX/ODP486SX/80486DX2 |
|
Processor Speed |
20/25/33/50(internal)/50/66(internal)MHz |
|
Chip Set |
OPTI |
|
Max. Onboard DRAM |
128MB |
|
Cache |
64/128/256/512KB |
|
BIOS |
Mylex |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit external memory card slot, floppy interface, IDE interface, parallel port, serial ports (2) |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
32-bit external memory card |
CN1 |
Reset switch |
P2 |
|
Serial port 1 |
CN2 |
Speaker |
P3 |
|
Serial port 2 |
CN3 |
Power LED & keylock |
P4 |
|
Parallel port |
CN4 |
Turbo LED |
P5 |
|
IDE interface |
CN5 |
IDE interface LED |
P6 |
|
Floppy drive interface |
CN6 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
| » |
Factory configured - do not alter |
J11 |
Open |
| » |
Factory configured - do not alter |
J12 |
Open |
| » |
Factory configured - do not alter |
J20 |
pins 2 & 3 closed |
| » |
Factory configured - do not alter |
J21 |
pins 1 & 2 closed |
| » |
Monitor type select color |
P1 |
Closed |
|
Monitor type select monochrome |
P1 |
Open | |
|
DRAM CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
4MB |
(4) 256K x 36 |
NONE |
NONE |
NONE |
|
8MB |
(4) 256K x 36 |
(4) 256K x 36 |
NONE |
NONE |
|
12MB |
(4) 256K x 36 |
(4) 256K x 36 |
(4) 256K x 36 |
NONE |
|
16MB |
(4) 256K x 36 |
(4) 256K x 36 |
(4) 256K x 36 |
(4) 256K x 36 |
|
16MB |
(4) 1M x 36 |
NONE |
NONE |
NONE |
|
20MB |
(4) 1M x 36 |
(4) 256K x 36 |
NONE |
NONE |
|
24MB |
(4) 1M x 36 |
(4) 256K x 36 |
(4) 256K x 36 |
NONE |
|
28MB |
(4) 1M x 36 |
(4) 256K x 36 |
(4) 256K x 36 |
(4) 256K x 36 |
|
32MB |
(4) 1M x 36 |
(4) 1M x 36 |
NONE |
NONE |
|
36MB |
(4) 1M x 36 |
(4) 1M x 36 |
(4) 256K x 36 |
NONE |
|
40MB |
(4) 1M x 36 |
(4) 1M x 36 |
(4) 256K x 36 |
(4) 256K x 36 |
|
48MB |
(4) 1M x 36 |
(4) 1M x 36 |
(4) 1M x 36 |
NONE |
|
52MB |
(4) 1M x 36 |
(4) 1M x 36 |
(4) 1M x 36 |
(4) 256K x 36 |
|
64MB |
(4) 1M x 36 |
(4) 1M x 36 |
(4) 1M x 36 |
(4) 1M x 36 |
|
64MB |
(4) 4M x 36 |
NONE |
NONE |
NONE |
|
128MB |
(4) 4M x 36 |
(4) 4M x 36 |
NONE |
NONE |
|
192MB |
(4) 4M x 36 |
(4) 4M x 36 |
(4) 4M x 36 |
NONE |
|
256MB |
(4) 4M x 36 |
(4) 4M x 36 |
(4) 4M x 36 |
(4) 4M x 36 |
|
Note:Banks 2 and 3 are used when a 32-bit external memory card is installed at CN1. | ||||
|
CACHE CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
TAG (U19) |
TAG (U20) |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(1) 8K x 8 |
NONE |
|
128KB |
(4) 32K x 8 |
NONE |
(1) 8K x 8 |
NONE |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 8K x 8 |
(1) 8K x 8 |
|
512KB |
(4) 128K x 8 |
NONE |
(1) 32K x 8 |
NONE |
|
CACHE JUMPER CONFIGURATION | |||||||
|
Size |
J1 |
J2 |
J3 |
J4 |
J5 |
J6 |
J8 |
|
64KB |
Open |
Open |
Open |
Open |
Open |
Open |
2 & 3 |
|
128KB |
Open |
Open |
Closed |
Open |
Closed |
Open |
1 & 2 |
|
256KB |
Open |
Closed |
Closed |
Closed |
Closed |
Open |
2 & 3 |
|
512KB |
Closed |
Closed |
Closed |
Closed |
Closed |
Closed |
1 & 2 |
|
Note: Pins designated should be in the closed position. | |||||||
|
CPU TYPE CONFIGURATION | ||
|
Type |
J9 |
J10 |
|
80486SX |
Open |
pins 1 & 2, 3 & 4 closed |
|
ODP486SX |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
80487SX |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
80486DX |
pins 2 & 3 closed |
pins 1 & 2, 3 & 4 closed |
|
80486DX2 |
pins 2 & 3 closed |
pins 1 & 2, 3 & 4 closed |
|
CPU SPEED CONFIGURATION | ||||||||
|
Speed |
J7 |
J13 |
J14 |
J15 |
J16 |
J17 |
J18 |
J19 |
|
20MHz |
Closed |
Open |
Open |
Closed |
Open |
Open |
1 & 2 |
1 & 2 |
|
25MHz |
Open |
Closed |
Closed |
Open |
Open |
Open |
1 & 2 |
2 & 3 |
|
33MHz |
Open |
Open |
Closed |
Open |
Closed |
Open |
1 & 2 |
2 & 3 |
|
50iMHz |
Open |
Closed |
Closed |
Open |
Open |
Open |
1 & 2 |
2 & 3 |
|
50MHz |
Open |
Open |
Open |
Open |
Closed |
Closed |
2 & 3 |
2 & 3 |
|
66iMHz |
Open |
Open |
Closed |
Open |
Closed |
Open |
1 & 2 |
2 & 3 |
|
Note: Pins designated should be in the closed position. | ||||||||