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# ACHME COMPUTER, INC.
MS-4137 (VLB 486 AL5)
Processor 80486SX/CX486M7/AMD486DXL/80486DX/80486DX2/Pentium Overdrive
Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set ALI
Max. 64MB
Onboard
DRAM
Cache 128/256KB
BIOS AMI
Dimensions 254mm x 220mm
I/O 32-bit VESA local bus slots (3), green PC connector
Options
NPU None
Options
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+-----------+-----------------+-----------|
| External battery | JB | Reset switch | JFP (pins |
| | | | 19-20) |
|------------------+-----------+-----------------+-----------|
| Power LED & | JFP (pins | Green PC | JG1 |
| keylock | 1-5) | connector | |
|------------------+-----------+-----------------+-----------|
| Speaker | JFP (pins | Green PC | JG2 |
| | 7-10) | connector | |
|------------------+-----------+-----------------+-----------|
| Green PC | JFP (pins | Green PC | JG3 |
| connector | 9-10) | connector | |
|------------------+-----------+-----------------+-----------|
| Turbo LED | JFP (pins | 32-bit VESA | SL1 - SL3 |
| | 12-13) | local bus slots | |
|------------------+-----------+-----------------+-----------|
| Turbo switch | JFP (pins | | |
| | 15-17) | | |
|------------------------------------------------------------|
| Note: If speaker is installed, JFP (pins 9-10) are not |
| used. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Battery type select internal | JB | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Battery type select external | JB | Closed |
|---+----------------------------------+--------+------------|
| » | CPU type select Intel/AMD | JC1 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CPU type select Cyrix | JC1 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JC2 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JC3 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JC9 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | CPU type select P24C not | JK5 | Closed |
| | installed | | |
|---+----------------------------------+--------+------------|
| | CPU type select P24C installed | JK5 | Open |
|---+----------------------------------+--------+------------|
| » | Monitor type select monochrome | JP1 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Monitor type select color | JP1 | pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 1MB | (1) 256K x | NONE | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 2MB | (1) 256K x | (1) 256K x | NONE | NONE |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 3MB | (1) 256K x | (1) 512K x | NONE | NONE |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 3MB | (1) 256K x | (1) 256K x | (1) 256K x | NONE |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 3MB | (1) 512K x | (1) 256K x | NONE | NONE |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 1M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 256K x | (1) 256K x | (1) 256K x | (1) 256K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 512K x | (1) 512K x | NONE | NONE |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 512K x | (1) 256K x | (1) 256K x | NONE |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 256K x | (1) 1M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 1M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 1M x 36 | (1) 512K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 256K x | (1) 256K x | (1) 1M x | NONE |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 256K x | (1) 1M x 36 | (1) 256K x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 512K x | (1) 1M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 7MB | (1) 256K x | (1) 256K x | (1) 256K x | (1) 1M x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 7MB | (1) 512K x | (1) 256K x | (1) 1M x | NONE |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 9MB | (1) 256K x | (1) 2M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 9MB | (1) 256K x | (1) 1M x 36 | (1) 1M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 9MB | (1) 1M x 36 | (1) 1M x 36 | (1) 256K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 9MB | (1) 2M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 512K x | (1) 2M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 2M x 36 | (1) 512K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 2M x 36 | (1) 256K x | (1) 256K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 512K x | (1) 1M x 36 | (1) 1M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 2M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 2M x 36 | (1) 1M x 36 | NONE | NONE |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 13MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 13MB | (1) 2M x 36 | (1) 256K x | (1) 1M x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 4M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 2M x 36 | (1) 2M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 2M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 17MB | (1) 256K x | (1) 4M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 17MB | (1) 4M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 4M x 36 | (1) 512K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 256K x | (1) 256K x | (1) 4M x | NONE |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 512K x | (1) 4M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 19MB | (1) 256K x | (1) 256K x | (1) 256K x | (1) 4M x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 19MB | (1) 512K x | (1) 256K x | (1) 4M x | NONE |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 1M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 4M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 21MB | (1) 256K x | (1) 1M x 36 | (1) 4M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 21MB | (1) 4M x 36 | (1) 1M x 36 | (1) 256K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 22MB | (1) 512K x | (1) 1M x 36 | (1) 4M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 22MB | (1) 512K x | (1) 1M x 36 | (1) 4M x | NONE |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 4M x 36 | (1) 2M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 2M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 2M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 25MB | (1) 2M x 36 | (1) 256K x | (1) 4M x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 28MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 28MB | (1) 2M x 36 | (1) 1M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 33MB | (1) 256K x | (1) 8M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 33MB | (1) 4M x 36 | (1) 4M x 36 | (1) 256K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 33MB | (1) 8M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 34MB | (1) 512K x | (1) 8M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 34MB | (1) 8M x 36 | (1) 512K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 34MB | (1) 8M x 36 | (1) 256K x | (1) 256K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 1M x 36 | (1) 8M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 4M x 36 | (1) 1M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 8M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 37MB | (1) 8M x 36 | (1) 256K x | (1) 1M x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 2M x 36 | (1) 8M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 8M x 36 | (1) 2M x 36 | NONE | NONE |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+---------------+----------+------------|
| 40MB | (1) 8M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+---------------+----------+------------|
| 48MB | (1) 4M x 36 | (1) 8M x 36 | NONE | NONE |
|------+-------------+---------------+----------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+---------------+----------+------------|
| 48MB | (1) 8M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+---------------+----------+------------|
| 49MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+---------------+----------+------------|
| 49MB | (1) 8M x 36 | (1) 256K x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+---------------+----------+------------|
| 52MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+---------------+----------+------------|
| 52MB | (1) 8M x 36 | (1) 1M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+---------------+----------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+---------------+----------+------------|
| 64MB | (1) 8M x 36 | (1) 8M x 36 | NONE | NONE |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|---------+--------------+--------------+--------------------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K/16K/32K x 8 |
|---------+--------------+--------------+--------------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 16K/32K x 8 |
|---------+--------------+--------------+--------------------|
| 256KB | (4) 64K x 8 | NONE | (1) 16K/32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JS1 | JS2 | JS3 |
|-------+-----------------+-----------------+----------------|
| 128KB | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed |
|-------+-----------------+-----------------+----------------|
| 256KB | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
|-------+-----------------+-----------------+----------------|
| 256KB | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JC4 | JC5 | JC6 |
|-------------------+------------+------------+--------------|
| 80486SX | 2 & 3 | 4 & 5 | Open |
|-------------------+------------+------------+--------------|
| SL80486SX | 2 & 3 | 5 & 6 | JC5 pin1 & |
| | | | JC6 pin1 |
|-------------------+------------+------------+--------------|
| 80486DX/DX2 | 1 & 2, 3 & | 4 & 5 | 3 & 4 |
| | 4 | | |
|-------------------+------------+------------+--------------|
| CX486M7 | 1 & 2, 3 & | 2 & 3, 5 & | 3 & 4, 5 & 6 |
| | 4 | 6 | |
|-------------------+------------+------------+--------------|
| AMD486DXL | 1 & 2, 3 & | 4 & 5 | 3 & 4 |
| | 4 | | |
|-------------------+------------+------------+--------------|
| SL80486DX/DX2/DX4 | 1 & 2, 3 & | 5 & 6 | 3 & 4, JC5 |
| | 4 | | pin1 & JC6 |
| | | | pin1 |
|-------------------+------------+------------+--------------|
| Pentium Overdrive | 1 & 2, 3 & | 5 & 6 | 2 & 3, JC5 |
| | 4 | | pin1 & JC6 |
| | | | pin1 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | JC7 | JC8 |
|-------------------+----------------------+-----------------|
| 80486SX | Open | pins 4 & 5 |
| | | closed |
|-------------------+----------------------+-----------------|
| SL80486SX | 5 & 6 | JC7 pin1 & JC8 |
| | | pin1 |
|-------------------+----------------------+-----------------|
| 80486DX/DX2 | Open | 4 & 5 |
|-------------------+----------------------+-----------------|
| CX486M7 | 2 & 3, 4 & 5 | 4 & 5 |
|-------------------+----------------------+-----------------|
| AMD486DXL | JC6 pin1 & JC7 pin1, | 4 & 5 |
| | JC6 pin5 & JC7 pin5 | |
|-------------------+----------------------+-----------------|
| SL80486DX/DX2/DX4 | 5 & 6 | 4 & 5, JC7 pin1 |
| | | & JC8 pin1 |
|-------------------+----------------------+-----------------|
| Pentium Overdrive | 5 & 6 | 4 & 5, JC7 pin1 |
| | | & JC8 pin1 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JK1 | JK2 | JK3 | JK4 |
|---------+-------+-------+-------+--------------------------|
| 25MHz | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 6, 4 & 9, 5 & 10 |
|---------+-------+-------+-------+--------------------------|
| 33MHz | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 6, 2 & 7, 3 & 8, 4 & |
| | | | | 9, 5 & 10 |
|---------+-------+-------+-------+--------------------------|
| 40MHz | 2 & 3 | 4 & 5 | 2 & 3 | 2 & 7, 5 & 10 |
|---------+-------+-------+-------+--------------------------|
| 50iMHz | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 6, 4 & 9, 5 & 10 |
|---------+-------+-------+-------+--------------------------|
| 50MHz | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 6, 4 & 9 |
|---------+-------+-------+-------+--------------------------|
| 66iMHz | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 6, 2 & 7, 3 & 8, 4 & |
| | | | | 9, 5 & 10 |
|---------+-------+-------+-------+--------------------------|
| 75iMHz | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 6, 4 & 9, 5 & 10 |
|---------+-------+-------+-------+--------------------------|
| 100iMHz | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 6, 2 & 7, 3 & 8, 4 & |
| | | | | 9, 5 & 10 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | J50 |
|------------------+-----------------------------------------|
| 3.3v | pins 1 & 2, 3 & 4, 5 & 6 closed |
|------------------+-----------------------------------------|
| 5v | pins 7 & 8, 9 & 10 11 & 12closed |
|------------------------------------------------------------|
| Note: The mainboard can only support 5v when a 3.3v |
| regulator is not installed. |
+------------------------------------------------------------+