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# YOUNG MICRO SYTEMS, INC.
VEGA 486F-2VL
Processor 80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed 16/20/25/33/50(internal)/50/66(internal)MHz
Chip Set Symphony
Max. Onboard DRAM 64MB
Cache 64/256/1024KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options 32-bit VESA local bus slots (2)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------+----------+------------------------+----------|
| Speaker | J1 | Turbo LED | J4 |
|-------------+----------+------------------------+----------|
| Power LED & | J2 | Turbo switch | J5 |
| keylock | | | |
|-------------+----------+------------------------+----------|
| Reset | J3 | 32-bit VESA local bus | S1 & S2 |
| | | slots | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | VESA I/O wait states select zero | JP5 | Open |
|---+----------------------------------+--------+------------|
| | VESA I/O wait states select one | JP5 | Open |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP6 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | VESA timing select T3 speed 16 - | JP7 | Closed |
| | 33MHz) | | |
|---+----------------------------------+--------+------------|
| | VESA timing select T3 (speed | JP7 | Open |
| | 50MHz) | | |
|---+----------------------------------+--------+------------|
| » | I/O wait states select zero | JP10 | Closed |
|---+----------------------------------+--------+------------|
| | I/O wait states select one | JP10 | Open |
|---+----------------------------------+--------+------------|
| » | Phase select X2 1 | JP11 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Phase select X1 1 | JP11 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Phase select X2 1 | JP12 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Phase select X1 1 | JP12 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Phase select X2 1 | JP18 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Phase select X1 1 | JP18 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Phase select X2 1 | JP19 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Phase select X1 1 | JP19 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP13 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP14 | Closed |
| | alter | | |
|------------------------------------------------------------|
| Note: 1 Phase X1 is only used when an 80486DX2-50 CPU is |
| installed. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
|------------------+--------------------+--------------------|
| 5MB | (4) 1M x 9 | NONE |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 17MB | (4) 256K x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 20MB | (4) 1M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 64MB | (4) 16M x 9 | NONE |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 |
|----------------------------+-------------------------------|
| 64KB | (8) 8K x 8 |
|----------------------------+-------------------------------|
| 256KB | (8) 32K x 8 |
|----------------------------+-------------------------------|
| 1MB | (8) 128K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP20 | JP21 | JP27 | JP28 | JP29 |
|----------+----------+----------+---------+--------+--------|
| 64KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
|----------+----------+----------+---------+--------+--------|
| 256KB | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 | 2 & 3 |
|----------+----------+----------+---------+--------+--------|
| 1MB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|------------------------------------------------------------|
| Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP15 | JP16 | JP17 |
|-----------+--------+-------------------+-------------------|
| 80486SX | Closed | pins 1 & 2 closed | pins 2 & 3 closed |
|-----------+--------+-------------------+-------------------|
| ODP486SX | Closed | pins 1 & 2 closed | pins 2 & 3 closed |
|-----------+--------+-------------------+-------------------|
| 80487SX | Open | Closed | Open |
|-----------+--------+-------------------+-------------------|
| 80486DX | Closed | pins 1 & 2 closed | pins 1 & 2 closed |
|-----------+--------+-------------------+-------------------|
| 80486DX2 | Closed | pins 1 & 2 closed | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP3 | JP4 | JP8 | JP9 |
|-------------+-------------------+--------+--------+--------|
| 16/20/25MHz | Open | Open | Open | Open |
|-------------+-------------------+--------+--------+--------|
| 33MHz | pins 1 & 2 closed | Open | Open | Open |
|-------------+-------------------+--------+--------+--------|
| 50MHz | pins 2 & 3 closed | Closed | Closed | Closed |
+------------------------------------------------------------+