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# GENOA SYSTEMS CORPORATION
TURBOEXPRESS 486VL
Processor 80486SX/80487SX/80486DX/ODP486SX/80486DX2/80486DX3/
Pentium Overdrive
Processor 20/25/33/40/50(internal)/50/66(internal)/99(internal)MHz
Speed
Chip Set SIS
Max. 32MB
Onboard
DRAM
Cache 64/128/256KB
BIOS AMI
Dimensions 330mm x 218mm
I/O 32-bit VESA local bus slots (3)
Options
NPU None
Options
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| External battery | JP1 | Turbo switch | JP19 |
|------------------+----------+-------------------+----------|
| Speaker | JP15 | 32-bit VESA Local | S1 |
| | | bus slot | |
|------------------+----------+-------------------+----------|
| Power LED & | JP16 | 32-bit VESA Local | S2 |
| keylock | | bus slot | |
|------------------+----------+-------------------+----------|
| Reset switch | JP17 | 32-bit VESA Local | S3 |
| | | bus slot | |
|------------------+----------+-------------------+----------|
| Turbo LED | JP18 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|---------------------------------------+---------+----------|
| » | Factory configured - do not alter | JP2 | N/A |
|---+-----------------------------------+---------+----------|
| » | Factory configured - do not alter | JP3 | N/A |
|---+-----------------------------------+---------+----------|
| » | Factory configured - do not alter | JP21 | N/A |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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) 1M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|-------+-------------+-------------+------------------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 |
|-------+-------------+-------------+------------------------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 |
|-------+-------------+-------------+------------------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 16K x 8/(1) 32K x |
| | | | 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP11 | JP12 |
|-------------------+--------------------+-------------------|
| 64KB | Open | Open |
|-------------------+--------------------+-------------------|
| 128KB | pins 1 & 2 closed | Closed |
|-------------------+--------------------+-------------------|
| 256KB | pins 2 & 3 closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP7 | JP8 |
|--------------------+-------------------+-------------------|
| 80486SX | pins 2 & 3 closed | Open |
|--------------------+-------------------+-------------------|
| 80487SX | pins 1 & 2 and 3 | pins 2 & 3 closed |
| | & 4 closed | |
|--------------------+-------------------+-------------------|
| 80486DX | pins 1 & 2 and 3 | pins 1 & 2 closed |
| | & 4 closed | |
|--------------------+-------------------+-------------------|
| ODP486SX (168 pin) | pins 1 & 2 and 3 | pins 1 & 2 closed |
| | & 4 closed | |
|--------------------+-------------------+-------------------|
| ODP486SX (169 pin) | pins 1 & 2 and 3 | pins 2 & 3 closed |
| | & 4 closed | |
|--------------------+-------------------+-------------------|
| ODP486SX2 | pins 1 & 2 and 3 | pins 2 & 3 closed |
| | & 4 closed | |
|--------------------+-------------------+-------------------|
| 80486DX2 | pins 1 & 2 and 3 | pins 1 & 2 closed |
| | & 4 closed | |
|--------------------+-------------------+-------------------|
| 80486DX3 | pins 1 & 2 and 3 | pins 1 & 2 closed |
| | & 4 closed | |
|--------------------+-------------------+-------------------|
| Pentium Overdrive | pins 1 & 2 and 3 | pins 2 & 3 closed |
| | & 4 closed | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP4 | JP5 | JP6 |
|---------------+--------------+--------------+--------------|
| 20MHz | Closed | Closed | Open |
|---------------+--------------+--------------+--------------|
| 25MHz | Closed | Open | Closed |
|---------------+--------------+--------------+--------------|
| 33MHz | Open | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 40MHz | Closed | Open | Open |
|---------------+--------------+--------------+--------------|
| 50i MHz | Closed | Open | Closed |
|---------------+--------------+--------------+--------------|
| 50MHz | Open | Closed | Open |
|---------------+--------------+--------------+--------------|
| 66i MHz | Open | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 99i MHz | Open | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA WAIT STATE/BUS SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU Speed | Wait states | JP13 | JP14 |
|---------------+---------------+--------------+-------------|
| £ 33MHz | 0 wait states | Open | Open |
|---------------+---------------+--------------+-------------|
| > 33MHz | 1 wait state | Closed | Closed |
+------------------------------------------------------------+