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# UNIDENTIFIED
NESX
Processor 80386SX
Processor Speed 12/16MHz
Chip Set Neat
Video Chip Set None
Maximum Onboard Memory 8MB
Maximum Video Memory None
Cache None
BIOS AMI
Dimensions 330mm x 218mm
I/O Options None
NPU Options 80387SX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------------+----------+---------------+----------|
| Auxiliary keyboard | J1 | Reset switch | J9 |
| connector | | | |
|----------------------+----------+---------------+----------|
| External battery | J5 | Speaker | J12 |
|----------------------+----------+---------------+----------|
| Turbo switch | J7 | Power LED & | J13 |
| | | keylock | |
|----------------------+----------+---------------+----------|
| Turbo LED | J8 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|------------------------------------+-------+---------------|
| | Monitor type select color | J2 | Pins 1 & 2 |
| | | | closed |
|---+--------------------------------+-------+---------------|
| | Monitor type select monochrome | J2 | Pins 2 & 3 |
| | | | closed |
|---+--------------------------------+-------+---------------|
| ยป | CMOS memory normal operation | J6 | Open |
|---+--------------------------------+-------+---------------|
| | CMOS memory clear | J6 | Closed |
|---+--------------------------------+-------+---------------|
| | BIOS type select 27128 | J14 | Pins 1 & 2 |
| | | | closed |
|---+--------------------------------+-------+---------------|
| | BIOS type select 27256 | J14 | Pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION 1 |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank | Bank | Bank 2 | Bank 3 |
| | | | 0A | 1A | | |
|--------+--------+--------+-------+-------+--------+--------|
| 512KB | (18) | None | None | None | None | None |
| | 41256 | | | | | |
|--------+--------+--------+-------+-------+--------+--------|
| 1MB | (18) | (18) | None | None | None | None |
| | 41256 | 41256 | | | | |
|--------+--------+--------+-------+-------+--------+--------|
| 1.5MB | (18) | (18) | None | None | (4) | None |
| | 41256 | 41256 | | | 44256 | |
|--------+--------+--------+-------+-------+--------+--------|
| 2MB | (18) | (18) | None | None | (4) | (4) |
| | 41256 | 41256 | | | 44256 | 44256 |
|--------+--------+--------+-------+-------+--------+--------|
| 2MB | (18) | None | None | None | None | None |
| | 411000 | | | | | |
|--------+--------+--------+-------+-------+--------+--------|
| 3MB | (18) | (18) | None | (2) | None | None |
| | 41256 | 41256 | | 1M x | | |
| | | | | 9 | | |
|--------+--------+--------+-------+-------+--------+--------|
| 4MB | (18) | (18) | None | None | None | None |
| | 411000 | 411000 | | | | |
|--------+--------+--------+-------+-------+--------+--------|
| 5MB | (18) | (18) | (2) | (2) | None | None |
| | 41256 | 41256 | 1M x | 1M x | | |
| | | | 9 | 9 | | |
|--------+--------+--------+-------+-------+--------+--------|
| 6MB | (18) | (18) | None | (2) | None | None |
| | 411000 | 411000 | | 1M x | | |
| | | | | 9 | | |
|--------+--------+--------+-------+-------+--------+--------|
| 8MB | (18) | (18) | (2) | (2) | None | None |
| | 411000 | 411000 | 1M x | 1M x | | |
| | | | 9 | 9 | | |
|------------------------------------------------------------|
| Note: In addition to the above configurations, banks |
| 2 & 3 also will accept 41256 chips and banks 0A & 1A |
| will accept 256K x 9. If banks 2 & 3 are used, P2 & |
| P3 must be installed with 41256 chips (see DRAM |
| PARITY CONFIGURATION table). |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM PARITY CONFIGURATION 1 |
|------------------------------------------------------------|
| Size | P 2 | P 3 |
|------------------+--------------------+--------------------|
| 512KB | None | None |
|------------------+--------------------+--------------------|
| 1MB | None | None |
|------------------+--------------------+--------------------|
| 1.5MB | (4) 41256 | None |
|------------------+--------------------+--------------------|
| 2MB | (4) 41256 | (4) 41256 |
|------------------+--------------------+--------------------|
| 2MB | None | None |
|------------------+--------------------+--------------------|
| 3MB | None | None |
|------------------+--------------------+--------------------|
| 4MB | None | None |
|------------------+--------------------+--------------------|
| 5MB | None | None |
|------------------+--------------------+--------------------|
| 6MB | None | None |
|------------------+--------------------+--------------------|
| 8MB | None | None |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION 2 |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank | Bank | Bank 2 | Bank 3 |
| | | | 0A | 1A | | |
|-------+--------+--------+--------+-------+--------+--------|
| 512KB | None | None | None | None | None | (4) |
| | | | | | | 44256 |
|-------+--------+--------+--------+-------+--------+--------|
| 1MB | None | None | None | None | (4) | (4) |
| | | | | | 44256 | 44256 |
|-------+--------+--------+--------+-------+--------+--------|
| 1.5MB | None | (18) | None | None | (4) | (4) |
| | | 41256 | | | 44256 | 44256 |
|-------+--------+--------+--------+-------+--------+--------|
| 2MB | (18) | (18) | None | None | (4) | (4) |
| | 41256 | 41256 | | | 44256 | 44256 |
|-------+--------+--------+--------+-------+--------+--------|
| 2MB | None | None | (2) 1M | None | None | None |
| | | | x 9 | | | |
|-------+--------+--------+--------+-------+--------+--------|
| 3MB | None | (18) | None | None | (4) | (4) |
| | | 411000 | | | 44256 | 44256 |
|-------+--------+--------+--------+-------+--------+--------|
| 4MB | None | None | (2) 1M | (2) | None | None |
| | | | x 9 | 1M x | | |
| | | | | 9 | | |
|-------+--------+--------+--------+-------+--------+--------|
| 5MB | (18) | (18) | None | None | (4) | (4) |
| | 411000 | 411000 | | | 44256 | 44256 |
|-------+--------+--------+--------+-------+--------+--------|
| 6MB | None | (18) | (2) 1M | (2) | None | None |
| | | 411000 | x 9 | 1M x | | |
| | | | | 9 | | |
|-------+--------+--------+--------+-------+--------+--------|
| 8MB | (18) | (18) | (2) 1M | (2) | None | None |
| | 411000 | 411000 | x 9 | 1M x | | |
| | | | | 9 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM PARITY CONFIGURATION 2 |
|------------------------------------------------------------|
| Size | P 2 | P 3 |
|------------------+--------------------+--------------------|
| 512KB | None | (4) 41256 |
|------------------+--------------------+--------------------|
| 1MB | (4) 41256 | (4) 41256 |
|------------------+--------------------+--------------------|
| 1.5MB | (4) 41256 | (4) 41256 |
|------------------+--------------------+--------------------|
| 2MB | (4) 41256 | (4) 41256 |
|------------------+--------------------+--------------------|
| 2MB | None | None |
|------------------+--------------------+--------------------|
| 3MB | (4) 41256 | (4) 41256 |
|------------------+--------------------+--------------------|
| 4MB | None | None |
|------------------+--------------------+--------------------|
| 5MB | (4) 41256 | (4) 41256 |
|------------------+--------------------+--------------------|
| 6MB | None | None |
|------------------+--------------------+--------------------|
| 8MB | None | None |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Configuration | J11 |
|-------------------------------+----------------------------|
| 1 | Closed |
|-------------------------------+----------------------------|
| 2 | Open |
+------------------------------------------------------------+