TEXT View Source
# UNIDENTIFIED
LX400/P VESA LOCAL BUS
Processor 80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed 20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set SIS
Max. Onboard DRAM 32MB
SRAM Cache 64/128/256KB
BIOS AMI
Dimensions 254mm x 218mm
I/O Options 32-bit VESA card slot (2)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+----------+----------------------+----------|
| Turbo LED | J3 | Reset switch | J6 |
|---------------+----------+----------------------+----------|
| Turbo switch | J4 | Power LED & keylock | J7 |
|---------------+----------+----------------------+----------|
| Speaker | J5 | 32-bit VESA card (2) | S1 & S2 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Factory configured - do not | JP1 | closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | JP2 | closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | JP2 | open |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP9 | unknown |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Power good signal detect from | JP14 | pins 1 & 2 |
| | power supply | | closed |
|---+----------------------------------+--------+------------|
| | Power good signal detect from | JP14 | pins 2 & 3 |
| | board | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP15 | unknown |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP16 | unknown |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP24 | unknown |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP25 | unknown |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | VESA bus wait states select 0 | JP26 | open |
|---+----------------------------------+--------+------------|
| | VESA bus wait state select 1 | JP26 | open |
|---+----------------------------------+--------+------------|
| » | CPU speed select £ 33MHz | JP27 | closed |
|---+----------------------------------+--------+------------|
| | CPU speed select > 33MHz | JP27 | closed |
|------------------------------------------------------------|
| Note: The locations of JP1 and JP16 are unknown. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 20MB | (4) 4M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP10 | JP11 | JP12 | JP13 |
|------------+--------------+----------+----------+----------|
| 66MHz | pins 1 & 2 | pins 2 & | pins 1 & | pins 1 & |
| (internal) | closed | 3 closed | 2 closed | 2 closed |
|------------+--------------+----------+----------+----------|
| 50MHz | pins 1 & 2 | pins 1 & | pins 1 & | pins 1 & |
| | closed | 2 closed | 2 closed | 2 closed |
|------------+--------------+----------+----------+----------|
| 50MHz | pins 2 & 3 | pins 2 & | pins 1 & | pins 1 & |
| (internal) | closed | 3 closed | 2 closed | 2 closed |
|------------+--------------+----------+----------+----------|
| 33MHz | pins 1 & 2 | pins 2 & | pins 1 & | pins 1 & |
| | closed | 3 closed | 2 closed | 2 closed |
|------------+--------------+----------+----------+----------|
| 25MHz | pins 2 & 3 | pins 2 & | pins 1 & | pins 1 & |
| | closed | 3 closed | 2 closed | 2 closed |
|------------+--------------+----------+----------+----------|
| 20MHz | pins 2 & 3 | pins 2 & | pins 2 & | pins 2 & |
| | closed | 3 closed | 3 closed | 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU JUMPER CONFIGURATION |
|------------------------------------------------------------|
| CPU | JP6 | JP7 | JP8 |
|----------+---------+-------------------+-------------------|
| 80486DX | closed | pins 1 & 2 closed | pins 1 & 2 closed |
|----------+---------+-------------------+-------------------|
| 80487SX | closed | pins 2 & 3 closed | pins 1 & 2 closed |
|----------+---------+-------------------+-------------------|
| 80486SX | open | open | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Jumper | 64KB | 128KB | 256KB |
|--------+-----------------+----------------+----------------|
| SR1 | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
|--------+-----------------+----------------+----------------|
| SR2 | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
|--------+-----------------+----------------+----------------|
| SR3 | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed |
|--------+-----------------+----------------+----------------|
| SR4 | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed |
|--------+-----------------+----------------+----------------|
| SR5 | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed |
|--------+-----------------+----------------+----------------|
| SR6 | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Cache SRAM | Location | TAG |
|------------+---------------+---------------+---------------|
| 64KB | (8) 8K x 8 | Banks 0 & 1 | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 128KB | (4) 32K x 8 | Bank 0 | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (8) 32K x 8 | Banks 0 & 1 | (1) 32K x 8 |
+------------------------------------------------------------+