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# COMPUTREND SYSTEMS, INC.
CONTAQ-386 (MS-3124)
Processor AM386DX/C & T
386DX/80386DX/80486SX/80487SX/80486DX
Processor 16/20/25/33/40/50MHz
Speed
Chip Set Unidentified
Max. Onboard 32MB
DRAM
Cache 64/128/256KB
BIOS Unidentified
Dimensions 280mm x 225mm
I/O Options None
NPU Options 80387DX/3167
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------+------------+--------------------+-----------|
| Reset switch | J5 pins 1 | Power LED & | J5 pins |
| | & 2 | keylock | 16 - 20 |
|--------------+------------+--------------------+-----------|
| Turbo switch | J5 pins 4 | External battery | JP2 |
| | - 6 | | |
|--------------+------------+--------------------+-----------|
| Turbo LED | J5 pins 8 | Auxiliary keyboard | JP7 |
| | & 9 | connector | |
|--------------+------------+--------------------+-----------|
| Speaker | J5 pins 11 | | |
| | - 14 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+---------+-----------|
| ยป | Monitor type select color | JP1 | Closed |
|---+----------------------------------+---------+-----------|
| | Monitor type select monochrome | JP1 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
|------------------+--------------------+--------------------|
| 5MB | (4) 256K x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 17MB | (4) 4M x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 20MB | (4) 4M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | T 0 | T 1 |
|--------+-------------+------------+------------+-----------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 | (1) 16K x |
| | | | | 4 |
|--------+-------------+------------+------------+-----------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 | (1) 16K x |
| | | | | 4 |
|--------+-------------+------------+------------+-----------|
| 256KB | (4) 32K x 8 | (4) 32K x | (1) 32K x | (1) 16K x |
| | | 8 | 8 | 4 |
|------------------------------------------------------------|
| Note: 128KB is not available when the 80486 board is |
| installed. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | J4A | J4B | J4C |
|------------+---------------+---------------+---------------|
| 64KB | Installed | Not installed | Not installed |
|------------+---------------+---------------+---------------|
| 128KB | Not installed | Installed | Not installed |
|------------+---------------+---------------+---------------|
| 256KB | Not installed | Not installed | Installed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | J3A | J3B | J6A | J6B |JP5 | JP8 |
|------+----------+---------+---------+---------+----+-------|
|80386 |Installed | Not |Installed| Not |2 & | Open |
| | |installed| |installed| 3 | |
|------+----------+---------+---------+---------+----+-------|
|80486 | Not |Installed| Not |Installed|1 & |Closed |
| |installed | |installed| | 2 | |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
|80486 is located on external card. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU BUS CLOCK CONFIGURATION |
|------------------------------------------------------------|
| CPU | CLK | JP3 | JP4 | JP6 |
|---------+----------+---------+---------+-------------------|
| 80386 | CLK2/10 | Open | Open | pins 1 & 2 closed |
|---------+----------+---------+---------+-------------------|
| 80386 | CLK2/8 | Closed | Open | pins 1 & 2 closed |
|---------+----------+---------+---------+-------------------|
| 80386 | CLK2/6 | Open | Closed | pins 1 & 2 closed |
|---------+----------+---------+---------+-------------------|
| 80386 | CLK2/4 | Closed | Closed | pins 1 & 2 closed |
|---------+----------+---------+---------+-------------------|
| 80386 | 7.2MHz | Open | Open | pins 2 & 3 closed |
|---------+----------+---------+---------+-------------------|
| 80486 | CLK2/4 | Closed | Open | pins 1 & 2 closed |
|---------+----------+---------+---------+-------------------|
| 80486 | CLK2/3 | Open | Closed | pins 1 & 2 closed |
|---------+----------+---------+---------+-------------------|
| 80486 | CLK2/6 | Closed | Closed | pins 1 & 2 closed |
|---------+----------+---------+---------+-------------------|
| 80486 | 7.2MHz | Open | Open | pins 2 & 3 closed |
+------------------------------------------------------------+