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# ZIDA TECHNOLOGIES, LTD.
OPTI 386SX
Processor 80386SX/CX486SLC
Processor Speed 16/20/25MHZ
Chip Set OPTI
Max. Onboard DRAM 16MB
Cache 16/32/64/128KB
BIOS AMI
Dimensions 170mm x 220mm
I/O Options 32-bit proprietary local bus slot
NPU Options 80387SX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+----------+----------------------+----------|
| External | J1 | Turbo LED | J15 |
| battery | | | |
|---------------+----------+----------------------+----------|
| Power LED & | J12 | Turbo Switch | J16 |
| Keylock | | | |
|---------------+----------+----------------------+----------|
| Reset Switch | J13 | 32-bit proprietary | S1 |
| | | local bus slot | |
|---------------+----------+----------------------+----------|
| Speaker | J14 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|------------------------------------+----------+------------|
| » | Local bus signal select TTL | J2 | pins 1 & 2 |
| | level | | closed |
|---+--------------------------------+----------+------------|
| | Local bus signal select Tri | J2 | pins 2 & 3 |
| | state level | | closed |
|---+--------------------------------+----------+------------|
| » | Monitor type select color | J3 | Open |
|---+--------------------------------+----------+------------|
| | Monitor type select monochrome | J3 | Closed |
|---+--------------------------------+----------+------------|
| » | CPU type select Intel/AMD | J4 & J11 | Open |
|---+--------------------------------+----------+------------|
| | CPU type select Cyrix | J4 & J11 | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 512KB | (2) 256K x 9 | NONE |
|------------------+--------------------+--------------------|
| 1MB | (2) 256K x 9 | (2) 256K x 9 |
|------------------+--------------------+--------------------|
| 1.5MB | (2) 1M x 9 | (2) 256K x 9 |
|------------------+--------------------+--------------------|
| 2MB | (2) 1M x 9 | NONE |
|------------------+--------------------+--------------------|
| 4MB | (2) 1M x 9 | (2) 1M x 9 |
|------------------+--------------------+--------------------|
| 8MB | (2) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 8.5MB | (2) 4M x 9 | (2) 256K x 9 |
|------------------+--------------------+--------------------|
| 10MB | (2) 4M x 9 | (2) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (2) 4M x 9 | (2) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Tag (U26) | Tag (U27) |
|-------+-------------+------------+------------+------------|
| 16KB | (2) 8K x 8 | None | (1) 8K x 8 | NONE |
|-------+-------------+------------+------------+------------|
| 32KB | (2) 8K x 8 | (2) 8K x 8 | (1) 8K x 8 | NONE |
|-------+-------------+------------+------------+------------|
| 64KB | (2) 32K x 8 | NONE | (1) 8K x 8 | NONE |
|-------+-------------+------------+------------+------------|
| 128KB | (2) 32K x 8 | (2) 32K x | (1) 8K x 8 | (1) 8K x 8 |
| | | 8 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
|Size | J5 | J6 | J7 | J8 | J9 | J10 |
|-----+---------------+----------+------+------+------+------|
|16KB | pins 2 & 3 |pins 2 & 3| Open | Open | Open | Open |
| | closed | closed | | | | |
|-----+---------------+----------+------+------+------+------|
|32KB | pins 2 & 3 |pins 2 & 3| Open |Closed| Open | Open |
| | closed | closed | | | | |
|-----+---------------+----------+------+------+------+------|
|64KB | pins 1 & 2 |pins 2 & 3|Closed|Closed|Closed| Open |
| | closed | closed | | | | |
|-----+---------------+----------+------+------+------+------|
|128KB| pins 1 & 2 |pins 1 & 2|Closed|Closed|Closed|Closed|
| | closed | closed | | | | |
+------------------------------------------------------------+