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# UNIDENTIFIED
C & T TURBO MAINBOARD
Processor 80286
Processor Speed 12 MHz
Chip Set C & T
Max. Onboard DRAM 4MB
Cache None
BIOS AMI/C & T
Dimensions 260mm x 220mm
I/O Options None
NPU Options 80287
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| External battery | BAT | Turbo LED | JP1 |
|---------------------+----------+----------------+----------|
| Power LED & keylock | J1 | Reset switch | JP2 |
|---------------------+----------+----------------+----------|
| Speaker | J2 | Turbo switch | JP3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | NPU synchronous with CPU | JP4 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | NPU asynchronous with CPU | JP4 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | JP6 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | JP6 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Power good signal detect from | JP7 | pins 2 & 3 |
| | power supply | | closed |
|---+----------------------------------+--------+------------|
| | Power good signal detect from | JP7 | pins 1 & 2 |
| | board | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (DIP) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 512KB | (4) 44256 | NONE |
|------------------+--------------------+--------------------|
| 640KB | (4) 44256 | (4) 4464 |
|------------------+--------------------+--------------------|
| 1MB | (4) 44256 | (4) 44256 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM PARITY CONFIGURATION (DIP) |
|------------------------------------------------------------|
| Size | P0 | P1 |
|------------------+--------------------+--------------------|
| 512KB | (2) 41256 | NONE |
|------------------+--------------------+--------------------|
| 640KB | (2) 41256 | (2) 4164 |
|------------------+--------------------+--------------------|
| 1MB | (2) 41256 | (2) 41256 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (SIP) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 512KB | (2) 256K x 9 | NONE |
|------------------+--------------------+--------------------|
| 1MB | (2) 256K x 9 | (2) 256K x 9 |
|------------------+--------------------+--------------------|
| 2MB | (2) 1M x 9 | NONE |
|------------------+--------------------+--------------------|
| 4MB | (2) 1M x 9 | (2) 1M x 9 |
+------------------------------------------------------------+