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# YOUNG MICRO SYSTEMS, INC.
VS48664-3VL
Processor CXM6/AM486SX/SL80486/80486SX/CXM7/AM486DX/80486DX/80486DX2/
P24C/P24D/Pentium Overdrive
Processor 25/33/40/50(internal)/50/66(internal)MHz
Speed
Chip Set Symphony
Max. 128MB
Onboard
DRAM
Cache 64/128/256/512/1024KB
BIOS AMI/Phoenix
Dimensions 330mm x 218mm
I/O 32-bit VESA local bus slots (3), green PC connector
Options
NPU None
Options
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+----------+----------------------+----------|
| Power LED & | CN1 | Turbo LED | CN5 |
| keylock | | | |
|---------------+----------+----------------------+----------|
| Speaker | CN2 | Green PC connector | JP15 |
|---------------+----------+----------------------+----------|
| Turbo switch | CN3 | 32-bit VESA local | SL1 - |
| | | bus slots | SL3 |
|---------------+----------+----------------------+----------|
| Reset switch | CN4 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|-----------------------------------+----------+-------------|
| » | Factory configured - do not | J27 | N/A |
| | alter | | |
|----+------------------------------+----------+-------------|
| » | Factory configured - do not | J28 | N/A |
| | alter | | |
|----+------------------------------+----------+-------------|
| » | Factory configured - do not | J29 | N/A |
| | alter | | |
|----+------------------------------+----------+-------------|
| » | Factory configured - do not | J30 | N/A |
| | alter | | |
|----+------------------------------+----------+-------------|
| » | Factory configured - do not | J31 | N/A |
| | alter | | |
|----+------------------------------+----------+-------------|
| » | Factory configured - do not | J32 | N/A |
| | alter | | |
|----+------------------------------+----------+-------------|
| » | Factory configured - do not | J33 | N/A |
| | alter | | |
|----+------------------------------+----------+-------------|
| » | Factory configured - do not | J34 | N/A |
| | alter | | |
|----+------------------------------+----------+-------------|
| » | Factory configured - do not | JP3 | N/A |
| | alter | | |
|----+------------------------------+----------+-------------|
| » | Factory configured - do not | JP9 | N/A |
| | alter | | |
|----+------------------------------+----------+-------------|
| » | Parity check enabled | JP16 | pins 1 & 2 |
| | | | closed |
|----+------------------------------+----------+-------------|
| | Parity check disabled | JP16 | pins 2 & 3 |
| | | | closed |
|----+------------------------------+----------+-------------|
| » | Monitor type select color | JP17 | Closed |
|----+------------------------------+----------+-------------|
| | Monitor type select | JP17 | Open |
| | monochrome | | |
|----+------------------------------+----------+-------------|
| » | BIOS type select normal | JP18 | pins 1 & 2 |
| | | | closed |
|----+------------------------------+----------+-------------|
| | BIOS type select flash | JP18 | pins 2 & 3 |
| | | | closed |
|----+------------------------------+----------+-------------|
| » | Factory configured - do not | JP19 | N/A |
| | alter | | |
|----+------------------------------+----------+-------------|
| » | Factory configured - do not | JP22 | N/A |
| | alter | | |
|----+------------------------------+----------+-------------|
| » | Factory configured - do not | JP28 | N/A |
| | alter | | |
|----+------------------------------+----------+-------------|
| » | Factory configured - do not | JP29 | N/A |
| | alter | | |
|----+------------------------------+----------+-------------|
| » | Factory configured - do not | JP30 | N/A |
| | alter | | |
|----+------------------------------+----------+-------------|
| » | Factory configured - do not | JP31 | N/A |
| | alter | | |
|------------------------------------------------------------|
| Note: The location of jumpers JP9, JP28, JP29, JP30 & JP31 |
| are unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
|------------+---------------+---------------+---------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (2) 8K x 8 |
|------------+---------------+---------------+---------------|
| 128KB | (4) 32K x 8 | NONE | (2) 8K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (2) 32K x 8 |
|------------+---------------+---------------+---------------|
| 512KB | (4) 128K x 8 | NONE | (2) 32K x 8 |
|------------+---------------+---------------+---------------|
| 1MB | (4) 128K x 8 | (4) 128K x 8 | (2) 128K x 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 |
|------------------------------------------------------------|
| Type | JP1 | JP2 | JP4 | JP5 | JP6 |
|--------------+---------+---------+--------+-------+--------|
| CXM6 1x | Open | Open | Open | 2 & 3 | Closed |
|--------------+---------+---------+--------+-------+--------|
| CXM6 2x | Open | Open | Open | 2 & 3 | Closed |
|--------------+---------+---------+--------+-------+--------|
| AM486SX (WT) | Open | Closed | Open | 2 & 3 | Closed |
|--------------+---------+---------+--------+-------+--------|
| AM486SX (WB) | Closed | Closed | Open | 2 & 3 | Closed |
|--------------+---------+---------+--------+-------+--------|
| SL80486 | Open | Closed | Open | 1 & 2 | Closed |
|--------------+---------+---------+--------+-------+--------|
| 80486SX | Open | Open | Open | 2 & 3 | Closed |
|--------------+---------+---------+--------+-------+--------|
| AM486DX (WT) | Open | Closed | Open | 2 & 3 | Closed |
|--------------+---------+---------+--------+-------+--------|
| AM486DX (WB) | Closed | Closed | Closed | 2 & 3 | Closed |
|--------------+---------+---------+--------+-------+--------|
| CXM7 1x | Open | Open | Open | 1 & 2 | Closed |
|--------------+---------+---------+--------+-------+--------|
| CXM7 2x | Open | Open | Open | 1 & 2 | Closed |
|--------------+---------+---------+--------+-------+--------|
| 80486DX | Open | Open | Open | 1 & 2 | Closed |
|--------------+---------+---------+--------+-------+--------|
| 80486DX2 | Open | Open | Open | 1 & 2 | Closed |
|--------------+---------+---------+--------+-------+--------|
| P24C 2x | Open | Closed | Open | 1 & 2 | Closed |
|--------------+---------+---------+--------+-------+--------|
| P24C 3x | Open | Closed | Open | 1 & 2 | Closed |
|--------------+---------+---------+--------+-------+--------|
| P24D (WT) | Open | Closed | Open | 1 & 2 | Closed |
|--------------+---------+---------+--------+-------+--------|
| P24D (WB) | Closed | Closed | Closed | 1 & 2 | Closed |
|--------------+---------+---------+--------+-------+--------|
| P24T 2x (WT) | Open | Closed | Open | 1 & 2 | Open |
|--------------+---------+---------+--------+-------+--------|
| P24T 2x (WB) | Closed | Closed | Closed | 1 & 2 | Open |
|--------------+---------+---------+--------+-------+--------|
| P24T 3x (WT) | Open | Closed | Open | 1 & 2 | Open |
|--------------+---------+---------+--------+-------+--------|
| P24T 3x (WB) | Closed | Closed | Closed | 1 & 2 | Open |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | JP7 | JP8 | JP10 | JP11 | JP12 |
|---------------+--------+---------+--------+-------+--------|
| CXM6 1x | 1 & 2 | Closed | Open | Open | Open |
|---------------+--------+---------+--------+-------+--------|
| CXM6 2x | 1 & 2 | Closed | Open | Open | Closed |
|---------------+--------+---------+--------+-------+--------|
| AM486SX (WT) | Open | Open | Open | Open | Open |
|---------------+--------+---------+--------+-------+--------|
| AM486SX (WB) | Open | Open | Open | Open | Open |
|---------------+--------+---------+--------+-------+--------|
| SL80486 | Open | Open | Open | 1 & 2 | Open |
|---------------+--------+---------+--------+-------+--------|
| 80486SX | Open | Open | Open | Open | Open |
|---------------+--------+---------+--------+-------+--------|
| AM486DX (WT) | Open | Open | Open | 1 & 2 | Open |
|---------------+--------+---------+--------+-------+--------|
| AM486DX (WB) | Open | Open | Open | 1 & 2 | Open |
|---------------+--------+---------+--------+-------+--------|
| CXM7 1x | 1 & 2 | Closed | Open | 1 & 2 | Open |
|---------------+--------+---------+--------+-------+--------|
| CXM7 2x | 1 & 2 | Closed | Open | 1 & 2 | Closed |
|---------------+--------+---------+--------+-------+--------|
| 80486DX | Open | Open | Open | 1 & 2 | Open |
|---------------+--------+---------+--------+-------+--------|
| 80486DX2 | Open | Open | Open | 1 & 2 | Open |
|---------------+--------+---------+--------+-------+--------|
| P24C 2x | Open | Open | 1 & 2 | 2 & 3 | Open |
|---------------+--------+---------+--------+-------+--------|
| P24C 3x | Open | Open | Open | 2 & 3 | Open |
|---------------+--------+---------+--------+-------+--------|
| P24D (WT) | 2 & 3 | Open | Open | 1 & 2 | Open |
|---------------+--------+---------+--------+-------+--------|
| P24D (WB) | 2 & 3 | Open | Open | 1 & 2 | Open |
|---------------+--------+---------+--------+-------+--------|
| P24T 2x (WT) | Open | Open | 1 & 2 | 2 & 3 | Open |
|---------------+--------+---------+--------+-------+--------|
| P24T 2x (WB) | Open | Open | 1 & 2 | 2 & 3 | Open |
|---------------+--------+---------+--------+-------+--------|
| P24T 3x (WT) | Open | Open | Open | 2 & 3 | Open |
|---------------+--------+---------+--------+-------+--------|
| P24T 3x (WB) | Open | Open | Open | 2 & 3 | Open |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | JP13 | JP23 | JP24 | JP41 | JP42 |
|--------------+---------+---------+---------+-------+-------|
| CXM6 1x | Closed | Closed | Closed | Open | Open |
|--------------+---------+---------+---------+-------+-------|
| CXM6 2x | Closed | Closed | Closed | Open | Open |
|--------------+---------+---------+---------+-------+-------|
| AM486SX (WT) | Open | Open | Open | 2 & 3 | 2 & 3 |
|--------------+---------+---------+---------+-------+-------|
| AM486SX (WB) | Open | Open | Open | 2 & 3 | 2 & 3 |
|--------------+---------+---------+---------+-------+-------|
| SL80486 | Open | Open | Open | Open | Open |
|--------------+---------+---------+---------+-------+-------|
| 80486SX | Open | Closed | Closed | Open | Open |
|--------------+---------+---------+---------+-------+-------|
| AM486DX (WT) | Open | Open | Open | 2 & 3 | 2 & 3 |
|--------------+---------+---------+---------+-------+-------|
| AM486DX (WB) | Open | Open | Open | 2 & 3 | 2 & 3 |
|--------------+---------+---------+---------+-------+-------|
| CXM7 1x | Closed | Closed | Closed | Open | Open |
|--------------+---------+---------+---------+-------+-------|
| CXM7 2x | Closed | Closed | Closed | Open | Open |
|--------------+---------+---------+---------+-------+-------|
| 80486DX | Open | Closed | Closed | Open | Open |
|--------------+---------+---------+---------+-------+-------|
| 80486DX2 | Open | Closed | Closed | Open | Open |
|--------------+---------+---------+---------+-------+-------|
| P24C 2x | Open | Open | Open | Open | Open |
|--------------+---------+---------+---------+-------+-------|
| P24C 3x | Open | Open | Open | Open | Open |
|--------------+---------+---------+---------+-------+-------|
| P24D (WT) | Open | Open | Open | 1 & 2 | 1 & 2 |
|--------------+---------+---------+---------+-------+-------|
| P24D (WB) | Open | Open | Open | 1 & 2 | 1 & 2 |
|--------------+---------+---------+---------+-------+-------|
| P24T 2x (WT) | Open | Open | Open | Open | Open |
|--------------+---------+---------+---------+-------+-------|
| P24T 2x (WB) | Open | Open | Open | Open | Open |
|--------------+---------+---------+---------+-------+-------|
| P24T 3x (WT) | Open | Open | Open | Open | Open |
|--------------+---------+---------+---------+-------+-------|
| P24T 3x (WB) | Open | Open | Open | Open | Open |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | RN1 | RN2 |
|--------------+----------------------+----------------------|
| CXM6 1x | Open | Open |
|--------------+----------------------+----------------------|
| CXM6 2x | Open | Open |
|--------------+----------------------+----------------------|
| AM486SX (WT) | Open | 1 & 2, 3 & 4, 5 & 6, |
| | | 7 & 8 |
|--------------+----------------------+----------------------|
| AM486SX (WB) | Open | 1 & 2, 3 & 4, 5 & 6, |
| | | 7 & 8 |
|--------------+----------------------+----------------------|
| SL80486 | 1 & 2, 3 & 4, 5 & 6, | 1 & 2, 3 & 4, 5 & 6, |
| | 7 & 8 | 7 & 8 |
|--------------+----------------------+----------------------|
| 80486SX | Open | Open |
|--------------+----------------------+----------------------|
| AM486DX (WT) | 1 & 2, 3 & 4, 5 & 6, | 1 & 2, 3 & 4, 5 & 6, |
| | 7 & 8 | 7 & 8 |
|--------------+----------------------+----------------------|
| AM486DX (WB) | 1 & 2, 3 & 4, 5 & 6, | 1 & 2, 3 & 4, 5 & 6, |
| | 7 & 8 | 7 & 8 |
|--------------+----------------------+----------------------|
| CXM7 1x | 1 & 2, 3 & 4, 5 & 6, | Open |
| | 7 & 8 | |
|--------------+----------------------+----------------------|
| CXM7 2x | 1 & 2, 3 & 4, 5 & 6, | Open |
| | 7 & 8 | |
|--------------+----------------------+----------------------|
| 80486DX | 1 & 2, 3 & 4, 5 & 6, | Open |
| | 7 & 8 | |
|--------------+----------------------+----------------------|
| 80486DX2 | 1 & 2, 3 & 4, 5 & 6, | Open |
| | 7 & 8 | |
|--------------+----------------------+----------------------|
| P24C 2x | 1 & 2, 3 & 4, 5 & 6, | 1 & 2, 3 & 4, 5 & 6, |
| | 7 & 8 | 7 & 8 |
|--------------+----------------------+----------------------|
| P24C 3x | 1 & 2, 3 & 4, 5 & 6, | 1 & 2, 3 & 4, 5 & 6, |
| | 7 & 8 | 7 & 8 |
|--------------+----------------------+----------------------|
| P24D (WT) | 1 & 2, 3 & 4, 5 & 6, | 1 & 2, 3 & 4, 5 & 6, |
| | 7 & 8 | 7 & 8 |
|--------------+----------------------+----------------------|
| P24D (WB) | 1 & 2, 3 & 4, 5 & 6, | 1 & 2, 3 & 4, 5 & 6, |
| | 7 & 8 | 7 & 8 |
|--------------+----------------------+----------------------|
| P24T 2x (WT) | 1 & 2, 3 & 4, 5 & 6, | 1 & 2, 3 & 4, 5 & 6, |
| | 7 & 8 | 7 & 8 |
|--------------+----------------------+----------------------|
| P24T 2x (WB) | 1 & 2, 3 & 4, 5 & 6, | 1 & 2, 3 & 4, 5 & 6, |
| | 7 & 8 | 7 & 8 |
|--------------+----------------------+----------------------|
| P24T 3x (WT) | 1 & 2, 3 & 4, 5 & 6, | 1 & 2, 3 & 4, 5 & 6, |
| | 7 & 8 | 7 & 8 |
|--------------+----------------------+----------------------|
| P24T 3x (WB) | 1 & 2, 3 & 4, 5 & 6, | 1 & 2, 3 & 4, 5 & 6, |
| | 7 & 8 | 7 & 8 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP25 | JP26 | JP27 |
|---------------+--------------+--------------+--------------|
| 25MHz | Closed | Open | Closed |
|---------------+--------------+--------------+--------------|
| 33MHZ | Open | Open | Closed |
|---------------+--------------+--------------+--------------|
| 40MHz | Closed | Closed | Open |
|---------------+--------------+--------------+--------------|
| 50iMHz | Closed | Open | Closed |
|---------------+--------------+--------------+--------------|
| 50MHz | Open | Closed | Open |
|---------------+--------------+--------------+--------------|
| 66iMHz | Open | Open | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | CN6 |
|--------------------------+---------------------------------|
| 3.3v | Open |
|--------------------------+---------------------------------|
| 5v | pins 1 & 2, 3 & 4, 5 & 6 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA WAIT STATE CONFIGURATION |
|------------------------------------------------------------|
| Wait states | JP20 |
|----------------------------+-------------------------------|
| 0 wait states | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 1 wait state | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BUS SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | JP21 |
|----------------------------+-------------------------------|
| <= 33MHz | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| > 33MHz | pins 2 & 3 closed |
+------------------------------------------------------------+