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# UNIDENTIFIED
MB-1212V
Processor 80286
Processor Speed 10/12MHz
Chip Set VLSI
Max. Onboard DRAM 4MB
Cache None
BIOS AMI/Award/Phoenix
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 | Position |
|-------------------------------------+---------+------------|
| ยป | Memory speed select 100ns | JP6 | pins 1 & 2 |
| | | | closed |
|---+---------------------------------+---------+------------|
| | Wait state select 0 wait states | JP10 | Closed |
|---+---------------------------------+---------+------------|
| | Wait state select 1 wait state | JP10 | Open |
|---+---------------------------------+---------+------------|
| | 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 monochrome | JP12 | pins 2 & 3 |
| | | | closed |
|---+---------------------------------+---------+------------|
| | Power good signal detect from | JP16 | see note |
| | power supply | | |
|---+---------------------------------+---------+------------|
| | Power good signal detect from | JP16 | see note |
| | board | | |
|---+---------------------------------+---------+------------|
| | Parity check enabled | JP19 | pins 1 & 2 |
| | | | closed |
|---+---------------------------------+---------+------------|
| | Parity check disabled | JP19 | pins 2 & 3 |
| | | | closed |
|------------------------------------------------------------|
| Note: JP19 is an optional jumper and may not be |
| present on all boards. The settings for JP16 are |
| unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 0A | Bank 1 | Bank 1A | Bank |
| | | | | | 1B |
|-------+------------+----------+---------+----------+-------|
| 512KB | NONE | (4) | NONE | NONE | NONE |
| | | 44256 | | | |
|-------+------------+----------+---------+----------+-------|
| 640KB | NONE | (4) | NONE | NONE | (4) |
| | | 44256 | | | 4164 |
|-------+------------+----------+---------+----------+-------|
| 640KB | NONE | (4) | (18) | NONE | NONE |
| | | 44256 | 4164 | | |
|-------+------------+----------+---------+----------+-------|
| 1MB | NONE | (4) | NONE | (4) | NONE |
| | | 44256 | | 44256 | |
|-------+------------+----------+---------+----------+-------|
| 2MB | (18) 41100 | NONE | NONE | NONE | NONE |
|-------+------------+----------+---------+----------+-------|
| 4MB | (18) 41100 | NONE | (18) | NONE | NONE |
| | | | 41100 | | |
|------------------------------------------------------------|
| Note: See table below for parity configuration. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM PARITY CONFIGURATION |
|------------------------------------------------------------|
| Size | P 0 | P 1 |
|------------------+--------------------+--------------------|
| 512KB | (2) 41256 | NONE |
|------------------+--------------------+--------------------|
| 640KB | (2) 41256 | NONE |
|------------------+--------------------+--------------------|
| 640KB | (2) 41256 | NONE |
|------------------+--------------------+--------------------|
| 1MB | (2) 41256 | (2) 41256 |
|------------------+--------------------+--------------------|
| 2MB | NONE | NONE |
|------------------+--------------------+--------------------|
| 4MB | NONE | NONE |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP7 | JP8 | JP9 |
|--------------+---------------+--------------+--------------|
| 512KB | Closed | Closed | Closed |
|--------------+---------------+--------------+--------------|
| 640KB | Closed | Closed | Open |
|--------------+---------------+--------------+--------------|
| 1MB | Closed | Open | Closed |
|--------------+---------------+--------------+--------------|
| 2MB | Closed | Open | Open |
|--------------+---------------+--------------+--------------|
| 4MB | Open | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| KEYBOARD BIOS CONFIGURATION |
|------------------------------------------------------------|
| Setting | JP13 | JP14 | JP15 | JP18 |
|----------------------+---------+---------+--------+--------|
| Controller on pin 30 | Closed | Open | Open | Open |
|----------------------+---------+---------+--------+--------|
| Controller on pin 23 | Open | Closed | Open | Open |
|----------------------+---------+---------+--------+--------|
| Controller on pin 27 | Open | Open | Closed | Open |
|----------------------+---------+---------+--------+--------|
| Controller on pin 32 | Open | Open | Open | Closed |
+------------------------------------------------------------+