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# OCEAN INFORMATION SYSTEMS, INC.
DRAGON EISA 486
Processor 80486DX
Processor Speed 50MHz
Chip Set OPTI
Max. onboard DRAM 128MB
SRAM Cache 64/128/256/512KB
BIOS AMI
Dimensions 330mm x 215mm
I/O Options None
NPU Options 4167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------+-----------+----------------------+----------|
| Speaker | J4 | Reset switch | S9 |
|--------------+-----------+----------------------+----------|
| Power LED & | J5 | CPU heatsink fan | JP22 |
| keylock | | (+5VDC) | |
|------------------------------------------------------------|
| Note:The location of JP22 is unknown and may be labeled |
| JP17 on the board. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|----------------------------------+--------+----------------|
| » | Factory configured - do not | JP1 | Closed |
| | alter | | |
|---+------------------------------+--------+----------------|
| » | Factory configured - do not | JP2 | Closed |
| | alter | | |
|---+------------------------------+--------+----------------|
| » | Factory configured - do not | JP3 | pins 1 & 2 |
| | alter | | closed |
|---+------------------------------+--------+----------------|
| » | Monitor type select color | JP4 | Closed |
|---+------------------------------+--------+----------------|
| | Monitor type select | JP4 | Open |
| | monochrome | | |
|---+------------------------------+--------+----------------|
| » | Factory configured - do not | JP6 | Open |
| | alter | | |
|---+------------------------------+--------+----------------|
| » | Factory configured - do not | JP7 | pins 1 & 2 and |
| | alter | | 3 & 4 closed |
|---+------------------------------+--------+----------------|
| » | Factory configured - do not | JP8 | pins 1 & 2 |
| | alter | | closed |
|---+------------------------------+--------+----------------|
| » | Factory configured - do not | JP9 | pins 2 & 3 |
| | alter | | 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Dirty | TAG | TAG | TAG |
| | | | (U49) | (U50) | (U51) | (U64) |
|-------+--------+--------+--------+--------+-------+--------|
| 64KB | (4) 8K | (4) 8K | (1) | (1) 8K | None | (1) |
| | x 8 | x 8 | 16K x | x 8 | | 16K x |
| | | | 1 | | | 1 or |
| | | | | | | 64K x |
| | | | | | | 1 |
|-------+--------+--------+--------+--------+-------+--------|
| 128KB | (4) | NONE | (1) | (1) 8K | None | (1) |
| | 32K x | | 16K x | x 8 | | 16K x |
| | 8 | | 1 | | | 1 or |
| | | | | | | 64K x |
| | | | | | | 1 |
|-------+--------+--------+--------+--------+-------+--------|
| 256KB | (4) | (4) | (1) | (1) 8K | (1) | (1) |
| | 32K x | 32K x | 16K x | x 8 | 8K x | 16K x |
| | 8 | 8 | 1 | | 8 | 1 or |
| | | | | | | 64K x |
| | | | | | | 1 |
|-------+--------+--------+--------+--------+-------+--------|
| 512KB | (4) | NONE | (1) | (1) | None | (1) |
| | 128K x | | 16K x | 32K x | | 64K x |
| | 8 | | 1 | 8 | | 1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Jumper | 64KB | 128KB | 256KB | 512KB |
|--------+------------+------------+------------+------------|
| JP5 | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed | closed |
|--------+------------+------------+------------+------------|
| JP10 | Open | Open | Open | Closed |
|--------+------------+------------+------------+------------|
| JP11 | Open | Open | Closed | Closed |
|--------+------------+------------+------------+------------|
| JP12 | Open | Closed | Closed | Closed |
|--------+------------+------------+------------+------------|
| JP13 | Open | Open | Closed | Closed |
|--------+------------+------------+------------+------------|
| JP14 | Open | Closed | Closed | Closed |
|--------+------------+------------+------------+------------|
| JP15 | Open | Open | Open | Closed |
+------------------------------------------------------------+