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# AMERICAN DIGITAL DATA ASSOCIATES
EA-6580
Processor 80486SX/80487SX/80486DX/80486DX2
Processor Speed 20/25/33/50(internal)/50/66(internal)MHz
Chip Set SIS
Max. Onboard DRAM 128MB
Cache 64/128/256/512KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options None
NPU Options 4167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------+----------+---------------------+----------|
| Reset switch | CN1 | Speaker | CN4 |
|----------------+----------+---------------------+----------|
| Turbo LED | CN2 | Power LED & keylock | CN5 |
|----------------+----------+---------------------+----------|
| Turbo switch | CN3 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|------------------------------------+--------+--------------|
| » | CPU speed select 33MHz | JP11 | pins 2 & 3 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | CPU speed select 50MHz | JP11 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| » | Monitor type select monochrome | JP12 | Open |
|---+--------------------------------+--------+--------------|
| | Monitor type select color | JP12 | 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 |
|------------------+--------------------+--------------------|
| 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 |
|------------------+--------------------+--------------------|
| 64MB | (4) 16M x 9 | NONE |
|------------------+--------------------+--------------------|
| 128MB | (4) 16M x 9 | (4) 16M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG (U47) | Dirty Bit |
| | | | | (U32) |
|-------+-------------+------------+------------+------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 | (1) 8K x 8 |
|-------+-------------+------------+------------+------------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 | (1) 8K x 8 |
|-------+-------------+------------+------------+------------|
| 256KB | (4) 32K x 8 | (4) 32K x | (1) 32K x | (1) 32K x |
| | | 8 | 8 | 8 |
|-------+-------------+------------+------------+------------|
| 512KB | (4) 128K x | NONE | (1) 32K x | (1) 32K x |
| | 8 | | 8 | 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP1 | JP2 | JP3 | JP4 | JP5 | JP6 | JP7 | JP8 |
|-------+------+------+-----+-----+-----+-----+-----+--------|
| 64KB | 1 & | 1 & | 1 & | 1 & | 1 & | 1 & | 2 & | Open |
| | 2 | 2 | 2 | 2 | 2 | 2 | 3 | |
|-------+------+------+-----+-----+-----+-----+-----+--------|
| 128KB | 2 & | 1 & | 1 & | 2 & | 1 & | 1 & | 1 & | Closed |
| | 3 | 2 | 2 | 3 | 2 | 2 | 2 | |
|-------+------+------+-----+-----+-----+-----+-----+--------|
| 256KB | 2 & | 2 & | 1 & | 2 & | 2 & | 1 & | 4 & | Closed |
| | 3 | 3 | 2 | 3 | 3 | 2 | 5 | |
|-------+------+------+-----+-----+-----+-----+-----+--------|
| 512KB | 2 & | 2 & | 2 & | 2 & | 2 & | 2 & | 1 & | Closed |
| | 3 | 3 | 3 | 3 | 3 | 3 | 2 | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP9 | JP10 |
|------------+--------------------------+--------------------|
| 80486SX | pins 2 & 4 closed | Open |
|------------+--------------------------+--------------------|
| 80487SX | pins 1 & 2, 3 & 4 closed | pins 2 & 3 closed |
|------------+--------------------------+--------------------|
| 80486DX | pins 1 & 2, 3 & 4 closed | pins 1 & 2 closed |
|------------+--------------------------+--------------------|
| 80486DX2 | pins 1 & 2, 3 & 4 closed | pins 1 & 2 closed |
+------------------------------------------------------------+