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# YOUNG MICRO SYSTEMS, INC.
VEGA 486 GREEN PC
Processor CX486SX/AMD80486SX/80486SX/CX487DX/AMD80486DX/80486DX
80486DX2/80486DX4/Pentium Overdrive
Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set Symphony Wagner
Max. 128MB
Onboard
DRAM
Cache 64/128/256/512/1024KB
BIOS AMI/Phoenix
Dimensions 254mm x 218mm
I/O 32-bit VESA local bus slots (3), PS/2 mouse port
Options
NPU None
Options
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+----------+----------------------+----------|
| Power LED & | J1 | Turbo LED | J5 |
| keylock | | | |
|---------------+----------+----------------------+----------|
| Speaker | J2 | PS/2 mouse port | J6 |
|---------------+----------+----------------------+----------|
| Turbo switch | J3 | Power suspend | JP15 |
|---------------+----------+----------------------+----------|
| Reset switch | J4 | 32-bit VESA Local | SL1, |
| | | bus slots | SL2,SL3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Factory configured - do not | J27 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J28 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J29 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J30 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J31 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J32 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J33 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J34 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP3 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP9 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Tag RAM separated | JP16 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Tag RAM combined | JP16 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP17 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Flash BIOS write protect enabled | JP18 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Flash BIOS write protect | JP18 | pins 2 & 3 |
| | disabled | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP19 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP22 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP28 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP29 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP30 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP31 | Open |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 1MB | (1) 256K x | NONE | NONE | NONE |
| | 36 | | | |
|-------+-------------+------------+------------+------------|
| 4MB | (1) 512K x | (1) 512K x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 4MB | (1) 1M x 36 | NONE | NONE | NONE |
|-------+-------------+------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 8MB | (1) 2M x 36 | NONE | NONE | NONE |
|-------+-------------+------------+------------+------------|
| 16MB | (1) 4M x 36 | NONE | NONE | NONE |
|-------+-------------+------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 32MB | (1) 2M x 36 | (1) 2M x | (1) 2M x | (1) 2M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 8M x 36 | (1) 8M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 8M x 36 | (1) 8M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 128MB | (1) 8M x 36 | (1) 8M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG (U1) | TAG (U2) |
|-------+-------------+------------+------------+------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 | (1) 8K x 8 |
|-------+-------------+------------+------------+------------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 | (1) 8K x 8 |
|-------+-------------+------------+------------+------------|
| 256KB | (4) 32K x 8 | (4) 32K x | (1) 32K x | (1) 32K x |
| | | 8 | 8 | 8 |
|-------+-------------+------------+------------+------------|
| 512KB | (4) 128K x | NONE | (1) 32K x | (1) 32K x |
| | 8 | | 8 | 8 |
|-------+-------------+------------+------------+------------|
| 1MB | (4) 128K x | (4) 128K x | (1) 128K x | (1) 128K x |
| | 8 | 8 | 8 | 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JD1 | JD2 | JT1 | JT2 | JT3 |
|----------+----------+----------+---------+--------+--------|
| 64KB | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 |
|----------+----------+----------+---------+--------+--------|
| 128KB | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 | 1 & 2 |
|----------+----------+----------+---------+--------+--------|
| 256KB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 1 & 2 |
|----------+----------+----------+---------+--------+--------|
| 512KB | 1 & 2 | 1 & 2 | 2 & 3 | 2 & 3 | 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 (CYRIX) |
|------------------------------------------------------------|
| Type | JP1 | JP2 | JP4 | JP5 | JP6 | JP7 | JP8 |JP10|
|----------+-----+-----+-----+------+------+-----+------+----|
|486SX (1X)|Open |Open |Open |2 & 3 |Closed|1 & 2|Closed|Open|
|----------+-----+-----+-----+------+------+-----+------+----|
|486SX (2X)|Open |Open |Open |2 & 3 |Closed|1 & 2|Closed|Open|
|----------+-----+-----+-----+------+------+-----+------+----|
|487DX (1X)|Open |Open |Open |1 & 2 |Closed|1 & 2|Closed|Open|
|----------+-----+-----+-----+------+------+-----+------+----|
|487DX (2X)|Open |Open |Open |1 & 2 |Closed|1 & 2|Closed|Open|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CYRIX) |
|------------------------------------------------------------|
| Type | JP11 | JP12 | JP13 | JP23 | JP24 |JP41|JP42|
|-----------+------+-------+-------+-------+-------+----+----|
|486SX (1X) | Open | Open |Closed |Closed |Closed |Open|Open|
|-----------+------+-------+-------+-------+-------+----+----|
|486SX (2X) | Open |Closed |Closed |Closed |Closed |Open|Open|
|-----------+------+-------+-------+-------+-------+----+----|
|487DX (1X) |1 & 2 | Open |Closed |Closed |Closed |Open|Open|
|-----------+------+-------+-------+-------+-------+----+----|
|487DX (2X) |1 & 2 |Closed |Closed |Closed |Closed |Open|Open|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (AMD) |
|------------------------------------------------------------|
| Type | JP1 | JP2 | JP4 | JP5 | JP6 |JP7 |JP8 |JP10|
|----------+------+------+------+------+------+----+----+----|
|486SX (WT)| Open |Closed| Open |2 & 3 |Closed|Open|Open|Open|
|----------+------+------+------+------+------+----+----+----|
|486SX (WB)|Closed|Closed|Closed|2 & 3 |Closed|Open|Open|Open|
|----------+------+------+------+------+------+----+----+----|
|486DX (WT)| Open |Closed| Open |2 & 3 |Closed|Open|Open|Open|
|----------+------+------+------+------+------+----+----+----|
|486DX (WB)|Closed|Closed|Closed|2 & 3 |Closed|Open|Open|Open|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (AMD) |
|------------------------------------------------------------|
| Type | JP11 | JP12 | JP13 | JP23 | JP24 | JP41 | JP42 |
|--------+-------+------+------+------+------+-------+-------|
| 486SX | Open | Open | Open | Open | Open | 2 & 3 | 2 & 3 |
| (WT) | | | | | | | |
|--------+-------+------+------+------+------+-------+-------|
| 486SX | Open | Open | Open | Open | Open | 2 & 3 | 2 & 3 |
| (WB) | | | | | | | |
|--------+-------+------+------+------+------+-------+-------|
| 486DX | 1 & 2 | Open | Open | Open | Open | 2 & 3 | 2 & 3 |
| (WT) | | | | | | | |
|--------+-------+------+------+------+------+-------+-------|
| 486DX | 1 & 2 | Open | Open | Open | Open | 2 & 3 | 2 & 3 |
| (WB) | | | | | | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (INTEL 486) |
|------------------------------------------------------------|
| Type | JP1 | JP2 | JP4 | JP5 | JP6 | JP7 |JP8 |JP10|
|-----------+-----+------+-----+------+------+-----+----+----|
| 486SX |Open | Open |Open |2 & 3 |Closed|Open |Open|Open|
|-----------+-----+------+-----+------+------+-----+----+----|
| 486SL |Open |Closed|Open |1 & 2 |Closed|Open |Open|Open|
|-----------+-----+------+-----+------+------+-----+----+----|
| 486DX/DX2 |Open | Open |Open |1 & 2 |Closed|Open |Open|Open|
|-----------+-----+------+-----+------+------+-----+----+----|
|486DX4 (2X)|Open |Closed|Open |1 & 2 |Closed|Open |Open|Open|
|-----------+-----+------+-----+------+------+-----+----+----|
|486DX4 (3X)|Open |Closed|Open |1 & 2 |Closed|Open |Open|Open|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (INTEL 486) |
|------------------------------------------------------------|
| Type | JP11 | JP12 | JP13 | JP23 | JP24 |JP41 |JP42|
|------------+------+------+------+-------+-------+-----+----|
| 486SX | Open | Open | Open |Closed |Closed |Open |Open|
|------------+------+------+------+-------+-------+-----+----|
| 486SL |1 & 2 | Open | Open | Open | Open |Open |Open|
|------------+------+------+------+-------+-------+-----+----|
| 486DX/DX2 |1 & 2 | Open | Open |Closed |Closed |Open |Open|
|------------+------+------+------+-------+-------+-----+----|
|486DX4 (2X) |2 & 3 | Open | Open | Open | Open |Open |Open|
|------------+------+------+------+-------+-------+-----+----|
|486DX4 (3X) |2 & 3 | Open | Open | Open | Open |Open |Open|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (INTEL OVERDRIVE) |
|------------------------------------------------------------|
| Type | JP1 | JP2 | JP4 | JP5 |JP6 |JP7 |JP8 |JP10 |
|------------+------+------+------+-----+----+----+----+-----|
| Overdrive | Open |Closed| Open |1 & 2|Open|Open|Open|1 & 2|
| (2X-WT) | | | | | | | | |
|------------+------+------+------+-----+----+----+----+-----|
| Overdrive |Closed|Closed|Closed|1 & 2|Open|Open|Open|1 & 2|
| (2X-WB) | | | | | | | | |
|------------+------+------+------+-----+----+----+----+-----|
| Overdrive | Open |Closed| Open |1 & 2|Open|Open|Open|Open |
| (3X-WT) | | | | | | | | |
|------------+------+------+------+-----+----+----+----+-----|
| Overdrive |Closed|Closed|Closed|1 & 2|Open|Open|Open|Open |
| (3X-WB) | | | | | | | | |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (INTEL OVERDRIVE) |
|------------------------------------------------------------|
| Type | JP11 | JP12 | JP13 | JP23 | JP24 | JP41 | JP42 |
|-----------+------+------+------+------+------+------+------|
| Overdrive | 2 & | Open | Open | Open | Open | Open | Open |
| (2X-WT) | 3 | | | | | | |
|-----------+------+------+------+------+------+------+------|
| Overdrive | 2 & | Open | Open | Open | Open | Open | Open |
| (2X-WB) | 3 | | | | | | |
|-----------+------+------+------+------+------+------+------|
| Overdrive | 2 & | Open | Open | Open | Open | Open | Open |
| (3X-WT) | 3 | | | | | | |
|-----------+------+------+------+------+------+------+------|
| Overdrive | 2 & | Open | Open | Open | Open | Open | Open |
| (3X-WB) | 3 | | | | | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | RN1 | RN2 |
|--------------------+-------------------+-------------------|
| CX 486SX | Not installed | Not installed |
|--------------------+-------------------+-------------------|
| CX 487DX | Installed | Not installed |
|--------------------+-------------------+-------------------|
| AMD 486SX | Not installed | Installed |
|--------------------+-------------------+-------------------|
| AMD 486DX | Installed | Installed |
|--------------------+-------------------+-------------------|
| Intel 486SX | Not installed | Not installed |
|--------------------+-------------------+-------------------|
| Intel 486SL | Installed | Installed |
|--------------------+-------------------+-------------------|
| Intel 486DX/DX2 | Installed | Not installed |
|--------------------+-------------------+-------------------|
| Intel 486DX4 | Installed | Installed |
|--------------------+-------------------+-------------------|
| Overdrive | Installed | Installed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP20 | JP21 | JP25 | JP26 | JP27 |
|----------+---------+---------+----------+---------+--------|
| 25MHz | 1 & 2 | 1 & 2 | Closed | Open | Closed |
|----------+---------+---------+----------+---------+--------|
| 33MHz | 2 & 3 | 1 & 2 | Open | Open | Closed |
|----------+---------+---------+----------+---------+--------|
| 40MHz | 2 & 3 | 2 & 3 | Closed | Closed | Open |
|----------+---------+---------+----------+---------+--------|
| 50iMHz | 1 & 2 | 1 & 2 | Closed | Open | Closed |
|----------+---------+---------+----------+---------+--------|
| 50MHz | 2 & 3 | 2 & 3 | Open | Closed | Open |
|----------+---------+---------+----------+---------+--------|
| 66iMHz | 2 & 3 | 1 & 2 | Open | Open | Closed |
|----------+---------+---------+----------+---------+--------|
| 75iMHz | 1 & 2 | 1 & 2 | Closed | Open | Closed |
|----------+---------+---------+----------+---------+--------|
| 100iMHz | 2 & 3 | 2 & 3 | Open | Closed | Open |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+