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# UNIDENTIFIED
MB-4D50AV
Processor CXM6/SL80486SX/80486SX/CXM7/AM486DXLV-S/SL80486DX/80486DX/
80486DX2/Pentium Overdrive
Processor 25/33/40/50(internal)/50/66(internal)MHz
Speed
Chip Set ALI
Max. 128MB
Onboard
DRAM
Cache 128/256KB
BIOS AMI
Dimensions 254mm 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 |
|---------------+----------+----------------------+----------|
| Reset switch | J1 | Green PC connector | JP9 |
|---------------+----------+----------------------+----------|
| Turbo LED | J2 | Green PC connector | JP10 |
| | | (monitor) | |
|---------------+----------+----------------------+----------|
| External | J3 | Green PC | JP32 |
| battery | | connector-(external | |
| | | input) | |
|---------------+----------+----------------------+----------|
| Turbo switch | J4 | Green PC | JP33 |
| | | connector-(ring | |
| | | input) | |
|---------------+----------+----------------------+----------|
| Power LED & | J5 | 32-bit VESA local | SL1 - |
| keylock | | bus slots | SL3 |
|---------------+----------+----------------------+----------|
| Speaker | J6 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Battery type select internal | J3 | Open |
|---+----------------------------------+--------+------------|
| | Battery type select external | J3 | Closed |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | J3 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Real time clock enabled | JP12 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Real time clock disabled | JP12 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | JP13 | Closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | JP13 | Open |
|---+----------------------------------+--------+------------|
| » | CPU type select P24T/CXM6/CXM7 | JP20 | Closed |
| | 2x | | |
|---+----------------------------------+--------+------------|
| | CPU type select CXM6/CXM7 1x | JP20 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 1MB | NONE | NONE | NONE | (1) 256K x |
| | | | | 36 |
|------+-------------+-------------+------------+------------|
| 2MB | NONE | NONE | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 2MB | NONE | NONE | NONE | (1) 512K x |
| | | | | 36 |
|------+-------------+-------------+------------+------------|
| 3MB | NONE | (1) 256K x | NONE | (1) 512K x |
| | | 36 | | 36 |
|------+-------------+-------------+------------+------------|
| 3MB | NONE | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 4MB | NONE | NONE | NONE | (1) 1M x |
| | | | | 36 |
|------+-------------+-------------+------------+------------|
| 4MB | NONE | (1) 512K x | NONE | (1) 512K x |
| | | 36 | | 36 |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 256K x | (1) 256K x | (1) 256K x | (1) 256K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 5MB | NONE | NONE | (1) 256K x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 5MB | NONE | NONE | (1) 1M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 6MB | NONE | (1) 1M x 36 | NONE | (1) 512K x |
| | | | | 36 |
|------+-------------+-------------+------------+------------|
| 6MB | NONE | (1) 256K x | (1) 256K x | (1) 1M x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 6MB | NONE | (1) 1M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 6MB | NONE | (1) 256K x | (1) 1M x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 8MB | NONE | NONE | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 8MB | NONE | NONE | NONE | (1) 2M x |
| | | | | 36 |
|------+-------------+-------------+------------+------------|
| 9MB | NONE | (1) 256K x | NONE | (1) 2M x |
| | | 36 | | 36 |
|------+-------------+-------------+------------+------------|
| 9MB | NONE | (1) 1M x 36 | (1) 256K x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 9MB | NONE | (1) 256K x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 9MB | NONE | (1) 1M x 36 | (1) 1M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 10MB | NONE | (1) 512K x | NONE | (1) 2M x |
| | | 36 | | 36 |
|------+-------------+-------------+------------+------------|
| 10MB | NONE | (1) 2M x 36 | NONE | (1) 512K x |
| | | | | 36 |
|------+-------------+-------------+------------+------------|
| 12MB | NONE | (1) 1M x 36 | NONE | (1) 2M x |
| | | | | 36 |
|------+-------------+-------------+------------+------------|
| 12MB | NONE | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 13MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | NONE | NONE | NONE | (1) 4M x |
| | | | | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | NONE | (1) 2M x 36 | NONE | (1) 2M x |
| | | | | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 17MB | NONE | NONE | (1) 256K x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 17MB | NONE | NONE | (1) 4M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 18MB | NONE | (1) 4M x 36 | NONE | (1) 512K x |
| | | | | 36 |
|------+-------------+-------------+------------+------------|
| 18MB | NONE | (1) 256K x | (1) 256K x | (1) 4M x |
| | | 36 | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 18MB | NONE | (1) 4M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 18MB | NONE | (1) 256K x | (1) 4M x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 20MB | NONE | NONE | (1) 1M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 20MB | NONE | NONE | (1) 4M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 21MB | NONE | (1) 1M x 36 | (1) 256K x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 21MB | NONE | (1) 4M x 36 | (1) 256K x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 21MB | NONE | (1) 256K x | (1) 1M x | (1) 4M x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 21MB | NONE | (1) 4M x 36 | (1) 1M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 21MB | NONE | (1) 256K x | (1) 4M x | (1) 1M x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 21MB | NONE | (1) 1M x 36 | (1) 4M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 24MB | NONE | (1) 4M x 36 | NONE | (1) 2M x |
| | | | | 36 |
|------+-------------+-------------+------------+------------|
| 24MB | NONE | (1) 1M x 36 | (1) 1M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 24MB | NONE | (1) 4M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 24MB | NONE | (1) 1M x 36 | (1) 4M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 25MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 28MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 28MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 32MB | NONE | NONE | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 32MB | NONE | NONE | NONE | (1) 8M x |
| | | | | 36 |
|------+-------------+-------------+------------+------------|
| 33MB | NONE | (1) 256K x | NONE | (1) 8M x |
| | | 36 | | 36 |
|------+-------------+-------------+------------+------------|
| 33MB | NONE | (1) 4M x 36 | (1) 256K x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 33MB | NONE | (1) 256K x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 33MB | NONE | (1) 4M x 36 | (1) 4M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 34MB | NONE | (1) 512K x | NONE | (1) 8M x |
| | | 36 | | 36 |
|------+-------------+-------------+------------+------------|
| 34MB | NONE | (1) 8M x 36 | NONE | (1) 512K x |
| | | | | 36 |
|------+-------------+-------------+------------+------------|
| 36MB | NONE | (1) 1M x 36 | NONE | (1) 8M x |
| | | | | 36 |
|------+-------------+-------------+------------+------------|
| 36MB | NONE | (1) 4M x 36 | (1) 1M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 36MB | NONE | (1) 1M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 36MB | NONE | (1) 4M x 36 | (1) 4M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 40MB | NONE | (1) 2M x 36 | NONE | (1) 8M x |
| | | | | 36 |
|------+-------------+-------------+------------+------------|
| 40MB | NONE | (1) 8M x 36 | NONE | (1) 2M x |
| | | | | 36 |
|------+-------------+-------------+------------+------------|
| 48MB | NONE | (1) 4M x 36 | NONE | (1) 8M x |
| | | | | 36 |
|------+-------------+-------------+------------+------------|
| 48MB | NONE | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 49MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 52MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 64MB | NONE | NONE | NONE | (1) 16M x |
| | | | | 36 |
|------+-------------+-------------+------------+------------|
| 64MB | NONE | (1) 8M x 36 | NONE | (1) 8M x |
| | | | | 36 |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 65MB | NONE | NONE | (1) 256K x | (1) 16M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 65MB | NONE | NONE | (1) 16M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 66MB | NONE | (1) 16M x | NONE | (1) 512K x |
| | | 36 | | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 66MB | NONE | (1) 256K x | (1) 256K x | (1) 16M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 66MB | NONE | (1) 16M x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 66MB | NONE | (1) 256K x | (1) 16M x | (1) 256K x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 68MB | NONE | NONE | (1) 1M x | (1) 16M x |
| | | | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 68MB | NONE | NONE | (1) 16M x | (1) 1M x |
| | | | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 69MB | NONE | (1) 1M x | (1) 256K x | (1) 16M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 69MB | NONE | (1) 16M x | (1) 256K x | (1) 1M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 69MB | NONE | (1) 256K x | (1) 1M x | (1) 16M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 69MB | NONE | (1) 16M x | (1) 1M x | (1) 256K x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 69MB | NONE | (1) 256K x | (1) 16M x | (1) 1M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 69MB | NONE | (1) 1M x | (1) 16M x | (1) 256K x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 72MB | NONE | (1) 16M x | NONE | (1) 2M x |
| | | 36 | | 36 |
|-------+-------------+------------+------------+------------|
| 72MB | NONE | (1) 1M x | (1) 1M x | (1) 16M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 72MB | NONE | (1) 16M x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 76MB | (1) 1M x 36 | (1) 1M x | (1) 1M x | (1) 16M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 80MB | NONE | NONE | (1) 4M x | (1) 16M x |
| | | | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 80MB | NONE | (1) 1M x | (1) 16M x | (1) 1M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 81MB | NONE | (1) 16M x | (1) 256K x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 81MB | NONE | (1) 256K x | (1) 4M x | (1) 16M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 81MB | NONE | (1) 256K x | (1) 16M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 81MB | NONE | (1) 4M x | (1) 16M x | (1) 256K x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 84MB | NONE | (1) 4M x | (1) 1M x | (1) 16M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 84MB | NONE | (1) 16M x | (1) 1M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 84MB | NONE | (1) 1M x | (1) 4M x | (1) 16M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 84MB | NONE | (1) 16M x | (1) 4M x | (1) 1M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 84MB | NONE | (1) 1M x | (1) 16M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 84MB | NONE | (1) 4M x | (1) 16M x | (1) 1M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 88MB | (1) 4M x 36 | (1) 1M x | (1) 1M x | (1) 16M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 96MB | NONE | (1) 16M x | NONE | (1) 8M x |
| | | 36 | | 36 |
|-------+-------------+------------+------------+------------|
| 96MB | NONE | (1) 4M x | (1) 4M x | (1) 16M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 96MB | NONE | (1) 16M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 96MB | NONE | (1) 4M x | (1) 16M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 97MB | (1) 16M x | (1) 4M x | (1) 4M x | (1) 256K x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 100MB | (1) 16M x | (1) 4M x | (1) 4M x | (1) 1M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 112MB | (1) 4M x 36 | (1) 4M x | (1) 4M x | (1) 16M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 112MB | (1) 16M x | (1) 4M x | (1) 4M x | (1) 4M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 112MB | (1) 4M x 36 | (1) 4M x | (1) 4M x | (1) 16M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 128MB | NONE | NONE | (1) 16M x | (1) 16M x |
| | | | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|-------+-------------+-------------+------------------------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 or (1) 32K |
| | | | x 8 |
|-------+-------------+-------------+------------------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP3 | JP4 |
|------------------+--------------------+--------------------|
| 128KB | pins 2 & 3 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 256KB | pins 1 & 2 closed | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP8 | JP16 | JP17 | JP18 | JP19 |
|----------------+-------+--------+--------+--------+--------|
| CX M6 | 5 & 6 | Open | Open | Closed | Open |
|----------------+-------+--------+--------+--------+--------|
| SL80486SX | 1 & 2 | Closed | Closed | Open | Closed |
|----------------+-------+--------+--------+--------+--------|
| 80486SX | Open | Closed | Closed | Open | Open |
|----------------+-------+--------+--------+--------+--------|
| CX M7 | 5 & 6 | Closed | Open | Closed | Open |
|----------------+-------+--------+--------+--------+--------|
| AM486DXLV-S | 3 & 4 | Closed | Closed | Open | Open |
|----------------+-------+--------+--------+--------+--------|
| SL80486DX | 1 & 2 | Closed | Closed | Open | Closed |
|----------------+-------+--------+--------+--------+--------|
| 80486DX | Open | Closed | Closed | Open | Open |
|----------------+-------+--------+--------+--------+--------|
| 80486DX2 | Open | Closed | Closed | Open | Open |
|----------------+-------+--------+--------+--------+--------|
| Pentium | 1 & 2 | Closed | Closed | Open | Open |
| Overdrive | | | | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | JP21 | JP22 | JP23 | JP24 | JP25 |
|-------------------+--------+-------+-------+-------+-------|
| CX M6 | 1 & 2 | Open | 2 & 3 | 1 & 2 | 1 & 2 |
|-------------------+--------+-------+-------+-------+-------|
| SL80486SX | 1 & 2 | Open | 1 & 2 | 2 & 3 | 1 & 2 |
|-------------------+--------+-------+-------+-------+-------|
| 80486SX | 1 & 2 | Open | 2 & 3 | Open | 1 & 2 |
|-------------------+--------+-------+-------+-------+-------|
| CX M7 | 2 & 3 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 |
|-------------------+--------+-------+-------+-------+-------|
| AM486DXLV-S | 2 & 3 | 2 & 3 | 2 & 3 | Open | 1 & 2 |
|-------------------+--------+-------+-------+-------+-------|
| SL80486DX | 2 & 3 | 2 & 3 | 1 & 2 | 2 & 3 | 1 & 2 |
|-------------------+--------+-------+-------+-------+-------|
| 80486DX | 2 & 3 | 2 & 3 | 2 & 3 | Open | 1 & 2 |
|-------------------+--------+-------+-------+-------+-------|
| 80486DX2 | 2 & 3 | 2 & 3 | 2 & 3 | Open | 1 & 2 |
|-------------------+--------+-------+-------+-------+-------|
| Pentium Overdrive | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 2 & 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | JP27 | JP28 | JP29 | JP30 | JP31 |
|-----------------+--------+--------+--------+-------+-------|
| CX M6 | Closed | Open | Closed | 4 & 5 | 4 & 5 |
|-----------------+--------+--------+--------+-------+-------|
| SL80486SX | Open | Open | Open | 1 & 2 | 1 & 2 |
|-----------------+--------+--------+--------+-------+-------|
| 80486SX | Open | Open | Closed | Open | Open |
|-----------------+--------+--------+--------+-------+-------|
| CX M7 | Closed | Open | Closed | 4 & 5 | 4 & 5 |
|-----------------+--------+--------+--------+-------+-------|
| AM486DXLV-S | Open | Open | Open | 2 & 3 | 2 & 3 |
|-----------------+--------+--------+--------+-------+-------|
| SL80486DX | Open | Open | Open | 1 & 2 | 1 & 2 |
|-----------------+--------+--------+--------+-------+-------|
| 80486DX | Open | Open | Closed | Open | Open |
|-----------------+--------+--------+--------+-------+-------|
| 80486DX2 | Open | Open | Closed | Open | Open |
|-----------------+--------+--------+--------+-------+-------|
| Pentium | Open | Closed | Open | 1 & 2 | 1 & 2 |
| Overdrive | | | | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP40 |
|-----------------------+------------------------------------|
| 80486 | pins 1 & 2 closed, pins 3 & 4 open |
|------------------------------------------------------------|
| Note: The location of JP40 is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP7 | JP26 | JP35 | JP36 |
|--------+---------------+-----------+-----------+-----------|
| 25MHz | pins 1 & 2, 5 | pins 1 & | pins 1 & | pins 1 & |
| | & 6 closed | 2 closed | 2 closed | 2 closed |
|--------+---------------+-----------+-----------+-----------|
| 33MHz | pins 3 & 4, 5 | pins 1 & | pins 1 & | pins 1 & |
| | & 6 closed | 2 closed | 2 closed | 2 closed |
|--------+---------------+-----------+-----------+-----------|
| 40MHz | pins 1 & 2, 3 | pins 2 & | pins 2 & | pins 2 & |
| | & 4 closed | 3 closed | 3 closed | 3 closed |
|--------+---------------+-----------+-----------+-----------|
| 50iMHz | pins 1 & 2, 5 | pins 1 & | pins 1 & | pins 1 & |
| | & 6 closed | 2 closed | 2 closed | 2 closed |
|--------+---------------+-----------+-----------+-----------|
| 50MHz | pins 1 & 2, 5 | pins 2 & | pins 2 & | pins 2 & |
| | & 6 closed | 3 closed | 3 closed | 3 closed |
|--------+---------------+-----------+-----------+-----------|
| 66iMHz | pins 3 & 4, 5 | pins 1 & | pins 1 & | pins 1 & |
| | & 6 closed | 2 closed | 2 closed | 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA WAIT STATE CONFIGURATION |
|------------------------------------------------------------|
| Wait states | JP40 |
|----------------------------+-------------------------------|
| 0 wait states | pins 5 & 6 open |
|----------------------------+-------------------------------|
| 1 wait state | pins 5 & 6 closed |
|------------------------------------------------------------|
| Note: The location of JP40 is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BUS SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | JP40 |
|----------------------------+-------------------------------|
| <= 33MHz | pins 7 & 8 open |
|----------------------------+-------------------------------|
| > 33MHz | pins 7 & 8 closed |
|------------------------------------------------------------|
| Note: The location of JP40 is unidentified. |
+------------------------------------------------------------+