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# CACHE COMPUTERS, INC.
CACHE 486-25/33 EISA (Model 321)
Processor 80486DX
Processor Speed 25/33MHz
Chip Set Intel
Max. Onboard DRAM 64MB
Cache 128/256KB
BIOS Phoenix
Dimensions 355mm x 304mm
I/O Options None
NPU Options 4167
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| External battery | JP4 | Reset | JP18 |
|------------------+----------+-------------------+----------|
| Auxiliary | JP5 | Power LED & | JP19 |
| keyboard | | keylock | |
|------------------+----------+-------------------+----------|
| Speaker | JP17 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|---------------------------------------+---------+----------|
| ยป | Factory configured - do not alter | JP11 | N/A |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 1MB | (4) 256K x | NONE | NONE | NONE |
| | 9 | | | |
|------+-------------+-------------+------------+------------|
| 2MB | (4) 256K x | (4) 256K x | NONE | NONE |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 3MB | (4) 256K x | (4) 256K x | (4) 256K x | NONE |
| | 9 | 9 | 9 | |
|------+-------------+-------------+------------+------------|
| 4MB | (4) 256K x | (4) 256K x | (4) 256K x | (4) 256K x |
| | 9 | 9 | 9 | 9 |
|------+-------------+-------------+------------+------------|
| 4MB | (4) 1M x 9 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 12MB | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 | NONE |
|------+-------------+-------------+------------+------------|
| 16MB | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 |
|------+-------------+-------------+------------+------------|
| 16MB | (4) 4M x 9 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 48MB | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 | NONE |
|------+-------------+-------------+------------+------------|
| 64MB | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| SIMM Size | JP9 | JP10 | JP13 | JP14 |
|-----------+---------------+----------+----------+----------|
| 256KB | pins 1&2 | pins 2&3 | pins 2&3 | pins 2&3 |
| | closed | closed | closed | closed |
|-----------+---------------+----------+----------+----------|
| 1MB | pins 1&2 | pins 1&2 | pins 2&3 | pins 2&3 |
| | closed | closed | closed | closed |
|-----------+---------------+----------+----------+----------|
| 4MB | pins 2&3 | pins 1&2 | pins 1&2 | pins 1&2 |
| | closed | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM SWITCH CONFIGURATION |
|------------------------------------------------------------|
| SIMM Size | SW3/1 | SW3/2 | SW3/3 | SW3/4 |
|------------+-----------+-----------+-----------+-----------|
| 256KB | On | Off | Off | Off |
|------------+-----------+-----------+-----------+-----------|
| 1MB | Off | Off | On | Off |
|------------+-----------+-----------+-----------+-----------|
| 4MB | Off | On | On | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 |
|----------------------------+-------------------------------|
| 128KB | (4) 32K x 8 |
|----------------------------+-------------------------------|
| 256KB | (8) 32K x 8 |
|------------------------------------------------------------|
| Note:Locations and sizes of cache and tag are unknown. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP15 | JP16 | JP20 | JP21 |
|-------+-------------+------------+------------+------------|
| 128KB | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| 256KB | pins 2 & 3 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | Bus speed | SW2/1 | SW2/2 | SW2/3 | SW2/4 |
|-----------+-----------+---------+--------+--------+--------|
| 25MHz | 8.33MHz | On | On | Off | Off |
|-----------+-----------+---------+--------+--------+--------|
| 33MHz | 8.25MHz | Off | On | Off | Off |
+------------------------------------------------------------+