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# AMERICAN DIGICOM CORPORATION
DIGIS-486E
Processor 80486SX/80487SX/80486DX
Processor Speed 20/25/33/50MHz
Chip Set OPTI
Max. Onboard DRAM 128MB
SRAM 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 |
|---------------------+----------+----------------+----------|
| Speaker | J4 | Reset switch | S9 |
|---------------------+----------+----------------+----------|
| Power LED & keylock | J5 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | EISA cards configured as ISA | JP1 | Closed |
|---+----------------------------------+--------+------------|
| | EISA cards configured as EISA | JP1 | Open |
|---+----------------------------------+--------+------------|
| » | I/O bus speed select synchronous | JP4 | pins 1 & 2 |
| | with chipset | | closed |
|---+----------------------------------+--------+------------|
| | I/O bus speed select 8MHz | JP4 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | JP5 | Closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | JP5 | Open |
|---+----------------------------------+--------+------------|
| » | Reserved for future applications | JP7 | N/A |
|---+----------------------------------+--------+------------|
| » | Clock frequency select single | JP9 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Clock frequency select double | JP9 | pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 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 | U51 | U52 | U53 | U66 |
|-------+---------+--------+-------+--------+--------+-------|
| 64KB | (4) 8K | (4) 8K | (1) | (1) 8K | NONE | (1) |
| | x 8 | x 8 | 64K x | x 8 | | 16K x |
| | | | 1 | | | 1 |
|-------+---------+--------+-------+--------+--------+-------|
| 128KB | (4) 32K | NONE | (1) | (1) 8K | NONE | (1) |
| | x 8 | | 64K x | x 8 | | 16K x |
| | | | 1 | | | 1 |
|-------+---------+--------+-------+--------+--------+-------|
| 256KB | (4) 32K | (4) | (1) | (1) 8K | (1) 8K | (1) |
| | x 8 | 32K x | 64K x | x 8 | x 8 | 16K x |
| | | 8 | 1 | | | 1 |
|-------+---------+--------+-------+--------+--------+-------|
| 512KB | (4) | NONE | (1) | (1) | NONE | (1) |
| | 128K x | | 64K x | 32K x | | 64K x |
| | 8 | | 1 | 8 | | 1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP11 | JP12 | JP13 | JP14 | JP15 | JP16 |
|-------+--------+--------+--------+--------+--------+-------|
| 64KB | Open | Open | Open | Open | Open | Open |
|-------+--------+--------+--------+--------+--------+-------|
| 128KB | Open | Open | Closed | Open | Closed | Open |
|-------+--------+--------+--------+--------+--------+-------|
| 256KB | Open | Closed | Closed | Closed | Closed | Open |
|-------+--------+--------+--------+--------+--------+-------|
| 512KB | Closed | Closed | Closed | Closed | Closed |Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP8 | JP10 |
|------------+--------------------------+--------------------|
| 80486SX | pins 2 & 3 closed | open |
|------------+--------------------------+--------------------|
| 80487SX | pins 1 & 2, 3 & 4 closed | pins 1 & 2 closed |
|------------+--------------------------+--------------------|
| 80486DX | pins 1 & 2, 3 & 4 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP2 | JP3 |
|-------------------+--------------------+-------------------|
| 25MHz | Open | Open |
|-------------------+--------------------+-------------------|
| 33MHz | Closed | Open |
|-------------------+--------------------+-------------------|
| 40MHz | Open | Closed |
|-------------------+--------------------+-------------------|
| 50MHz | Closed | Closed |
+------------------------------------------------------------+