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# NEC TECHNOLOGIES, INC.
BusinessMate 486/25E
Processor 80486DX
Processor Speed 25MHz
Chip Set Intel
Max. Onboard 16MB (on system memory card)
DRAM
Cache None
BIOS NEC (flash EEPROM)
Dimensions 330mm x 218mm
I/O Options Proprietary serial/parallel card, keyboard/Bus
mouse interface, floppy drive interface,
proprietary system memory bus
NPU Options 80387/3167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------+----------+--------------------+----------|
| Proprietary | J8 | Floppy drive | P7 |
| system memory | | interface | |
| bus | | | |
|-----------------+----------+--------------------+----------|
| Speaker | P1 | Power supply | P8 |
|-----------------+----------+--------------------+----------|
| Keyboard/Bus | P2 | Drive power supply | P9 |
| mouse interface | | | |
|-----------------+----------+--------------------+----------|
| External | P3 | Proprietary | P10 |
| battery | | serial/parallel | |
| | | card | |
|-----------------+----------+--------------------+----------|
| Power LED & | P6 | Auxiliary drive | P12 |
| Turbo LED | | power supply | |
|------------------------------------------------------------|
| Note: Either a proprietary system memory card or a |
| proprietary memory bus expansion card may be installed at |
| J8. The proprietary memory bus expansion card has four |
| slots that may be populated by up to four 2MB expansion |
| cards. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|---------------------------------+---------------+----------|
| » | RDY signal from DODA select | 11B2 | pins 1 & |
| | DMY RDY | | 2 closed |
|---+-----------------------------+---------------+----------|
| | RDY signal from DODA select | 11B2 | pins 2 & |
| | BRDY | | 3 closed |
|---+-----------------------------+---------------+----------|
| » | Factory configured - do not | 18F1 | Open |
| | alter | | |
|---+-----------------------------+---------------+----------|
| » | EISA memory write speed | 18F2 | Closed |
| | select 0 wait states | | |
|---+-----------------------------+---------------+----------|
| | EISA memory write speed | 18F2 | Open |
| | select 1 wait state | | |
|---+-----------------------------+---------------+----------|
| » | CPU self-test enabled | 21D1 & 4D1 | pins 1 & |
| | | | 2 closed |
|---+-----------------------------+---------------+----------|
| | CPU self-test enabled | 21D1 & 4D1 | pins 2 & |
| | | | 3 closed |
|---+-----------------------------+---------------+----------|
| » | Floppy interface transfer | 2D1 | pins 1 & |
| | rate 500/300/250/150/125KB | | 2 closed |
|---+-----------------------------+---------------+----------|
| | Floppy interface transfer | 2D1 | pins 2 & |
| | rate 500/300/250/150KB | | 3 closed |
|---+-----------------------------+---------------+----------|
| » | Reset enabled | 2J1 | Open |
|---+-----------------------------+---------------+----------|
| | Reset disabled | 2J1 | Closed |
|---+-----------------------------+---------------+----------|
| » | Test mode disabled | 2N2 | Open |
|---+-----------------------------+---------------+----------|
| | Test mode enabled | 2N2 | Closed |
|---+-----------------------------+---------------+----------|
| » | Password enabled | 5J2 | pins 1 & |
| | | | 2 closed |
|---+-----------------------------+---------------+----------|
| | Password disabled | 5J2 | pins 2 & |
| | | | 3 closed |
|---+-----------------------------+---------------+----------|
| » | A20 gate output select | 5J3 | pins 1 & |
| | keyboard controller | | 2 closed |
|---+-----------------------------+---------------+----------|
| | A20 gate output select PAL | 5J3 | pins 2 & |
| | (Novell workaround) | | 3 closed |
|---+-----------------------------+---------------+----------|
| » | Keyboard controller W/R | 5K3 | pins 1 & |
| | select PAL (Novell | | 2 closed |
| | workaround) | | |
|---+-----------------------------+---------------+----------|
| | Keyboard controller W/R | 5K3 | pins 2 & |
| | select normal XIOWT | | 3 closed |
|---+-----------------------------+---------------+----------|
| » | Keyboard controller input | 5K4 | pins 1 & |
| | select 12HMz | | 2 closed |
|---+-----------------------------+---------------+----------|
| | Keyboard controller input | 5K4 | pins 2 & |
| | select 8.33HMz | | 3 closed |
|---+-----------------------------+---------------+----------|
| » | STBY signal for RTC select | 6K3 | pins 1 & |
| | PWREN -0 | | 2 closed |
|---+-----------------------------+---------------+----------|
| | STBY signal for RTC select | 6K3 | pins 2 & |
| | PWREN +0 | | 3 closed |
|---+-----------------------------+---------------+----------|
| » | ROM test mode (looping) | 8M2 | Open |
| | disabled | | |
|---+-----------------------------+---------------+----------|
| | ROM test mode (looping) | 8M2 | Closed |
| | enabled | | |
|---+-----------------------------+---------------+----------|
| » | Factory configured - do not | 9E1 | pins 2 & |
| | alter | | 3 closed |
|---+-----------------------------+---------------+----------|
| » | Factory configured - do not | 9E2 | pins 2 & |
| | alter | | 3 closed |
|---+-----------------------------+---------------+----------|
| » | Monitor type select color | SW1/1 | On |
|---+-----------------------------+---------------+----------|
| | Monitor type select | SW1/1 | Off |
| | monochrome | | |
|---+-----------------------------+---------------+----------|
| » | Floppy drive interface | SW1/2 | Off |
| | address select primary | | |
| | (drive A) | | |
|---+-----------------------------+---------------+----------|
| | Floppy drive interface | SW1/2 | On |
| | address select secondary | | |
| | (drive B) | | |
|---+-----------------------------+---------------+----------|
| » | Floppy drive interface | SW1/3 | On |
| | enabled | | |
|---+-----------------------------+---------------+----------|
| | Floppy drive interface | SW1/3 | Off |
| | disabled | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS (CON'T) |
|------------------------------------------------------------|
| Function | Switch | Position |
|-------------------------------------+----------+-----------|
| » | Serial port (COM2) enabled | SW1/4 | On |
|---+---------------------------------+----------+-----------|
| | Serial port (COM2) disabled | SW1/4 | Off |
|---+---------------------------------+----------+-----------|
| » | Serial port (COM1) enabled | SW1/5 | On |
|---+---------------------------------+----------+-----------|
| | Serial port (COM1) disabled | SW1/5 | Off |
|---+---------------------------------+----------+-----------|
| » | Parallel port enabled | SW1/6 | On |
|---+---------------------------------+----------+-----------|
| | Parallel port disabled | SW1/6 | Off |
|---+---------------------------------+----------+-----------|
| » | NPU enabled | SW1/7 | On |
|---+---------------------------------+----------+-----------|
| | NPU disabled | SW1/7 | Off |
|---+---------------------------------+----------+-----------|
| » | Bus mouse enabled | SW1/8 | On |
|---+---------------------------------+----------+-----------|
| | Bus mouse disabled | SW1/8 | Off |
|---+---------------------------------+----------+-----------|
| » | Base memory size select 640KB | SW1/9 | On |
|---+---------------------------------+----------+-----------|
| | Base memory size select 512KB | SW1/9 | Off |
|---+---------------------------------+----------+-----------|
| » | Factory configured - do not | SW1/10 | Off |
| | alter | | |
|---+--------------------------------------------------------|
| | Notes: Serial parallel ports are located on the |
| | proprietary serial/parallel card. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MEMORY READ SPEED CONFIGURATION |
|------------------------------------------------------------|
| Wait states | 18F3 | 19F1 |
|--------------------+--------------------+------------------|
| 0 | Closed | Closed |
|--------------------+--------------------+------------------|
| 1 | Open | Closed |
|--------------------+--------------------+------------------|
| 2 | Closed | Open |
|--------------------+--------------------+------------------|
| 3 | Open | Open |
+------------------------------------------------------------+
SYSTEM MEMORY CARD (G8FHW)
IMG IMG 2
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
|Size |Bank 0 |Bank 1 |Bank 2 |Bank 3|Bank 4|Bank 5|Bank|Bank|
| | | | | | | | 6 | 7 |
|-----+-------+-------+-------+------+------+------+----+----|
| 2MB | 2MB | NONE | NONE | NONE | NONE | NONE |NONE|NONE|
|-----+-------+-------+-------+------+------+------+----+----|
| 4MB | 2MB | 2MB | NONE | NONE | NONE | NONE |NONE|NONE|
|-----+-------+-------+-------+------+------+------+----+----|
| 6MB | 2MB | 2MB | 2MB | NONE | NONE | NONE |NONE|NONE|
|-----+-------+-------+-------+------+------+------+----+----|
| 8MB | 2MB | 2MB | 2MB | 2MB | NONE | NONE |NONE|NONE|
|-----+-------+-------+-------+------+------+------+----+----|
|10MB | 2MB | 2MB | 2MB | 2MB | 2MB | NONE |NONE|NONE|
|-----+-------+-------+-------+------+------+------+----+----|
|12MB | 2MB | 2MB | 2MB | 2MB | 2MB | 2MB |NONE|NONE|
|-----+-------+-------+-------+------+------+------+----+----|
|14MB | 2MB | 2MB | 2MB | 2MB | 2MB | 2MB |2MB |NONE|
|-----+-------+-------+-------+------+------+------+----+----|
|16MB | 2MB | 2MB | 2MB | 2MB | 2MB | 2MB |2MB |2MB |
|------------------------------------------------------------|
|Note: Location of Bank 0 is unidentified. Banks are filled |
|with proprietary 2MB memory modules (NEC part # |
|13-260131-502-A). Either a proprietary system memory card or|
|a proprietary memory bus expansion card may be installed at |
|J8. The proprietary memory bus expansion card has four slots|
|that may be populated by up to four 2MB expansion cards. |
+------------------------------------------------------------+