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# ZIDA TECHNOLOGIES, LTD.
OPTI 3486
Processor 80386DX/80486SX/80487SX/80486DX/80486DX2
Processor Speed 20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set OPTI
Max. Onboard DRAM 32MB
SRAM Cache 64/128/256KB
BIOS AMI
Dimensions 220mm x 220mm
I/O Options None
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+----------+----------------------+----------|
| Reset switch | J1 | Speaker | J4 |
|---------------+----------+----------------------+----------|
| Turbo LED | J3 | Power LED & keylock | J5 |
|------------------------------------------------------------|
| Note:The Locations of connectors J1, J3, J4, and J5 are |
| unknown. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|----------------------------------------+--------+----------|
| ยป | Factory configured - do not alter | P2 | Unknown |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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) 4M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Cache | Location | TAG |
|------------+---------------+---------------+---------------|
| 64KB | (8) 8K x 8 | Banks 0 & 1 | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 128KB | (4) 32K x 8 | Bank 0 | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (8) 32K x 8 | Banks 0 & 1 | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | P3 | P5 | P6 | P7 | P8 | P9 |
|------+-----------------+-------+------+------+------+------|
| 64KB |pins 2 & 3 closed| Open | Open | Open | Open | Open |
|------+-----------------+-------+------+------+------+------|
|128KB |pins 1 & 2 closed| Open | Open |Closed|Closed|Closed|
|------+-----------------+-------+------+------+------+------|
|256KB |pins 2 & 3 closed|Closed |Closed|Closed|Closed|Closed|
+------------------------------------------------------------+
+------------------------------------------------------------+
| CONFIGURATION FOR 80386DX CPU |
|------------------------------------------------------------|
| Jumper | 33MHz | 40MHz |
|------------------+--------------------+--------------------|
| P4 | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| P12 | N/A | N/A |
|------------------+--------------------+--------------------|
| P13 | N/A | N/A |
|------------------+--------------------+--------------------|
| P14 | N/A | N/A |
|------------------+--------------------+--------------------|
| P25 | pins 2 & 3 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| P28 | Open | Open |
|------------------+--------------------+--------------------|
| P30 | Closed | Open |
|------------------+--------------------+--------------------|
| P31 | Closed | Open |
|------------------+--------------------+--------------------|
| P32 | Open | Closed |
|------------------+--------------------+--------------------|
| P33 | Open | Open |
|------------------+--------------------+--------------------|
| P39 | Closed | Open |
|------------------+--------------------+--------------------|
| P97 | Closed | Closed |
|------------------+--------------------+--------------------|
| P100 | pins 1 & 2 closed | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CONFIGURATION FOR 80486SX, 80486DX & 80486DX2 CPU |
|------------------------------------------------------------|
|Jumper| 20MHz | 25MHz | 33MHz | 50iMHz | 50MHz | 66iMHz |
|------+--------+--------+--------+--------+--------+--------|
| P4 |pins 2 &|pins 2 &|pins 2 &|pins 2 &|pins 2 &|pins 2 &|
| | 3 | 3 | 3 | 3 | 3 | 3 |
|------+--------+--------+--------+--------+--------+--------|
| P12 |pins 2 &|pins 2 &|pins 1 &|pins 1 &|pins 1 &|pins 1 &|
| | 3 | 3 | 2 | 2 | 2 | 2 |
|------+--------+--------+--------+--------+--------+--------|
| P13 | Open | Open |pins 1 &|pins 1 &|pins 1 &|pins 1 &|
| | | | 2 | 2 | 2 | 2 |
|------+--------+--------+--------+--------+--------+--------|
| P14 | Open | Open | Closed | Closed | Closed | Closed |
|------+--------+--------+--------+--------+--------+--------|
| P25 |pins 1 &|pins 1 &|pins 1 &|pins 1 &|pins 1 &|pins 1 &|
| | 2 | 2 | 2 | 2 | 2 | 2 |
|------+--------+--------+--------+--------+--------+--------|
| P28 | Closed | Closed | Closed | Closed | Closed | CLosed |
|------+--------+--------+--------+--------+--------+--------|
| P30 | Open | Closed | Closed | Closed | Closed | Closed |
|------+--------+--------+--------+--------+--------+--------|
| P31 | Closed | Open | Closed | Open | Open | Closed |
|------+--------+--------+--------+--------+--------+--------|
| P32 | Closed | Closed | Open | Closed | Closed | Open |
|------+--------+--------+--------+--------+--------+--------|
| P33 | Closed | Closed | Closed | Closed | Closed | Closed |
|------+--------+--------+--------+--------+--------+--------|
| P39 | N/A | N/A | N/A | N/A | N/A | N/A |
|------+--------+--------+--------+--------+--------+--------|
| P97 | Open | Open | Open | Open | Closed | Open |
|------+--------+--------+--------+--------+--------+--------|
| P100 |pins 2 &|pins 2 &|pins 2 &|pina 2 &|pins 2 &|pins 2 &|
| | 3 | 3 | 3 | 3 | 3 | 3 |
|------------------------------------------------------------|
|Note:Pins designated should be in the closed position. |
| |
|Location of jumpers P30, P31, P32 and P97 are unknown. |
+------------------------------------------------------------+