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# JETPRO INFOTECH COMPANY, LTD.
MB-60 EISA486/33/50
Processor 80486DX/80486DX2
Processor Speed 33/50(internal)/50/66(internal)MHz
Chip Set OPTI
Max. Onboard DRAM 128MB
SRAM Cache 64/128/256
BIOS AMI
Dimensions 330.2mm x 218.4mm
I/O Options None
NPU Options 4167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| Power LED & keylock | J1 | Turbo LED | J4 |
|---------------------+----------+----------------+----------|
| Speaker | J2 | Reset switch | J5 |
|---------------------+----------+----------------+----------|
| Turbo switch | J3 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Power good signal detect from | JP2 | pins 1 & 2 |
| | board | | closed |
|---+----------------------------------+--------+------------|
| | Power good signal detect from | JP2 | pins 2 & 3 |
| | power supply | | closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | JP3 | closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | JP3 | open |
|---+----------------------------------+--------+------------|
| | ATCLK select iOSC/1 | JP6 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | ATCLK select iOSC/2 | JP6 | pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|----------------+---------------------+---------------------|
| 4MB | (4) 1M x 9 | NONE |
|----------------+---------------------+---------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|----------------+---------------------+---------------------|
| 16MB | (4) 4M x 9 | NONE |
|----------------+---------------------+---------------------|
| 20MB | (4) 1M x 9 | (4) 4M x 9 |
|----------------+---------------------+---------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
|----------------+---------------------+---------------------|
| 64MB | (4) 16M x 9 | NONE |
|----------------+---------------------+---------------------|
| 128MB | (4) 16M x 9 | (4) 16M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Jumper | 64KB | 128KB | 256KB |
|--------+-----------------+----------------+----------------|
| JP7 | open | open | closed |
|--------+-----------------+----------------+----------------|
| JP8 | open | open | closed |
|--------+-----------------+----------------+----------------|
| JP9 | open | closed | closed |
|--------+-----------------+----------------+----------------|
| JP10 | open | closed | closed |
|--------+-----------------+----------------+----------------|
| JP11 | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Cache SRAM | Location |
|-----------------+---------------------+--------------------|
| 64KB | (8) 8K x 8 | Banks 0 & 1 |
|-----------------+---------------------+--------------------|
| 128KB | (4) 32K x 8 | Bank 0 |
|-----------------+---------------------+--------------------|
| 256KB | (8) 32K x 8 | Banks 0 & 1 |
|------------------------------------------------------------|
| Note:The TAG memory does not need to be changed when |
| upgrading. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU JUMPER CONFIGURATION |
|------------------------------------------------------------|
| CPU | JP4 | JP5 |
|--------------------+-------------------+-------------------|
| 80486DX2/66 | closed | open |
|--------------------+-------------------+-------------------|
| 80486DX/50 | closed | closed |
|--------------------+-------------------+-------------------|
| 80486DX2/50 | open | open |
|--------------------+-------------------+-------------------|
| 80486DX/40 | open | closed |
|--------------------+-------------------+-------------------|
| 80486DX/33 | closed | open |
+------------------------------------------------------------+