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# OLIVETTI
M4-4X/M4-6X/PCS4XX (BA204X)
Processor 80486SX/80487SX/80486DX/80486DX2
Processor Speed 25/33/50(internal)/66(internal)MHz
Chip Set Unidentified
Maximum Onboard 36MB
Memory
Cache None
BIOS Unidentified
Dimensions 254mm x 218mm
I/O Options Floppy drive interfaces (2), IDE interface,
parallel port, PS/2 mouse port, serial ports
(2), VGA port, riser slot, CD-ROM connector
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|------------------+--------+------------------------+-------|
| PS/2 mouse port | CN1 | CD -ROM connector | CN6 |
|------------------+--------+------------------------+-------|
| Parallel port | CN2 | IDE interface | CN7 |
|------------------+--------+------------------------+-------|
| Serial port 2 | CN3 | Floppy drive interface | CN8 |
|------------------+--------+------------------------+-------|
| Serial port 1 | CN4 | Floppy drive interface | CN9 |
|------------------+--------+------------------------+-------|
| VGA port | CN5 | Riser slot | SL1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Setting | Label | Position |
|---------------------------------------+-------+------------|
| » | Factory configured - do not alter | F1 | N/A |
|---+-----------------------------------+-------+------------|
| | Hard drives installed 1 | J2 | Closed |
|---+-----------------------------------+-------+------------|
| | Hard drives installed 2 | J2 | Open |
|---+-----------------------------------+-------+------------|
| » | Setup access disabled | J12 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Setup access enabled | J12 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| » | Mouse IRQ12 enabled | J13 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Mouse IRQ12 disabled | J13 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| » | Serial port 1 bootstrap enabled | J21 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Serial port 1 bootstrap disabled | J21 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| » | Serial port 2 bootstrap enabled | J25 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Serial port 2 bootstrap disabled | J25 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| » | Floppy drives not write protected | J33 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Floppy drives write protected | J33 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | J45 | N/A |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|-----------------+-------------------+----------------------|
| 4MB | 4MB | None |
|-----------------+-------------------+----------------------|
| 8MB | 4MB | (1) 1M x 36 |
|-----------------+-------------------+----------------------|
| 12MB | 4MB | (1) 2M x 36 |
|-----------------+-------------------+----------------------|
| 20MB | 4MB | (1) 4M x 36 |
|-----------------+-------------------+----------------------|
| 36MB | 4MB | (1) 8M x 36 |
|------------------------------------------------------------|
| Note: Bank 0 is factory configured and is not |
| configurable. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE |
|------------------------------------------------------------|
| Setting | J28 | J29 |
|--------------------+-------------------+-------------------|
| 80486SX (PQFP) | Pins 1 & 2 closed | Pins 1 & 2 closed |
|--------------------+-------------------+-------------------|
| 80486SX | Pins 1 & 2 closed | Pins 1 & 2 closed |
| (PQFP)/80487SX | | |
|--------------------+-------------------+-------------------|
| 80486SX | Pins 1 & 2 closed | Pins 1 & 2 closed |
| (PQFP)/80486DX2 | | |
|--------------------+-------------------+-------------------|
| 80486SX (PGA) | Pins 2 & 3 closed | Pins 1 & 2 closed |
|--------------------+-------------------+-------------------|
| 80487SX | Pins 1 & 2 closed | Pins 1 & 2 closed |
|--------------------+-------------------+-------------------|
| 80486DX | Pins 1 & 2 closed | Pins 2 & 3 closed |
|--------------------+-------------------+-------------------|
| 80486DX2 | Pins 1 & 2 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED |
|------------------------------------------------------------|
| Setting | J44 |
|------------------------------+-----------------------------|
| 25MHz | Closed |
|------------------------------+-----------------------------|
| 33MHz | Open |
|------------------------------+-----------------------------|
| 50iMHz | Closed |
|------------------------------+-----------------------------|
| 66iMHz | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO MEMORY |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|-------------------+--------------------+-------------------|
| 512KB | 512KB | None |
|-------------------+--------------------+-------------------|
| 1MB | 512KB | 512KB |
|------------------------------------------------------------|
| Note: Bank 0 is factory installed and is not configurable. |
| The chip sizes are unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MISCELLANEOUS TECHNICAL NOTE |
|------------------------------------------------------------|
| The location of pin 1 is unidentified. |
+------------------------------------------------------------+