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# EFA CORPORATION
ECA 34M50HL
Processor 80386DX/80486DX/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 254mm x 218mm
I/O Options 32-bit VESA local bus slot
NPU Options 80387
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| External battery | J1 | Power LED & | J10 |
| | | keylock | |
|------------------+----------+-------------------+----------|
| Speaker | J7 | Turbo switch | J11 |
|------------------+----------+-------------------+----------|
| Turbo LED | J8 | 32-bit VESA local | S1 |
| | | bus slot | |
|------------------+----------+-------------------+----------|
| Reset switch | J9 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|------------------------------------+--------+--------------|
| » | BIOS type select 27256/27512 | J2 | pins 2 & 3 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | BIOS type select 271024 | J2 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| » | Battery type select internal | W1 | Closed |
|---+--------------------------------+--------+--------------|
| | Battery type select external | W1 | Open |
|---+--------------------------------+--------+--------------|
| » | Normal operation | W2 | Open |
|---+--------------------------------+--------+--------------|
| | Self test | W2 | Closed |
|---+--------------------------------+--------+--------------|
| » | Monitor type select monochrome | W3 | Closed |
|---+--------------------------------+--------+--------------|
| | Monitor type select color | W3 | Open |
|---+--------------------------------+--------+--------------|
| » | CMOS memory normal operations | W12 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | CMOS memory clear | W12 | pins 2 & 3 |
| | | | 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 | Bank 0 | Bank 1 | TAG (U19 & U36) |
|----------+---------------+---------------+-----------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (2) 8K x 8 |
|----------+---------------+---------------+-----------------|
| 128KB | (4) 32K x 8 | NONE | (2) 32K x 8 |
|----------+---------------+---------------+-----------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (2) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | W4 | W5 | W6 | W7 | W8 | W9 | W10 | W11 |
|------+------+------+-----+-----+------+------+------+------|
| 64KB |1 & 2 | Open |1 & 2|1 & 2| Open | Open | Open | Open |
|------+------+------+-----+-----+------+------+------+------|
|128KB |2 & 3 |1 & 2 |2 & 3|1 & 2|Closed| Open |Closed| Open |
|------+------+------+-----+-----+------+------+------+------|
|256KB |1 & 2 |2 & 3 |2 & 3|2 & 3|Closed|Closed|Closed|Closed|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | J6 | J13 | SW2/1 | SW2/2 | SW2/3 | SW2/4 |
|------------+-------+-------+-------+-------+-------+-------|
| 80386DX | 2 & 3 | 1 & 2 | On | On | On | On |
|------------+-------+-------+-------+-------+-------+-------|
| 80486SX-20 | 1 & 2 | 1 & 2 | Off | Off | Off | Off |
|------------+-------+-------+-------+-------+-------+-------|
| 80486SX-25 | 1 & 2 | 1 & 2 | Off | Off | Off | Off |
|------------+-------+-------+-------+-------+-------+-------|
| 80487SX | 1 & 2 | 1 & 2 | Off | Off | Off | Off |
|------------+-------+-------+-------+-------+-------+-------|
| 80486DX | 1 & 2 | 2 & 3 | Off | Off | Off | Off |
|------------+-------+-------+-------+-------+-------+-------|
| 80486DX2 | 1 & 2 | 2 & 3 | Off | Off | Off | Off |
|------------------------------------------------------------|
| Note:Pins designated should be in the closed position |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type |SW2/5 |SW2/6 |SW2/7 |SW3/1 |SW3/2 |SW3/3 |SW3/4 |
|-----------+------+------+------+------+------+------+------|
| 80386DX | On | On | On | On | On | Off | Off |
|-----------+------+------+------+------+------+------+------|
|80486SX-20 | Off | Off | Off | Off | Off | On | On |
|-----------+------+------+------+------+------+------+------|
|80486SX-25 | Off | Off | Off | Off | Off | On | Off |
|-----------+------+------+------+------+------+------+------|
| 80487SX | Off | Off | Off | On | On | Off | Off |
|-----------+------+------+------+------+------+------+------|
| 80486DX | Off | Off | Off | On | On | Off | Off |
|-----------+------+------+------+------+------+------+------|
| 80486DX2 | Off | Off | Off | On | On | Off | Off |
|------------------------------------------------------------|
|Note:Pins designated should be in the closed position |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE & SPEED CONFIGURATION |
|------------------------------------------------------------|
| Type | Speed | SW1/1 | SW1/2 | SW1/3 | SW1/4 |
|-------------+---------+---------+--------+--------+--------|
| 80486DX2-66 | 33MHz | On | Off | On | On |
|-------------+---------+---------+--------+--------+--------|
| 80486DX2-50 | 25MHz | On | On | Off | On |
|-------------+---------+---------+--------+--------+--------|
| ODP486SX-66 | 33MHz | On | Off | On | On |
|-------------+---------+---------+--------+--------+--------|
| ODP486SX-50 | 25MHz | On | On | Off | On |
|-------------+---------+---------+--------+--------+--------|
| 80486DX-50 | 50MHz | Off | Off | Off | Off |
|-------------+---------+---------+--------+--------+--------|
| 80486DX-33 | 33MHz | Off | Off | Off | On |
|-------------+---------+---------+--------+--------+--------|
| 80486DX-25 | 25MHz | On | On | Off | On |
|-------------+---------+---------+--------+--------+--------|
| 80487SX-25 | 25MHz | On | On | Off | On |
|-------------+---------+---------+--------+--------+--------|
| 80487SX-20 | 40MHz | Off | Off | On | Off |
|-------------+---------+---------+--------+--------+--------|
| 80486SX-25 | 25MHz | On | On | Off | On |
|-------------+---------+---------+--------+--------+--------|
| 80486SX-20 | 40MHz | Off | Off | On | Off |
|-------------+---------+---------+--------+--------+--------|
| 80386DX-33 | 66MHz | Off | Off | Off | On |
|-------------+---------+---------+--------+--------+--------|
| 80386DX-20 | 44MHz | On | Off | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA WAIT STATE CONFIGURATION |
|------------------------------------------------------------|
| Wait state | J3 | J4 | J5 |
|---------------+---------------+---------------+------------|
| Auto detect | Closed | Open | Open |
|---------------+---------------+---------------+------------|
| 0 | Open | Open | Open |
|---------------+---------------+---------------+------------|
| 1 | Open | Closed | Open |
+------------------------------------------------------------+