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# NEC TECHNOLOGIES, INC.
READY 425, 433, & 466
Processor 80486SX/80487DX/80486DX/80486DX2
Processor 25/33/50(internal)/66(internal) MHz
Speed
Chip Set C & T
Max. Onboard 64MB
DRAM
Cache None
BIOS NEC
Dimensions 330mm x 218mm
I/O Options Fax/modem, floppy drive interface, IDE interface,
multi-function connector (PS/2 mouse, PS/2
keyboard, power LED), parallel port, proprietary
riser card, serial port, VGA port
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| Floppy drive | J1 | External battery | JP9 |
| interface | | | |
|------------------+----------+-------------------+----------|
| IDE interface | J2 | Speaker | JP11 |
|------------------+----------+-------------------+----------|
| Main board power | J7 & J8 | Multi-function | P1 |
| connector | | connector | |
|------------------+----------+-------------------+----------|
| RJ11 modem | J10 & | Parallel port | P2 |
| interface | J11 | | |
|------------------+----------+-------------------+----------|
| Proprietary | JA-1 | Serial port | P3 |
| riser card | | | |
| connection | | | |
|------------------+----------+-------------------+----------|
| IDE interface | JP6 | VGA port | P4 |
| LED | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|-------------------------------+---------------+------------|
| » | Parallel port (P2) select | JP13 | pins 1 & 2 |
| | LPT1/IRQ7 (378-37Fh) | | closed |
|---+---------------------------+---------------+------------|
| | Parallel port (P2) select | JP13 | pins 2 & 3 |
| | LPT2/IRQ5 (278-27Fh) | | closed |
|---+---------------------------+---------------+------------|
| » | Flash BIOS programable | JP14 | pins 1 & 2 |
| | via network disabled | | closed |
|---+---------------------------+---------------+------------|
| | Flash BIOS programable | JP14 | pins 2 & 3 |
| | via network enabled | | closed |
|---+---------------------------+---------------+------------|
| » | Onboard video enabled | SW1/1 | Off |
|---+---------------------------+---------------+------------|
| | Onboard video disabled | SW1/1 | On |
|---+---------------------------+---------------+------------|
| » | Floppy interface (J1) | SW1/2 | Off |
| | enabled | | |
|---+---------------------------+---------------+------------|
| | Floppy interface (J1) | SW1/2 | On |
| | disabled | | |
|---+---------------------------+---------------+------------|
| » | System password enabled | SW1/3 | Off |
|---+---------------------------+---------------+------------|
| | System password disabled | SW1/3 | On |
| | & cleared | | |
|---+---------------------------+---------------+------------|
| » | Flash BIOS write enabled | SW1/4 | Off |
|---+---------------------------+---------------+------------|
| | Flash BIOS write disabled | SW1/4 | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP1 | JP2 | JP12 |
|------------------+---------------+------------+------------|
| » | 80486SX PQFP | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | | closed | closed | closed |
|---+--------------+---------------+------------+------------|
| | 80486SX PGA | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
| | | closed | closed | closed |
|---+--------------+---------------+------------+------------|
| | 80487SX PGA | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | | closed | closed | closed |
|---+--------------+---------------+------------+------------|
| | 80486DX PGA | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | | closed | closed | closed |
|---+--------------+---------------+------------+------------|
| | 80486DX2 PGA | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Clock Speed | JP15 |
|----------------------------+-------------------------------|
| 25/50i MHz | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 33/66i MHz | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 1M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 1M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 1M x 36 | (1) 256K x | (1) 256K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 7MB | (1) 1M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 9MB | (1) 1M x 36 | (1) 1M x 36 | (1) 256K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 1M x 36 | (1) 1M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 13MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 4M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 17MB | (1) 4M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 4M x 36 | (1) 256K x | (1) 256K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 19MB | (1) 4M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 4M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 21MB | (1) 4M x 36 | (1) 1M x 36 | (1) 256K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 22MB | (1) 4M x 36 | (1) 1M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 25MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 28MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 33MB | (1) 4M x 36 | (1) 4M x 36 | (1) 256K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 34MB | (1) 4M x 36 | (1) 4M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 37MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 49MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 52MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
+------------------------------------------------------------+