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# MONOLITHIC SYSTEMS, INC. (COLORADO MSI)
MICROFRAME 386CT
Processor 80386DX
Processor Speed 20/25MHz
Chip Set C & T
Max. Onboard DRAMe 8MB
Cache 32KB
BIOS AMI/Phoenix
Dimensions 301mm x 350mm
I/O Options 32-bit external memory card slots (2)
NPU Options 80387/3167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+-----------+---------------------+----------|
| Reset switch | J22 | Speaker | J26 pin |
| | | | 9 |
|---------------+-----------+---------------------+----------|
| CPU ready LED | J23 | Power LED & keylock | J27 |
|---------------+-----------+---------------------+----------|
| Turbo LED | J24 | Speaker | J28 |
|---------------+-----------+---------------------+----------|
| Ready | J26 pin 2 | Auxiliary keyboard | J31 |
|---------------+-----------+---------------------+----------|
| Keylock | J26 pin 3 | Disk access LED | J32 |
|---------------+-----------+---------------------+----------|
| Turbo | J26 pin 4 | External battery | J34 |
|---------------+-----------+---------------------+----------|
| Disk | J26 pin 6 | 32-bit external | S1 & S2 |
| | | memory cards | |
|---------------+-----------+---------------------+----------|
| Reset | J26 pin 7 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Factory configured - do not | J17 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | J25 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | J25 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | CMOS memory normal operation | J36 | Open |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | J36 | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 1MB | (4) 256K x 9 | NONE |
|------------------+--------------------+--------------------|
| 2MB | (4) 256K x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 4MB | (4) 1M x 9 | NONE |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| NPU CONFIGURATION |
|------------------------------------------------------------|
| Setting | J21 | J37 |
|------------------+--------------------+--------------------|
| Disabled | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| Enabled | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+