TEXT View Source
# AT & T
MODEL 6386SX/EL20 (FM-0589-09)
Processor 80386SX (exact location unidentified)
Processor Speed 20MHz
Chip Set Unidentified
Video Chip Set None
Maximum Onboard 32MB
Memory
Maximum Video None
Memory
Cache 16/32/64KB
BIOS Unidentified
Dimensions 330mm x 218mm
I/O Options Floppy drive interface, IDE interface,
parallel port, PS/2 mouse port, serial ports
(2), VGA feature connector, VGA port, riser
slot
NPU Options 80387SX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| VGA feature | CN1 | VGA port | CN6 |
| connector | | | |
|------------------+----------+-------------------+----------|
| PS/2 mouse port | CN2 | Floppy drive | CN7 |
| | | interface | |
|------------------+----------+-------------------+----------|
| Serial port | CN3 | IDE interface | CN8 |
|------------------+----------+-------------------+----------|
| Serial port | CN4 | Riser slot | SL1 |
|------------------+----------+-------------------+----------|
| Parallel port | CN5 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|---------------------------------------+-------+------------|
| » | 16-bit video BIOS enabled | SW1/3 | Off |
|---+-----------------------------------+-------+------------|
| | 8-bit video BIOS enabled | SW1/3 | On |
|---+-----------------------------------+-------+------------|
| » | 16-bit video buffer enabled | SW1/4 | Off |
|---+-----------------------------------+-------+------------|
| | 8-bit video buffer enabled | SW1/4 | On |
|---+-----------------------------------+-------+------------|
| » | 1024 x 768 interlaced enabled | SW1/5 | On |
|---+-----------------------------------+-------+------------|
| | 1024 x 768 non interlaced enabled | SW1/5 | Off |
|---+-----------------------------------+-------+------------|
| » | On board video enabled | SW1/8 | On |
|---+-----------------------------------+-------+------------|
| | On board video disabled | SW1/8 | Off |
|---+-----------------------------------+-------+------------|
| » | Password normal operation | W1 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Password clear | W1 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | W2 | Open |
|---+-----------------------------------+-------+------------|
| » | Monitor type select color | W3 | Closed |
|---+-----------------------------------+-------+------------|
| | Monitor type select monochrome | W3 | Open |
|---+-----------------------------------+-------+------------|
| » | Parallel port unidirectional | W4 | Closed |
|---+-----------------------------------+-------+------------|
| | Parallel port bidirectional | W4 | Open |
|---+-----------------------------------+-------+------------|
| » | PS/2 mouse IRQ12 enabled | W5 | Closed |
|---+-----------------------------------+-------+------------|
| | PS/2 mouse IRQ12 disabled | W5 | Open |
|---+-----------------------------------+-------+------------|
| » | Non volatile RAM normal operation | W7 | Open |
|---+-----------------------------------+-------+------------|
| | Non volatile RAM clear | W7 | Closed |
|---+-----------------------------------+-------+------------|
| » | Speaker type select onboard | W10 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Speaker type select offboard | W10 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| » | IDE interface LED enabled | W11 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | IDE interface LED disabled | W11 | Pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 1MB | (2) 256K x | (2) 256K x | None | None |
| | 9 | 9 | | |
|-------+-------------+------------+------------+------------|
| 1.5MB | (2) 256K x | (2) 256K x | (2) 256K x | None |
| | 9 | 9 | 9 | |
|-------+-------------+------------+------------+------------|
| 2MB | (2) 256K x | (2) 256K x | (2) 256K x | (2) 256K x |
| | 9 | 9 | 9 | 9 |
|-------+-------------+------------+------------+------------|
| 2MB | (2) 1M x 9 | None | None | None |
|-------+-------------+------------+------------+------------|
| 2.5MB | (2) 1M x 9 | (2) 256K x | None | None |
| | | 9 | | |
|-------+-------------+------------+------------+------------|
| 3MB | (2) 1M x 9 | (2) 256K x | (2) 256K x | None |
| | | 9 | 9 | |
|-------+-------------+------------+------------+------------|
| 3.5MB | (2) 1M x 9 | (2) 256K x | (2) 256K x | (2) 256K x |
| | | 9 | 9 | 9 |
|-------+-------------+------------+------------+------------|
| 4MB | (2) 1M x 9 | (2) 1M x 9 | None | None |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|--------+------------+------------+------------+------------|
| 4.5MB | (2) 1M x 9 | (2) 1M x 9 | (2) 256K x | None |
| | | | 9 | |
|--------+------------+------------+------------+------------|
| 5MB | (2) 1M x 9 | (2) 1M x 9 | (2) 256K x | (2) 256K x |
| | | | 9 | 9 |
|--------+------------+------------+------------+------------|
| 6MB | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | None |
|--------+------------+------------+------------+------------|
| 6.5MB | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | (2) 256K x |
| | | | | 9 |
|--------+------------+------------+------------+------------|
| 8MB | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 |
|--------+------------+------------+------------+------------|
| 8MB | (2) 4M x 9 | None | None | None |
|--------+------------+------------+------------+------------|
| 8.5MB | (2) 4M x 9 | (2) 256K x | None | None |
| | | 9 | | |
|--------+------------+------------+------------+------------|
| 9MB | (2) 4M x 9 | (2) 256K x | (2) 256K x | None |
| | | 9 | 9 | |
|--------+------------+------------+------------+------------|
| 9.5MB | (2) 4M x 9 | (2) 256K x | (2) 256K x | (2) 256K x |
| | | 9 | 9 | 9 |
|--------+------------+------------+------------+------------|
| 10MB | (2) 4M x 9 | (2) 1M x 9 | None | None |
|--------+------------+------------+------------+------------|
| 10.5MB | (2) 4M x 9 | (2) 1M x 9 | (2) 256K x | None |
| | | | 9 | |
|--------+------------+------------+------------+------------|
| 11MB | (2) 4M x 9 | (2) 1M x 9 | (2) 256K x | (2) 256K x |
| | | | 9 | 9 |
|--------+------------+------------+------------+------------|
| 12MB | (2) 4M x 9 | (2) 1M x 9 | (2) 1M x 9 | None |
|--------+------------+------------+------------+------------|
| 12.5MB | (2) 4M x 9 | (2) 1M x 9 | (2) 1M x 9 | (2) 256K x |
| | | | | 9 |
|--------+------------+------------+------------+------------|
| 14MB | (2) 4M x 9 | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 |
|--------+------------+------------+------------+------------|
| 16MB | (2) 4M x 9 | (2) 4M x 9 | None | None |
|--------+------------+------------+------------+------------|
| 16.5MB | (2) 4M x 9 | (2) 4M x 9 | (2) 256K x | None |
| | | | 9 | |
|--------+------------+------------+------------+------------|
| 17MB | (2) 4M x 9 | (2) 4M x 9 | (2) 256K x | (2) 256K x |
| | | | 9 | 9 |
|--------+------------+------------+------------+------------|
| 18MB | (2) 4M x 9 | (2) 4M x 9 | (2) 1M x 9 | None |
|--------+------------+------------+------------+------------|
| 18.5MB | (2) 4M x 9 | (2) 4M x 9 | (2) 1M x 9 | (2) 256K x |
| | | | | 9 |
|--------+------------+------------+------------+------------|
| 20MB | (2) 4M x 9 | (2) 4M x 9 | (2) 1M x 9 | (2) 1M x 9 |
|--------+------------+------------+------------+------------|
| 32MB | (2) 4M x 9 | (2) 4M x 9 | (2) 4M x 9 | (2) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 16KB | (2) 8K x 8 | None |
|------------------+--------------------+--------------------|
| 32KB | (2) 8K x 8 | (2) 8K x 8 |
|------------------+--------------------+--------------------|
| 64KB | (2) 32K x 8 | None |
|------------------------------------------------------------|
| Note: The location of the cache is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | W9 |
|----------------------------+-------------------------------|
| 16KB | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 32KB | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 64KB | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MCLK SELECTION |
|------------------------------------------------------------|
| Type | SW1/6 | SW1/7 |
|------------------------+-----------------+-----------------|
| » | 41.612MHz | On | On |
|---+--------------------+-----------------+-----------------|
| | 36.242MHz | Off | On |
|---+--------------------+-----------------+-----------------|
| | 37.585MHz | On | Off |
|---+--------------------+-----------------+-----------------|
| | 44.744MHz | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MONITOR SELECTION |
|------------------------------------------------------------|
| Setting | SW1/1 | SW1/2 |
|------------------------+-----------------+-----------------|
| » | PS/2 VGA | Off | Off |
|---+--------------------+-----------------+-----------------|
| | MDA | On | On |
|---+--------------------+-----------------+-----------------|
| | AT VGA | Off | On |
|---+--------------------+-----------------+-----------------|
| | CGA | On | Off |
+------------------------------------------------------------+