TEXT View Source
# TEXAS MICRO SYSTEMS, INC.
E486C
Processor 80486DX/80486DX2/80486DX4
Processor 25/33/50(internal)/50/66(internal)/100(internal)MHz
Speed
Chip Set Unidentified
Video Chip None
Set
Maximum 64MB
Onboard
Memory
Maximum None
Video
Memory
Cache 256KB
BIOS Unidentified
Dimensions 355mm x 304mm
I/O Auxiliary bus slots (6), CPU slot, floppy drive
Options interface, IDE interface, parallel port, PS/2 mouse
port, serial ports (2)
NPU None
Options
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Serial port 2 | J1 | PS/2 mouse port | J5 |
|-------------------+----------+------------------+----------|
| IDE interface | J2 | Parallel port | J9 |
|-------------------+----------+------------------+----------|
| Serial port 1 | J3 | IDE interface | JP4 |
| | | LED | |
|-------------------+----------+------------------+----------|
| Floppy drive | J4 | | |
| interface | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | Factory configured - do not | JP6 | Pins 1 & 2, |
| | alter | | 3 & 4 closed |
|---+---------------------------------+-------+--------------|
| » | Counter timing select free | JP9 | Pins 2 & 3 |
| | running | | closed |
|---+---------------------------------+-------+--------------|
| | Counter timing select CPU | JP9 | Pins 1 & 2 |
| | heartbeat (ADS) | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP11 | Pins 2 & 3 |
| | alter | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP12 | Pins 2 & 3 |
| | alter | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP14 | Open |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | PS/2 mouse IRQ 12 unbuffered | JP15 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | PS/2 mouse IRQ 12 buffered | JP15 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Monitor type select color | SW1/1 | On |
|---+---------------------------------+-------+--------------|
| | Monitor type select monochrome | SW1/1 | Off |
|---+---------------------------------+-------+--------------|
| » | Flash BIOS enabled | SW1/2 | Off |
|---+---------------------------------+-------+--------------|
| | Flash BIOS disabled | SW1/2 | On |
|---+---------------------------------+-------+--------------|
| » | CMOS memory normal operation | SW1/3 | Off |
|---+---------------------------------+-------+--------------|
| | CMOS memory clear | SW1/3 | On |
|---+---------------------------------+-------+--------------|
| | I/O address select 270 | SW1/4 | Off |
|---+---------------------------------+-------+--------------|
| | I/O address select 370 | SW1/4 | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 1MB | (1) 256K x | None | None | None |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 2MB | (1) 256K x | (1) 256K x | None | None |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 3MB | (1) 256K x | (1) 256K x | (1) 256K x | None |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 256K x | (1) 256K x | (1) 256K x | (1) 256K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 1M x 36 | None | None | None |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 1M x 36 | (1) 1M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 4M x 36 | None | None | None |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Note: 256KB cache is factory installed and is not |
| configurable. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JP5 |
|----------------------------+-------------------------------|
| 25MHz | Pins 5 & 6, 7 & 8 closed |
|----------------------------+-------------------------------|
| 33MHz | Pins 5 & 6 closed |
|----------------------------+-------------------------------|
| 50iMHz | Pins 5 & 6, 7 & 8 closed |
|----------------------------+-------------------------------|
| 50MHz | Pins 1 & 2, 5 & 6 closed |
|----------------------------+-------------------------------|
| 66iMHz | Pins 5 & 6 closed |
|----------------------------+-------------------------------|
| 100iMHz | Pins 5 & 6 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP17 |
|----------------------------+-------------------------------|
| 80486DX | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 80486DX2 | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 80486DX4 | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU MULTIPLIER SELECTION |
|------------------------------------------------------------|
| Multiplier | JP18 |
|----------------------------+-------------------------------|
| 2x | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 3x | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 2 SELECTION |
|------------------------------------------------------------|
| Setting | JP1 | JP2 | JP3 |
|------------+---------------+---------------+---------------|
| » | RS-232 | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 |
| | | closed | closed | closed |
|---+--------+---------------+---------------+---------------|
| | RS-422 | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | | closed | closed | closed |
|---+--------+---------------+---------------+---------------|
| | RS-485 | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BUS CLOCK BUFFER SELECTION |
|------------------------------------------------------------|
| Setting | JP7 | JP16 |
|------------------+--------------------+--------------------|
| Unbuffered | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| Buffered | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
IMG IMG 2
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+----------+----------------------+----------|
| DC power | J20 | Front keyboard | JP15 |
| | | connector | |
|---------------+----------+----------------------+----------|
| DC power | J21 | CPU slot | SL1 |
|---------------+----------+----------------------+----------|
| Rear keyboard | JP14 | Auxiliary bus slots | SL2 – |
| connector | | | SL6 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-----------------------------------+-------+----------------|
| » | Slot 7 card type select EISA | JP1 | Pins 2 & 3 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| | Slot 7 card type select ISA | JP1 | Pins 1 & 2 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| » | Slot 5 card type select EISA | JP2 | Pins 2 & 3 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| | Slot 5 card type select ISA | JP2 | Pins 1 & 2 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| » | Slot 3 card type select EISA | JP3 | Pins 2 & 3 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| | Slot 3 card type select ISA | JP3 | Pins 1 & 2 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| » | Slot 1 card type select EISA | JP4 | Pins 2 & 3 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| | Slot 1 card type select ISA | JP4 | Pins 1 & 2 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| » | Slot 9 card type select EISA | JP5 | Pins 2 & 3 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| | Slot 9 card type select ISA | JP5 | Pins 1 & 2 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| » | Slot 11 card type select EISA | JP6 | Pins 2 & 3 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| | Slot 11 card type select ISA | JP6 | Pins 1 & 2 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| » | Slot 13 card type select EISA | JP7 | Pins 2 & 3 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| | Slot 13 card type select ISA | JP7 | Pins 1 & 2 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| » | Slot 6 card type select EISA | JP8 | Pins 2 & 3 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| | Slot 6 card type select ISA | JP8 | Pins 1 & 2 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| » | Slot 4 card type select EISA | JP9 | Pins 2 & 3 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| | Slot 4 card type select ISA | JP9 | Pins 1 & 2 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| » | Slot 2 card type select EISA | JP10 | Pins 2 & 3 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| | Slot 2 card type select ISA | JP10 | Pins 1 & 2 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| » | Slot 8 card type select EISA | JP11 | Pins 2 & 3 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| | Slot 8 card type select ISA | JP11 | Pins 1 & 2 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| » | Slot 10 card type select EISA | JP12 | Pins 2 & 3 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| | Slot 10 card type select ISA | JP12 | Pins 1 & 2 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| » | Slot 12 card type select EISA | JP13 | Pins 2 & 3 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| | Slot 12 card type select ISA | JP13 | Pins 1 & 2 |
| | | | closed |
|------------------------------------------------------------|
| Note: Slot 1 is located at the top of the diagram. |
+------------------------------------------------------------+