AMERICAN MEGATRENDS, INC.
286 MOTHERBOARD
|
Processor |
80286 |
|
Processor Speed |
8/10/12MHz |
|
Chip Set |
Unidentified |
|
Video Chip Set |
None |
|
Maximum Onboard Memory |
1MB |
|
Maximum Video Memory |
None |
|
Cache |
None |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
None |
|
NPU Options |
80287 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Speaker |
J24 |
Reset switch |
J29 pins 1 & 2 |
|
Power LED & keylock |
J26 |
Turbo LED |
J29 pins 3 & 4 |
|
Reset switch |
J28 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Label |
Position | |
|
|
Factory configured - do not alter |
J15 |
Unidentified |
|
ROM wait state select 2 wait states |
J17 |
Closed | |
|
ROM wait state select 1 wait state |
J17 |
Open | |
|
Monitor type select color |
J23 |
Closed | |
|
Monitor type select monochrome |
J23 |
Open | |
|
I/O wait state enabled |
J27 |
Closed | |
|
I/O wait state disabled |
J27 |
Open | |
|
DRAM CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
512KB |
(18) 41256 |
None |
|
640KB |
(18) 41256 |
(18) 4164 |
|
1MB |
(18) 41256 |
(18) 41256 |
|
Note: The location of banks 0 & 1 are unidentified. | ||
|
DRAM JUMPER CONFIGURATION | ||
|
Size |
J21 |
J22 |
|
512KB |
Closed |
Closed |
|
640KB |
Open |
Closed |
|
1MB |
Closed |
Open |
|
RAM WAIT STATE SELECTION | ||
|
Wait state |
J16 |
J18 |
|
0 |
Open |
Closed |
|
1 |
Closed |
Open |
|
BIOS SELECTION | ||
|
Type |
J30 |
J31 |
|
27128 |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
|
27256 |
Open |
Pins 1 & 2 closed |
|
27512 |
Pins 2 & 3 closed |
Pins 2 & 3 closed |