TEXT View Source
# FREE COMPUTER TECHNOLOGY, INC.
80486VESA
Processor 80486SX/80487SX/80486SX2/80486DX
ODP486/80486DX2/Pentium Overdrive
Processor Speed 20/25/33/40/50(internal)/66(internal)MHz
Chip Set SiS
Max. Onboard DRAM 32MB
Cache 64/128/256KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options 32-bit VESA local bus slots (3)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| External battery | JP1 | Reset switch | JP17 |
|-------------------+----------+------------------+----------|
| Peripheral power | JP2 & | Turbo LED | JP18 |
| save | JP3 | | |
|-------------------+----------+------------------+----------|
| Speaker | JP15 | Turbo switch | JP19 |
|-------------------+----------+------------------+----------|
| Power LED & | JP16 | 32-bit VESA | SL1, |
| keylock | | Local bus slots | SL2,SL3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|-----------------------------+----------+-------------------|
| ยป | CMOS normal operation | JP21 | pins 2 & 3 closed |
|---+-------------------------+----------+-------------------|
| | CMOS memory clear | JP21 | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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) 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 |
|------------------------------------------------------------|
| CPU Type | JP7 | JP8 |
|-------------------+--------------------+-------------------|
| 80486SX | pins 2 & 3 closed | Open |
|-------------------+--------------------+-------------------|
| 80487SX | pins 1 & 2, 3 & 4 | pins 2 & 3 closed |
| | closed | |
|-------------------+--------------------+-------------------|
| 80486SX2 | pins 1 & 2, 3 & 4 | pins 2 & 3 closed |
| | closed | |
|-------------------+--------------------+-------------------|
| 80486DX | pins 1 & 2, 3 & 4 | pins 1 & 2 closed |
| | closed | |
|-------------------+--------------------+-------------------|
| 80486DX2 | pins 1 & 2, 3 & 4 | pins 1 & 2 closed |
| | closed | |
|-------------------+--------------------+-------------------|
| ODP486 (168-pin) | pins 1 & 2, 3 & 4 | pins 1 & 2 closed |
| | closed | |
|-------------------+--------------------+-------------------|
| ODP486 (169-pin) | pins 1 & 2, 3 & 4 | pins 2 & 3 closed |
| | closed | |
|-------------------+--------------------+-------------------|
| Pentium Overdrive | pins 1 & 2, 3 & 4 | pins 2 & 3 closed |
| | closed | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU CLOCK CONFIGURATION |
|------------------------------------------------------------|
| CPU Clock | JP4 | JP5 | JP6 |
|---------------+--------------+--------------+--------------|
| 20MHz | Closed | Closed | Open |
|---------------+--------------+--------------+--------------|
| 25MHz | Closed | Open | Closed |
|---------------+--------------+--------------+--------------|
| 33MHz | Open | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 40MHz | Closed | Open | Open |
|---------------+--------------+--------------+--------------|
| 50MHz | Open | Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA WAIT STATE/BUS SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | Wait states | JP13 | JP14 |
|---------------+---------------+--------------+-------------|
| <= 33MHz | 0 wait states | Open | Open |
|---------------+---------------+--------------+-------------|
| > 33MHz | 1 wait state | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MISCELLANEOUS TECHNICAL NOTE |
|------------------------------------------------------------|
| Note: JP2 & JP3 are used for an optional peripheral card |
| timed power shut-down that is set up in CMOS. |
+------------------------------------------------------------+