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# EFA CORPORATION
34M50HL2
Processor CX486DLC/80486SX/80486DX/ODP486SX/80486DX2
Processor Speed 16/20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set UMC
Max. Onboard 32MB
DRAM
Cache 64/128/256KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options 32-bit VESA local bus slots (2)
NPU Options 80387DX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| External battery | J1 | Reset switch | J10 |
|------------------+----------+-------------------+----------|
| Turbo LED | J7 | Turbo switch | J11 |
|------------------+----------+-------------------+----------|
| Speaker | J8 | 32-bit VESA Local | S1 |
| | | bus slot | |
|------------------+----------+-------------------+----------|
| Power LED & | J9 | 32-bit VESA Local | S2 |
| keylock | | bus slot | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|------------------------------------+--------+--------------|
| » | CMOS memory normal operation | W1 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | CMOS memory clear | W1 | pins 2 & 3 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| » | Battery select internal | W2 | Closed |
|---+--------------------------------+--------+--------------|
| | Battery select external | W2 | Open |
|---+--------------------------------+--------+--------------|
| » | Monitor type select color | W3 | Open |
|---+--------------------------------+--------+--------------|
| | Monitor type select monochrome | W3 | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 1MB | (4) 256K x 9 | NONE |
|------------------+--------------------+--------------------|
| 2MB | (4) 256K x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 4MB | (4) 1M x 9 | NONE |
|------------------+--------------------+--------------------|
| 5MB | (4) 256K x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 20MB | (4) 1M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Max | Bank 0 | Bank 1 | TAG |
| | Cachable | | | |
|-------+-------------+------------+------------+------------|
| 64KB | 16MB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 |
|-------+-------------+------------+------------+------------|
| 128KB | 32MB | (4) 32K x | NONE | (1) 8K x 8 |
| | | 8 | | |
|-------+-------------+------------+------------+------------|
| 256KB | 64MB | (4) 32K x | (4) 32K x | (1) 32K x |
| | | 8 | 8 | 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | W4 | W5 | W6 | W7 | W8 | W9 | W10 | W11 |
|------+------+------+-----+-----+------+------+------+------|
| 64KB |1 & 2 |1 & 2 |1 & 2|Open | Open | Open | Open | Open |
|------+------+------+-----+-----+------+------+------+------|
|128KB |2 & 3 |1 & 2 |2 & 3|1 & 2| Open |Closed| Open |Closed|
|------+------+------+-----+-----+------+------+------+------|
|256KB |2 & 3 |2 & 3 |1 & 2|2 & 3|Closed|Closed|Closed|Closed|
|------------------------------------------------------------|
|Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | J2 | J6 | J13 | J14 | J15 | J16 | J17 | JP1 | JP3 |
|--------+----+----+-----+-----+-----+-----+-----+-----+-----|
|CX486DLC|1 & |2 & |1 & 2|2 & 3|2 & 3|1 & 2|1 & 2|1 & 2|2 & 3|
| | 2 | 3 | | | | | | | |
|--------+----+----+-----+-----+-----+-----+-----+-----+-----|
|80486SX |2 & |2 & |2 & 3|1 & 2|2 & 3|2 & 3|1 & 2|1 & 2|2 & 3|
| | 3 | 3 | | | | | | | |
|--------+----+----+-----+-----+-----+-----+-----+-----+-----|
|80486DX |2 & |2 & |2 & 3|1 & 2|2 & 3|2 & 3|1 & 2|1 & 2|2 & 3|
| | 3 | 3 | | | | | | | |
|--------+----+----+-----+-----+-----+-----+-----+-----+-----|
|ODP486SX|2 & |2 & |2 & 3|1 & 2|2 & 3|2 & 3|1 & 2|1 & 2|2 & 3|
| | 3 | 3 | | | | | | | |
|--------+----+----+-----+-----+-----+-----+-----+-----+-----|
|80486DX2|2 & |2 & |2 & 3|1 & 2|2 & 3|2 & 3|1 & 2|1 & 2|2 & 3|
| | 3 | 3 | | | | | | | |
|------------------------------------------------------------|
|Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA LOCAL BUS IDE CONTROLLER CONFIGURATION |
|------------------------------------------------------------|
| Type | J6 | J15 |
|--------------------+-------------------+-------------------|
| Promise Tech. | pins 1 & 2 closed | pins 1 & 2 closed |
| (chip #PDC2013A) | | |
|--------------------+-------------------+-------------------|
| Any other | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CONT.) |
|------------------------------------------------------------|
| Type |Package|SW3/1 |SW3/2 |SW3/3 |SW3/4 |SW3/5 |SW3/6 |
|----------+-------+------+------+------+------+------+------|
| CX486DLC | PGA | Off | On | On | Off | Off | Off |
|----------+-------+------+------+------+------+------+------|
| 80486SX | PGA | Off | Off | Off | On | On | Off |
|----------+-------+------+------+------+------+------+------|
| 80486SX | PQFP | Off | Off | Off | Off | Off | Off |
|----------+-------+------+------+------+------+------+------|
| 80486DX | PGA | Off | On | On | Off | Off | Off |
|----------+-------+------+------+------+------+------+------|
| 80486DX | PQFP | On | Off | Off | Off | Off | On |
|----------+-------+------+------+------+------+------+------|
| ODP486SX | PGA | Off | On | On | Off | Off | Off |
|----------+-------+------+------+------+------+------+------|
| 80486DX2 | PGA | Off | On | On | Off | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CONT.) |
|------------------------------------------------------------|
| Type | SW2/1 | SW2/2 | SW2/3 | SW2/4 | SW2/5 | SW2/6 |
|-----------+--------+-------+-------+-------+-------+-------|
| CX486DLC | On | On | On | On | On | On |
|-----------+--------+-------+-------+-------+-------+-------|
| 80486SX | Off | Off | Off | Off | Off | Off |
|-----------+--------+-------+-------+-------+-------+-------|
| 80486DX | Off | Off | Off | Off | Off | Off |
|-----------+--------+-------+-------+-------+-------+-------|
| ODP486SX | Off | Off | Off | Off | Off | Off |
|-----------+--------+-------+-------+-------+-------+-------|
| 80486DX2 | Off | Off | Off | Off | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | J12 |
|------------------------------+-----------------------------|
| ODP486SX enabled | pins 1 & 2 closed |
|------------------------------+-----------------------------|
| 80486SX enabled | pins 2 & 3 closed |
|------------------------------+-----------------------------|
| 80486DX enabled | pins 2 & 3 closed |
|------------------------------+-----------------------------|
| 80486DX2 enabled | pins 2 & 3 closed |
|------------------------------------------------------------|
| Note:This only applies when the 80486SX/DX PQFP is |
| disabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU PIN NUMBER CONFIGURATION |
|------------------------------------------------------------|
| Type | Pins | J3 |
|--------------------+------------------+--------------------|
| CX486DLC | 64 | N/A |
|--------------------+------------------+--------------------|
| 80486SX | 168 | Open |
|--------------------+------------------+--------------------|
| ODP486SX | 169 | pins 2 & 3 closed |
|--------------------+------------------+--------------------|
| ODP486SX | 168 | pins 1 & 2 closed |
|--------------------+------------------+--------------------|
| 80486DX | 168 | pins 1 & 2 closed |
|--------------------+------------------+--------------------|
| 80486DX2 | 168 | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU | Speed | OSC. |SW1/1 |SW1/2 |SW1/3 |SW1/4 |SW3/4 |
|---------+--------+------+------+------+------+------+------|
|CX486DLC | 16MHz |16MHz | On | On | On | On | Off |
|---------+--------+------+------+------+------+------+------|
|CX486DLC | 20MHz |20MHz | On | On | On | Off | Off |
|---------+--------+------+------+------+------+------+------|
|CX486DLC | 16MHz |32MHz | Off | Off | On | On | Off |
|---------+--------+------+------+------+------+------+------|
|CX486DLC | 33MHz |66MHz | Off | Off | Off | On | Off |
|---------+--------+------+------+------+------+------+------|
|CX486DLC | 40MHz |80MHz | On | Off | Off | Off | Off |
|---------+--------+------+------+------+------+------+------|
| 80486SX | 20MHz |40MHz | Off | Off | On | Off | On |
|---------+--------+------+------+------+------+------+------|
| 80486SX | 25MHz |25MHz | On | On | Off | On | On |
|---------+--------+------+------+------+------+------+------|
| 80487SX | 20MHz |40MHz | Off | Off | On | Off | N/A |
|---------+--------+------+------+------+------+------+------|
| 80487SX | 25MHz |25MHz | On | On | Off | On | N/A |
|---------+--------+------+------+------+------+------+------|
| 80486DX | 25MHz |25MHz | On | On | Off | On | Off |
|---------+--------+------+------+------+------+------+------|
| 80486DX | 33MHz |33MHz | On | Off | On | On | Off |
|---------+--------+------+------+------+------+------+------|
| 80486DX | 50MHz |50MHz | Off | Off | Off | Off | Off |
|---------+--------+------+------+------+------+------+------|
|ODP486SX |50i MHz |25MHz | On | On | Off | On | Off |
|---------+--------+------+------+------+------+------+------|
|ODP486SX |66i MHz |33MHz | On | Off | On | On | Off |
|---------+--------+------+------+------+------+------+------|
|80486DX2 |50i MHz |25MHz | On | On | Off | On | Off |
|---------+--------+------+------+------+------+------+------|
|80486DX2 |66i MHz |33MHz | On | Off | On | On | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| NPU CONFIGURATION |
|------------------------------------------------------------|
| 80387DX | SW2/switch 7 |
|----------------------------+-------------------------------|
| Disabled | Off |
|----------------------------+-------------------------------|
| Enabled | On |
|------------------------------------------------------------|
| Note: The 80387DX can only be used with a CX486DLC CPU. |
| |
| The NPU must be disabled if any other CPU is used |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA WAIT STATE/BUS SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | Wait states | J4 (ID2) | J5 (ID3) |
|-----------+---------------+-------------------+------------|
| £ 33MHz | 0 wait states | pins 1 & 2 closed | pins 1 & 2 |
| | | | closed |
|-----------+---------------+-------------------+------------|
| > 33MHz | 1 wait state | pins 2 & 3 closed | pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+