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# UNIDENTIFIED
MBVLSI-168 B
Processor 80286
Processor Speed 12MHz
Chip Set VLSI
Max. onboard DRAM 4MB
Cache None
BIOS AMI
Dimensions 330mm x 218mm
I/O Options None
NPU Options 80287
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Reset switch | JP1 | Turbo Switch | JP4 |
|-------------------+----------+------------------+----------|
| Power LED & | JP2 | Turbo LED | JP5 |
| keylock | | | |
|-------------------+----------+------------------+----------|
| Speaker | JP3 | External battery | JP17 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|-------------------------------+---------------+------------|
| » | Memory speed select - do | JP6 | N/A |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Wait state select 0 wait | JP10 | Closed |
| | states | | |
|---+---------------------------+---------------+------------|
| » | Wait state select 1 wait | JP10 | Open |
| | state | | |
|---+---------------------------+---------------+------------|
| » | BIOS type select 27256 | JP11 | pins 1 & 2 |
| | | | closed |
|---+---------------------------+---------------+------------|
| | BIOS type select 27128 | JP11 | pins 2 & 3 |
| | | | closed |
|---+---------------------------+---------------+------------|
| » | Monitor type select color | JP12 | pins 1 & 2 |
| | | | closed |
|---+---------------------------+---------------+------------|
| | Monitor type select | JP12 | pins 2 & 3 |
| | monochrome | | closed |
|---+---------------------------+---------------+------------|
| » | Power good detect - do | JP16 | N/A |
| | not alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
|Size | Bank 0 |Parity 0|Bank 1 |Parity| JP7 | JP8 | JP9 |
| | | | | 2 | | | |
|-----+---------+--------+-------+------+------+------+------|
|512KB|(4) 44256| (2) | NONE | NONE |Closed|Closed|Closed|
| | | 41256 | | | | | |
|-----+---------+--------+-------+------+------+------+------|
|640KB|(4) 44256| (2) | (4) | (2) |Closed|Closed| Open |
| | | 41256 | 4464 | 4164 | | | |
|-----+---------+--------+-------+------+------+------+------|
|640KB|(4) 44256| (2) | (16) | (2) |Closed|Closed| Open |
| | | 41256 | 4164 | 4164 | | | |
|-----+---------+--------+-------+------+------+------+------|
| 1MB |(4) 44256| (2) | (4) | (2) |Closed| Open |Closed|
| | | 41256 | 44256 | 4164 | | | |
|-----+---------+--------+-------+------+------+------+------|
| 1MB |(4) 44256| (2) | (16) | (2) |Closed| Open |Closed|
| | | 41256 | 4164 | 4164 | | | |
|-----+---------+--------+-------+------+------+------+------|
| 2MB | (18) | NONE | NONE | NONE |Closed| Open | Open |
| | 411000 | | | | | | |
|-----+---------+--------+-------+------+------+------+------|
| 4MB | (18) | NONE | (18) | NONE | Open |Closed|Closed|
| | 411000 | |411000 | | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| KEYBOARD CONTROLLER CONFIGURATION |
|------------------------------------------------------------|
| Pin Number | JP13 | JP14 | JP15 | JP18 |
|--------------+-----------+-----------+----------+----------|
| 23 | Open | Closed | Open | Open |
|--------------+-----------+-----------+----------+----------|
| 27 | Open | Open | Closed | Open |
|--------------+-----------+-----------+----------+----------|
| 30 | Closed | Open | Open | Open |
|--------------+-----------+-----------+----------+----------|
| 32 | Open | Open | Open | Closed |
|------------------------------------------------------------|
| Note:Make sure that the BIOS and the keyboard controller |
| are compatible before shorting a controller pin for speed |
| change via software. |
+------------------------------------------------------------+