OLIVETTI
M280
|
Processor |
80286 |
|
Processor Speed |
12MHz |
|
Chip Set |
Unidentified |
|
Max. Onboard DRAM |
1MB |
|
Cache |
None |
|
BIOS |
Unidentified |
|
Dimensions |
355mm x 304mm |
|
I/O Options |
Floppy drive interface, parallel port, serial port |
|
NPU Options |
80287 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Parallel port |
CN1 |
Floppy drive interface |
CN3 |
|
Serial port |
CN2 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
|
Memory size select 1MB |
JU1 pins 1 & 9 |
Open |
|
Memory size select 512KB |
JU1 pins 1 & 9 |
Closed | |
|
|
Parallel port enabled |
JU1 pins 6 & 14 |
Closed |
|
Parallel port disabled |
JU1 pins 6 & 14 |
Open | |
|
|
Serial port enabled |
JU1 pins 7 & 15 |
Closed |
|
Serial port disabled |
JU1 pins 7 & 15 |
Open | |
|
|
Factory configured - do not alter |
JU1 pins 8 & 16 |
Open |
|
|
System clock source select 24MHz on board clock |
JU2 pins 7 & 15 |
Open |
|
System clock source select external clock |
JU2 pins 7 & 15 |
Closed | |
|
|
NPU wait state select 3 wait states |
JU2 pins 8 & 16 |
Closed |
|
NPU wait state select 10 wait states |
JU2 pins 8 & 16 |
Open | |
|
|
Burn in enabled |
JU3 pins 1 & 5 |
Open |
|
Burn in disabled |
JU3 pins 1 & 5 |
Closed | |
|
|
Monitor type select color/Olivetti monochrome |
JU3 pins 2 & 6 |
Closed |
|
Monitor type select monochrome |
JU3 pins 2 & 6 |
Open | |
|
|
32KHz clock enabled |
JU3 pins 3 & 7 |
Closed |
|
32KHz clock disabled |
JU3 pins 3 & 7 |
Open | |
|
|
Factory configured - do not alter |
JU3 pins 4 & 8 |
Open |
|
|
14MHz clock enabled |
JU4 |
Closed |
|
14MHz clock disabled |
JU4 |
Open | |
|
|
1.8MHz clock enabled |
JU5 |
Closed |
|
1.8MHz clock disabled |
JU5 |
Open | |
|
|
Factory configured - do not alter |
JU8 |
Closed |
|
|
Factory configured - do not alter |
JU9 |
Closed |
|
Note: The locations of JU4, JU5, JU8 & JU9 are unidentified. | |||
|
DRAM CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
512KB |
(18) 41256 |
NONE |
|
1MB |
(18) 41256 |
(18) 41256 |
|
CPU SPEED CONFIGURATION | ||
|
Speed |
JU6 |
JU7 |
|
8MHz |
Open |
Closed |
|
12MHz |
Closed |
Open |
|
Note: The locations of JU6 & JU7 aare unidentified. | ||
|
NPU SPEED CONFIGURATION | ||||
|
Speed |
JU2 pins 1 & 9 |
JU2 pins 2 & 10 |
JU2 pins 3 & 11 |
JU2 pins 4 & 12 |
|
8MHz |
Open |
Open |
Open |
Open |
|
12MHz |
Closed |
Closed |
Closed |
Closed |
|
NPU SPEED CONFIGURATION (CONT) | |||
|
Speed |
JU10 |
JU11 |
JU12 |
|
8MHz |
Open |
Open |
Open |
|
12MHz |
Closed |
Closed |
Closed |
|
Note: The locations of JU10, JU11 & JU12 aare unidentified. | |||
|
BIOS CONFIGURATION | ||||
|
Type |
JU1 pins 2 & 10 |
JU1 pins 3 & 11 |
JU1 pins 4 & 12 |
JU1 pins 5 & 13 |
|
27128 |
Closed |
Open |
Closed |
Open |
|
27256 |
Open |
Closed |
Open |
Closed |
|
SCROLL MODE CONFIGURATION | ||
|
Setting |
JU2 pins 5 & 13 |
JU2 pins 6 & 14 |
|
Fast scroll |
Open |
Open |
|
Flicker scroll |
Closed |
Closed |