MAGITRONICS
486SX/486DX/486DX2 (VER. 2)
|
Processor |
80486SX/80486DX/80486DX2/Pentium Overdrive |
|
Processor Speed |
25/33/40/50(internal)/50/66(internal)MHz |
|
Chip Set |
Unidentified |
|
Max. Onboard DRAM |
64MB |
|
Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
254mm x 220mm |
|
I/O Options |
32-bit VESA local bus slots (3) |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J1 |
Speaker |
JP16 |
|
Power LED & keylock |
J21 |
Reset switch |
S1 |
|
Turbo LED |
JP12 |
32-bit VESA local bus slots |
SL1 - SL3 |
|
Turbo switch |
JP13 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
|
CMOS memory normal operation |
JP1 |
pins 2 & 3 closed |
|
CMOS memory clear |
JP1 |
pins 1 & 2 closed | |
|
|
Monitor type select color |
JP2 |
Closed |
|
Monitor type select monochrome |
JP2 |
Open | |
|
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 |
|
17MB |
(4) 256K x 9 |
(4) 4M x 9 |
|
20MB |
(4) 1M x 9 |
(4) 4M x 9 |
|
20MB |
(4) 4M x 9 |
(4) 1M x 9 |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
64MB |
(4) 16M x 9 |
NONE |
|
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) 16K x 8 or (1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION | ||||
|
Size |
JP3 |
JP5 |
JP8 |
JP9 |
|
64KB |
pins 2 & 3 closed |
pins 2 & 3 closed |
Open |
Open |
|
128KB |
pins 1 & 2 closed |
pins 1 & 2 closed |
Closed |
Open |
|
256KB |
pins 2 & 3 closed |
pins 2 & 3 closed |
Closed |
Closed |
|
CPU TYPE CONFIGURATION | |||
|
Type |
JP6 |
JP7 |
JP11 |
|
80486SX |
pins 2 & 3 closed |
pins 2 & 3 closed |
Open |
|
80486DX/DX2 |
pins 1 & 2 closed |
pins 1 & 2 closed |
Closed |
|
CPU SPEED CONFIGURATION | |||
|
Speed |
JP18 |
JP19 |
JP20 |
|
25MHz |
Closed |
Open |
Closed |
|
33MHz |
Closed |
Closed |
Open |
|
40MHz |
Open |
Open |
Closed |
|
50iMHz |
Closed |
Open |
Closed |
|
50MHz |
Open |
Closed |
Open |
|
66iMHz |
Closed |
Closed |
Open |
|
CPU ADS DELAY CONFIGURATION | |
|
Speed |
JP21 |
|
33MHz |
pins 2 & 3 closed |
|
40MHz |
pins 1 & 2 closed |
|
50MHz |
pins 1 & 2 closed |
|
66iMHz |
pins 2 & 3 closed |
|
VESA WAIT STATE CONFIGURATION | |
|
Wait states |
JP17 |
|
0 wait states |
Open |
|
1 wait state |
Closed |
|
Note: The location of JP17 is unknown. | |
|
BUS SPEED CONFIGURATION | |
|
CPU speed |
JP14 |
|
<= 33MHz |
Open |
|
> 33MHz |
Closed |
|
Note: The location of JP14 is unknown. | |
|
MISCELLANEOUS TECHNICAL NOTE |
|
Note:The location of jumpers on diagram are for identification purposes and may not be the actual location. |