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# UNIDENTIFIED
MB286T 12/16
Processor 80286
Processor Speed 12/16MHz
Chip Set Goldstar
Max. Onboard DRAM 5MB
SRAM Cache None
BIOS AMI
Dimensions 220mm x 230mm
I/O Options None
NPU Options 80287
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| Power LED & keylock | J4 | Turbo LED | J8 |
|---------------------+----------+----------------+----------|
| External battery | JP5 | Reset switch | J11 |
|---------------------+----------+----------------+----------|
| Turbo switch | J7 | Speaker | J13 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|----------------------------------------+--------+----------|
| » | Monitor type select color | JP3 | closed |
|---+------------------------------------+--------+----------|
| | Monitor type select monochrome | JP3 | open |
|---+------------------------------------+--------+----------|
| » | CMOS memory normal operation | JP6 | closed |
|---+------------------------------------+--------+----------|
| | CMOS memory clear | JP6 | open |
|---+------------------------------------+--------+----------|
| » | Factory configured - do not alter | JP14 | unknown |
|------------------------------------------------------------|
| Note: Location of JP3 is unverified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BASE MEMORY SELECT |
|------------------------------------------------------------|
| Banks | JP17,JP18,JP19,JP20,JP21 |
| | & JP22 |
|--------------------------------+---------------------------|
| Base memory : Banks 2 & 3 | pins 1 & 2 closed |
|--------------------------------+---------------------------|
| Base memory : Banks 0 & 1 | pins 2 & 3 closed |
| (Expansion memory : Banks 2 & | |
| 3) | |
|------------------------------------------------------------|
| Note: Exact arrangement & size of DIPP sockets unverified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | DIP Bank 0 | DIP Bank 1 | SIMM Bank | SIMM Bank |
| | | | 2 | 3 |
|--------+-------------+-------------+-----------+-----------|
| 512KB | (4) 44256 & | NONE | NONE | NONE |
| | | | | |
| | (2) 41256 | | | |
|--------+-------------+-------------+-----------+-----------|
| 1MB | (4) 44256 & | (4) 44256 & | NONE | NONE |
| | | | | |
| | (2) 41256 | (2) 41256 | | |
|--------+-------------+-------------+-----------+-----------|
| 2MB | (4) 44256 & | (4) 44256 & | (2) 256K | (2) 256K |
| | | | x 9 | x 9 |
| | (2) 41256 | (2) 41256 | | |
|--------+-------------+-------------+-----------+-----------|
| 3MB | (4) 44256 & | (4) 44256 & | (2) 1M x | NONE |
| | | | 9 | |
| | (2) 41256 | (2) 41256 | | |
|--------+-------------+-------------+-----------+-----------|
| 5MB | (4) 44256 & | (4) 44256 & | (2) 1M x | (2) 1M x |
| | | | 9 | 9 |
| | (2) 41256 | (2) 41256 | | |
|------------------------------------------------------------|
| Note: This table for use when banks 0 & 1 are used for |
| base memory and banks 2 & 3 are used for expansion memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|---------+----------+----------+----------------+-----------|
| 512KB | NONE | NONE | (2) 256K x 9 | NONE |
|---------+----------+----------+----------------+-----------|
| 1MB | NONE | NONE | (2) 256K x 9 | (2) 256K |
| | | | | x 9 |
|---------+----------+----------+----------------+-----------|
| 2MB | NONE | NONE | (2) 1M x 9 | NONE |
|---------+----------+----------+----------------+-----------|
| 2.5MB | NONE | NONE | (2) 256K x 9 | (2) 1M x |
| | | | | 9 |
|---------+----------+----------+----------------+-----------|
| 4MB | NONE | NONE | (2) 1M x 9 | (2) 1M x |
| | | | | 9 |
|------------------------------------------------------------|
| Note: This table for use when banks 2 & 3 are used for |
| base memory only. |
+------------------------------------------------------------+