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# EFA CORPORATION
4MHL3G
Processor CXM6/SL80486SX/80486SX/SL80486DX/80486DX/ODP486SX/CXM7/
SL80486DX2/80486DX2/80486DX4/Pentium Overdrive
Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set Unidentified
Max. 128MB
Onboard
DRAM
Cache 64/128/256/512/1024KB
BIOS AMI
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 |
|------------------+----------+-------------------+----------|
| External battery | JP1 | Turbo LED | JP52 |
|------------------+----------+-------------------+----------|
| Turbo switch | JP48 | Turbo key | JP53 |
|------------------+----------+-------------------+----------|
| Reset switch | JP49 | Green PC | JP54 |
| | | connector | |
|------------------+----------+-------------------+----------|
| Power LED & | JP50 | 32-bit VESA local | SL1 - |
| keylock | | bus slots | SL3 |
|------------------+----------+-------------------+----------|
| Speaker | JP51 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Monitor type select EGA | JP2 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Monitor type select | JP2 | pins 1 & 2 |
| | monochrome/VGA | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP4 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | CMOS memory normal operation | JP5 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | JP5 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP12 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP25 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | DX slow down mode disabled | JP37 | Open |
|---+----------------------------------+--------+------------|
| | DX slow down mode enabled | JP37 | Closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP38 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP45 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP55 | Open |
| | alter | | |
|------------------------------------------------------------|
| Note: The location of jumpers JP45 & JP55 are |
| unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+---------------+-------------+------------+----------|
| 1MB | (1) 256K x 36 | NONE | NONE | NONE |
|------+---------------+-------------+------------+----------|
| 2MB | (1) 256K x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+---------------+-------------+------------+----------|
| 2MB | (1) 512K x 36 | NONE | NONE | NONE |
|------+---------------+-------------+------------+----------|
| 4MB | (1) 256K x 36 | (1) 256K x | (1) 512K x | NONE |
| | | 36 | 36 | |
|------+---------------+-------------+------------+----------|
| 4MB | (1) 512K x 36 | (1) 512K x | NONE | NONE |
| | | 36 | | |
|------+---------------+-------------+------------+----------|
| 4MB | (1) 1M x 36 | NONE | NONE | NONE |
|------+---------------+-------------+------------+----------|
| 5MB | (1) 256K x 36 | (1) 1M x 36 | NONE | NONE |
|------+---------------+-------------+------------+----------|
| 6MB | (1) 256K x 36 | (1) 256K x | (1) 1M x | NONE |
| | | 36 | 36 | |
|------+---------------+-------------+------------+----------|
| 6MB | (1) 512K x 36 | (1) 1M x 36 | NONE | NONE |
|------+---------------+-------------+------------+----------|
| 8MB | (1) 256K x 36 | (1) 256K x | (1) 512K x | NONE |
| | | 36 | 36 | |
|------+---------------+-------------+------------+----------|
| 8MB | (1) 512K x 36 | (1) 512K x | (1) 1M x | NONE |
| | | 36 | 36 | |
|------+---------------+-------------+------------+----------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | NONE | NONE |
|------+---------------+-------------+------------+----------|
| 8MB | (1) 2M x 36 | NONE | NONE | NONE |
|------+---------------+-------------+------------+----------|
| 10MB | (1) 256K x 36 | (1) 256K x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|------+---------------+-------------+------------+----------|
| 12MB | (1) 512K x 36 | (1) 512K x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|------+---------------+-------------+------------+----------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+---------------+-------------+------------+----------|
| 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) 4M x 36 | NONE | NONE | NONE |
|------+---------------+-------------+------------+----------|
| 17MB | (1) 256K x 36 | (1) 4M x 36 | NONE | NONE |
|------+---------------+-------------+------------+----------|
| 18MB | (1) 256K x 36 | (1) 256K x | (1) 4M x | NONE |
| | | 36 | 36 | |
|------+---------------+-------------+------------+----------|
| 18MB | (1) 512K x 36 | (1) 4M x 36 | NONE | NONE |
|------+---------------+-------------+------------+----------|
| 20MB | (1) 1M x 36 | (1) 4M x 36 | NONE | NONE |
|------+---------------+-------------+------------+----------|
| 24MB | (1) 512K x 36 | (1) 512K x | (1) 1M x | (1) 4M x |
| | | 36 | 36 | 36 |
|------+---------------+-------------+------------+----------|
| 24MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+---------------+-------------+------------+----------|
| 24MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x | NONE |
| | | | 36 | |
|------+---------------+-------------+------------+----------|
| 32MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 32MB | (1) 8M x 36 | NONE | NONE | NONE |
|-------+-------------+------------+------------+------------|
| 36MB | (1) 512K x | (1) 512K x | (1) 4M x | (1) 4M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 36MB | (1) 1M x 36 | (1) 4M x | (1) 4M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 36MB | (1) 1M x 36 | (1) 8M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 40MB | (1) 1M x 36 | (1) 1M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x | (1) 4M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 48MB | (1) 4M 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 |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 16M x | NONE | NONE | NONE |
| | 36 | | | |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 8M x 36 | (1) 8M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 65MB | (1) 256K x | (1) 16M x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 68MB | (1) 1M x 36 | (1) 16M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 68MB | (1) 1M x 36 | (1) 8M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 72MB | (1) 1M x 36 | (1) 1M x | (1) 16M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 72MB | (1) 1M x 36 | (1) 1M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 4M x 36 | (1) 16M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 4M x 36 | (1) 8M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 4M x 36 | (1) 4M x | (1) 16M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 4M x 36 | (1) 4M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 8M x 36 | (1) 8M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 128MB | (1) 16M x | (1) 16M x | NONE | NONE |
| | 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 | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 128KB | (4) 32K x 8 | NONE | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 512KB | (4) 128K x 8 | NONE | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 1MB | (4) 128K x 8 | (4) 128K x 8 | (1) 128K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP9 | JP27 | JP28 | JP35 | JP41 | JP42 | JP43 |
|-------+------+------+-------+-------+-------+-------+------|
| 64KB | 1 & | 2 & | Open | 2 & 3 | 1 & 2 | 1 & 2 | 1 & |
| | 2 | 3 | | | | | 2 |
|-------+------+------+-------+-------+-------+-------+------|
| 128KB | 2 & | 1 & | 1 & | 2 & 3 | 1 & 2 | 1 & 2 | 2 & |
| | 3 | 2 | 2, 3 | | | | 3 |
| | | | & 4 | | | | |
|-------+------+------+-------+-------+-------+-------+------|
| 256KB | 1 & | 1 & | 2 & | 2 & 3 | 1 & 2 | 2 & 3 | 2 & |
| | 2 | 2 | 3, 4 | | | | 3 |
| | | | & 5 | | | | |
|-------+------+------+-------+-------+-------+-------+------|
| 512KB | 2 & | 1 & | 1 & | 2 & 3 | 2 & 3 | 2 & 3 | 2 & |
| | 3 | 2 | 2, 3 | | | | 3 |
| | | | & 4 | | | | |
|-------+------+------+-------+-------+-------+-------+------|
| 1MB | 1 & | 1 & | 2 & | 1 & 2 | 2 & 3 | 2 & 3 | 2 & |
| | 2 | 2 | 3, 4 | | | | 3 |
| | | | & 5 | | | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP7 | JP11 | JP16 | JP17 | JP18 | JP19 |
|------------+--------+-------+-------+-------+-------+------|
| CXM6 | Open | 1 & 2 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & |
| | | | | | | 3 |
|------------+--------+-------+-------+-------+-------+------|
| SL80486SX | Closed | 2 & 3 | 4 & 5 | 1 & 2 | 2 & 3 | Open |
|------------+--------+-------+-------+-------+-------+------|
| 80486SX | Open | Open | Open | Open | 2 & 3 | Open |
|------------+--------+-------+-------+-------+-------+------|
| ODP486SX | Open | Open | Open | Open | 2 & 3 | Open |
|------------+--------+-------+-------+-------+-------+------|
| SL80486DX | Closed | 2 & 3 | 4 & 5 | 1 & 2 | 2 & 3 | Open |
|------------+--------+-------+-------+-------+-------+------|
| 80486DX | Open | Open | Open | Open | 2 & 3 | Open |
|------------+--------+-------+-------+-------+-------+------|
| CXM7 | Open | 1 & 2 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & |
| | | | | | | 3 |
|------------+--------+-------+-------+-------+-------+------|
| SL80486DX2 | Closed | 2 & 3 | 4 & 5 | 1 & 2 | 2 & 3 | Open |
|------------+--------+-------+-------+-------+-------+------|
| 80486DX2 | Open | Open | Open | Open | 2 & 3 | Open |
|------------+--------+-------+-------+-------+-------+------|
| 80486DX4 | Closed | 2 & 3 | 4 & 5 | 1 & 2 | 2 & 3 | Open |
|------------+--------+-------+-------+-------+-------+------|
| P24T | Open | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & |
| | | | | | | 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed postion. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | JP19 |JP20 |JP21 |JP22 | JP23 |JP29 |JP30 |JP31 |
|----------+------+-----+-----+-----+------+-----+-----+-----|
| CXM6 |2 & 3 |1 & 2|2 & 3|Open | Open |2 & 3|1 & 2|2 & 3|
|----------+------+-----+-----+-----+------+-----+-----+-----|
|SL80486SX | Open |Open |2 & 3|Open | Open |2 & 3|2 & 3|1 & 2|
|----------+------+-----+-----+-----+------+-----+-----+-----|
| 80486SX | Open |Open |2 & 3|Open | Open |2 & 3|2 & 3|1 & 2|
|----------+------+-----+-----+-----+------+-----+-----+-----|
| ODP486SX | Open |Open |1 & 2|2 & 3|Closed|2 & 3|2 & 3|1 & 2|
|----------+------+-----+-----+-----+------+-----+-----+-----|
|SL80486DX | Open |Open |1 & 2|1 & 2|Closed|2 & 3|2 & 3|1 & 2|
|----------+------+-----+-----+-----+------+-----+-----+-----|
| 80486DX | Open |Open |1 & 2|1 & 2|Closed|2 & 3|2 & 3|1 & 2|
|----------+------+-----+-----+-----+------+-----+-----+-----|
| CXM7 |2 & 3 |1 & 2|1 & 2|1 & 2|Closed|2 & 3|1 & 2|2 & 3|
|----------+------+-----+-----+-----+------+-----+-----+-----|
|SL80486DX2| Open |Open |1 & 2|1 & 2|Closed|2 & 3|2 & 3|1 & 2|
|----------+------+-----+-----+-----+------+-----+-----+-----|
| 80486DX2 | Open |Open |1 & 2|1 & 2|Closed|2 & 3|2 & 3|1 & 2|
|----------+------+-----+-----+-----+------+-----+-----+-----|
| 80486DX4 | Open |Open |1 & 2|1 & 2|Closed|2 & 3|2 & 3|1 & 2|
|----------+------+-----+-----+-----+------+-----+-----+-----|
| P24T |1 & 2 |2 & 3|1 & 2|2 & 3|Closed|2 & 3|2 & 3|2 & 3|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed postion. The |
|location fof JP29 is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | jp6 | jp26 |
|------------------+--------------------+--------------------|
| All CPU types | Open | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 80486DX4 only | pins 1 & 2 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP8 | JP14 | JP15 |
|---------------+--------------+--------------+--------------|
| All CPU types | Open | Open | Open |
|---------------+--------------+--------------+--------------|
| P24D only | Closed | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP10 |
|----------------------------+-------------------------------|
| All CPU types | Open |
|----------------------------+-------------------------------|
| CX486DX-40 | pins 2 & 3 closed |
|----------------------------+-------------------------------|
| CX486DX2-50 | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP24 |
|-------------------------------+----------------------------|
| All CPU types | Open |
|-------------------------------+----------------------------|
| CX M6/M7 CPU | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP32 | JP33 | JP34 |
|---------+----------------+----------------+----------------|
| 20MHz | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 25MHz | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 33MHz | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 40MHz | pins 1 & 2 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 50iMHz | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 50MHz | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 66iMHz | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 75iMHz | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 100iMHz | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | JP13 | JP44 |
|------------+--------------------------+--------------------|
| 3.3v | pins 2 & 3, 5 & 6 closed | pins 1 & 2 closed |
|------------+--------------------------+--------------------|
| 5.0v | pins 1 & 2, 4 & 5 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA WAIT STATE CONFIGURATION |
|------------------------------------------------------------|
| Wait states | JP40 |
|----------------------------+-------------------------------|
| 0 wait states | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 1 wait state | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BUS SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | JP39 |
|----------------------------+-------------------------------|
| <= 33MHz | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| > 33MHz | pins 2 & 3 closed |
+------------------------------------------------------------+