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# OLIVETTI
M24/M24SP
Processor 8086
Processor 8/10MHz
Speed
Chip Set Unidentified
Max. Onboard 640KB
DRAM
Cache None
BIOS Unidentified
Dimensions 355mm x 304mm
I/O Options Floppy drive interface, parallel port, serial
ports (2)
NPU Options 8087
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------------+----------+---------------+----------|
| Floppy drive | CN1 | Parallel port | J4 |
| interface | | | |
|----------------------+----------+---------------+----------|
| Serial port 1 | J3 | Serial port 2 | J5 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Switch | Position |
|--------------------------------------+----------+----------|
| » | 256KB memory chip not used | DIPSW0/5 | On |
|---+----------------------------------+----------+----------|
| | 256KB memory chip used | DIPSW0/5 | Off |
|---+----------------------------------+----------+----------|
| » | NPU disabled | DIPSW0/6 | On |
|---+----------------------------------+----------+----------|
| | NPU enabled | DIPSW0/6 | Off |
|---+----------------------------------+----------+----------|
| » | UART type select 8250 | DIPSW0/7 | On |
|---+----------------------------------+----------+----------|
| | UART type select 8530 | DIPSW0/7 | Off |
|---+----------------------------------+----------+----------|
| » | BIOS type select 2732 (M24 only) | DIPSW0/8 | On |
|---+----------------------------------+----------+----------|
| | BIOS type select 2764 (M24 only) | DIPSW0/8 | Off |
|---+----------------------------------+----------+----------|
| » | No memory installed in Bank 0 | DIPSW0/8 | On |
| | (M24SP only) | | |
|---+----------------------------------+----------+----------|
| | Memory installed in Bank 0 | DIPSW0/8 | Off |
| | (M24SP only) | | |
|---+----------------------------------+----------+----------|
| » | Floppy drive tracks per inch | DIPSW1/1 | On |
| | select 48 (320KB drive) | | |
|---+----------------------------------+----------+----------|
| | Floppy drive tracks per inch | DIPSW1/1 | Off |
| | select 96 (640KB drive) | | |
|---+----------------------------------+----------+----------|
| » | Floppy drive start up speed | DIPSW1/2 | On |
| | select slow | | |
|---+----------------------------------+----------+----------|
| | Floppy drive start up speed | DIPSW1/2 | Off |
| | select fast | | |
|---+----------------------------------+----------+----------|
| » | HDU ROM code select on mainboard | DIPSW1/3 | On |
|---+----------------------------------+----------+----------|
| | HDU ROM code select on | DIPSW1/3 | Off |
| | controller | | |
|---+----------------------------------+----------+----------|
| » | Display controller select | DIPSW1/4 | On |
| | standard | | |
|---+----------------------------------+----------+----------|
| | Display controller select non | DIPSW1/4 | Off |
| | standard | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|--------------------+-------------------+-------------------|
| 128KB | (18) 44256 | NONE |
|--------------------+-------------------+-------------------|
| 256KB | (18) 44256 | (18) 44256 |
|--------------------+-------------------+-------------------|
| 512KB | (18) 44100 | NONE |
|--------------------+-------------------+-------------------|
| 640KB (M24SP only) | (18) 44100 | (18) 44256 |
|--------------------+-------------------+-------------------|
| 640KB | (18) 44256 | (18) 44100 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM SWITCH CONFIGURATION |
|------------------------------------------------------------|
| Size | DIPSW0/1 | DIPSW0/2 | DIPSW0/3 | DIPSW0/4 |
|----------------+----------+----------+----------+----------|
| 128KB | Off | On | On | On |
|----------------+----------+----------+----------+----------|
| 256KB | On | Off | On | On |
|----------------+----------+----------+----------+----------|
| 384KB | Off | Off | On | On |
|----------------+----------+----------+----------+----------|
| 512KB | On | On | On | Off |
| (mainboard | | | | |
| only) | | | | |
|----------------+----------+----------+----------+----------|
| 512KB | On | On | Off | On |
| (mainboard and | | | | |
| expansion | | | | |
| card) | | | | |
|----------------+----------+----------+----------+----------|
| 640KB | Off | On | Off | On |
|----------------+----------+----------+----------+----------|
| 640KB | Off | On | On | Off |
| (mainboard | | | | |
| only) | | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO CONFIGURATION |
|------------------------------------------------------------|
| Type | DIPSW1/5 | DIPSW1/6 |
|--------------------+-------------------+-------------------|
| IBM B/W display | Off | Off |
|--------------------+-------------------+-------------------|
| 40 x 25 | Off | On |
|--------------------+-------------------+-------------------|
| 80 x 25 | On | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOPPY DRIVE CONFIGURATION |
|------------------------------------------------------------|
| Drives installed | DIPSW1/7 | DIPSW1/8 |
|--------------------+-------------------+-------------------|
| 1 | On | On |
|--------------------+-------------------+-------------------|
| 2 | Off | On |
+------------------------------------------------------------+