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# ZENY COMPUTERS
ZEN 3486
Processor 80386DX/80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor 20/25/33/40/50(internal)/50/66(internal) MHz
Speed
Chip Set UMC
Max. Onboard 48MB
DRAM
SRAM Cache 64/128KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options None
NPU Options 80387/3167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Location | Function | Location |
|---------------------+----------+----------------+----------|
| Speaker | J2 | Turbo LED | J5 |
|---------------------+----------+----------------+----------|
| External Battery | J3 | Reset switch | J6 |
|---------------------+----------+----------------+----------|
| Power LED & keylock | J4 | Turbo Switch | W22 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|------------------------------------+----------+------------|
| » | Battery select internal | J1 | Closed |
|---+--------------------------------+----------+------------|
| | Battery select external | J1 | Open |
|---+--------------------------------+----------+------------|
| » | Factory configured - do not | W3 | Open |
| | alter | | |
|---+--------------------------------+----------+------------|
| » | Factory configured - do not | W4 | Open |
| | alter | | |
|---+--------------------------------+----------+------------|
| » | NPU Select 3187 or none | W15 & | Open |
| | | W20 | |
|---+--------------------------------+----------+------------|
| | NPU Select 80387 | W15 & | Closed |
| | | W20 | |
|---+--------------------------------+----------+------------|
| » | Factory configured do not | W16 | Open |
| | alter | | |
|---+--------------------------------+----------+------------|
| » | NPU synchronous with CPU | W19 | Open |
| | | | |
| | | W21 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+----------+------------|
| | NPU sysnchronous with | W19 | Closed |
| | oscillator installed at Y1 | | |
| | | W21 | pins 2 & 3 |
| | | | closed |
|---+--------------------------------+----------+------------|
| » | Factory configured - do not | W23 | Open |
| | alter | | |
|---+--------------------------------+----------+------------|
| » | Factory configured - do not | W27 | Open |
| | alter | | |
|---+--------------------------------+----------+------------|
| » | Factory configured - do not | W28 | Open |
| | alter | | |
|---+--------------------------------+----------+------------|
| » | CMOS memory normal operation | W29 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+----------+------------|
| | CMOS memory clear | W29 | pins 2 & 3 |
| | | | closed |
|------------------------------------------------------------|
| Note: W27 & W28 may not be present on later revisions |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU CONFIGURATION |
|------------------------------------------------------------|
| Type | CPU | OSC | W14 | W24 | W25 | W26 |
| | Speed | | | | | |
|----------+---------+-------+--------+--------+------+------|
| 80386DX | 33MHz | 66MHz | Open | Open | N/A | N/A |
|----------+---------+-------+--------+--------+------+------|
| 80386DX | 40MHz | 80MHz | Open | Open | N/A | N/A |
|----------+---------+-------+--------+--------+------+------|
| 80486SX | 20MHz | 20MHz | Closed | Open | pins | Open |
| | | | | | 2 & | |
| | | | | | 3 | |
|----------+---------+-------+--------+--------+------+------|
| 80486SX | 20MHz | 40MHz | Closed | Open | pins | Open |
| | | | | | 2 & | |
| | | | | | 3 | |
|----------+---------+-------+--------+--------+------+------|
| 80486SX | 25MHz | 25MHz | Closed | Open | pins | Open |
| | | | | | 2 & | |
| | | | | | 3 | |
|----------+---------+-------+--------+--------+------+------|
| 80486SX | 25MHz | 50MHz | Closed | Closed | pins | Open |
| | | | | | 2 & | |
| | | | | | 3 | |
|----------+---------+-------+--------+--------+------+------|
| 80487SX | 25MHz | 25MHz | Closed | Open | pins | pins |
| | | | | | 1 & | 2 & |
| | | | | | 2 | 3 |
| | | | | | and | |
| | | | | | 3 & | |
| | | | | | 4 | |
|----------+---------+-------+--------+--------+------+------|
| 80486DX | 33MHz | 33MHz | Closed | Open | pins | pins |
| | | | | | 1 & | 1 & |
| | | | | | 2 | 2 |
| | | | | | and | |
| | | | | | 3 & | |
| | | | | | 4 | |
|----------+---------+-------+--------+--------+------+------|
| 80486DX | 33MHz | 66MHz | Closed | Closed | pins | pins |
| | | | | | 1 & | 1 & |
| | | | | | 2 | 2 |
| | | | | | and | |
| | | | | | 3 & | |
| | | | | | 4 | |
|----------+---------+-------+--------+--------+------+------|
| 80486DX | 50MHz | 50MHz | Closed | Open | pins | pins |
| | | | | | 1 & | 1 & |
| | | | | | 2 | 2 |
| | | | | | and | |
| | | | | | 3 & | |
| | | | | | 4 | |
|----------+---------+-------+--------+--------+------+------|
| ODP486SX | 50iMHz | 25MHz | Closed | Open | pins | pins |
| | | | | | 1 & | 2 & |
| | | | | | 2 | 3 |
| | | | | | and | |
| | | | | | 3 & | |
| | | | | | 4 | |
|----------+---------+-------+--------+--------+------+------|
| 80486DX2 | 50iMHz | 25MHz | Closed | Open | pins | pins |
| | | | | | 1 & | 1 & |
| | | | | | 2 | 2 |
| | | | | | and | |
| | | | | | 3 & | |
| | | | | | 4 | |
|----------+---------+-------+--------+--------+------+------|
| 80486DX2 | 50iMHz | 50MHz | Closed | Closed | pins | pins |
| | | | | | 1 & | 1 & |
| | | | | | 2 | 2 |
| | | | | | and | |
| | | | | | 3 & | |
| | | | | | 4 | |
|------------------------------------------------------------|
| Note:pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | W5 | W6 |
|------+----------+----------+-----------+----------+--------|
| 1MB | (4) 256K | None | None | pins 1 & | pins 1 |
| | x 9 | | | 2 | & 2 |
|------+----------+----------+-----------+----------+--------|
| 2MB | (4) 256K | (4) 256K | None | pins 1 & | pins 1 |
| | x 9 | x 9 | | 2 | & 2 |
|------+----------+----------+-----------+----------+--------|
| 3MB | (4) 256K | (4) 256K | (1) 256K | pins 2 & | pins 2 |
| | x 9 | x 9 | x 36 | 3 | & 3 |
|------+----------+----------+-----------+----------+--------|
| 4MB | (4) 1M x | None | None | pins 1 & | pins 1 |
| | 9 | | | 2 | & 2 |
|------+----------+----------+-----------+----------+--------|
| 5MB | (4) 256K | (4) 1M x | None | pins 1 & | pins 1 |
| | x 9 | 9 | | 2 | & 2 |
|------+----------+----------+-----------+----------+--------|
| 6MB | (4) 256K | (4) 256K | (1) 1M x | pins 2 & | pins 2 |
| | x 9 | x 9 | 36 | 3 | & 3 |
|------+----------+----------+-----------+----------+--------|
| 8MB | (4) 1M x | (4) 1M x | None | pins 1 & | pins 1 |
| | 9 | 9 | | 2 | & 2 |
|------+----------+----------+-----------+----------+--------|
| 9MB | (4) 1M x | (4) 1M x | (1) 256K | pins 2 & | pins 2 |
| | 9 | 9 | x 36 | 3 | & 3 |
|------+----------+----------+-----------+----------+--------|
| 10MB | (4) 256K | (4) 256K | (1) 2M x | pins 2 & | pins 2 |
| | x 9 | x 9 | 36 | 3 | & 3 |
|------+----------+----------+-----------+----------+--------|
| 12MB | (4) 1M x | (4) 1M x | (1) 1M x | pins 2 & | pins 2 |
| | 9 | 9 | 36 | 3 | & 3 |
|------+----------+----------+-----------+----------+--------|
| 16MB | (4) 1M x | (4) 1M x | (1) 2M x | pins 2 & | pins 2 |
| | 9 | 9 | 36 | 3 | & 3 |
|------+----------+----------+-----------+----------+--------|
| 16MB | (4) 4M x | None | None | pins 1 & | pins 1 |
| | 9 | | | 2 | & 2 |
|------+----------+----------+-----------+----------+--------|
| 17MB | (4) 256K | (4) 4M x | None | pins 1 & | pins 1 |
| | x 9 | 9 | | 2 | & 2 |
|------+----------+----------+-----------+----------+--------|
| 18MB | (4) 256K | (4) 256K | (1) 4M x | pins 2 & | pins 2 |
| | x 9 | x 9 | 36 | 3 | & 3 |
|------+----------+----------+-----------+----------+--------|
| 20MB | 4) 1M x | (4) 4M x | None | pins 1 & | pins 1 |
| | 9 | 9 | | 2 | & 2 |
|------+----------+----------+-----------+----------+--------|
| 24MB | (4) 1M x | (4) 1M x | (1) 4M x | pins 2 & | pins 2 |
| | 9 | 9 | 36 | 3 | & 3 |
|------+----------+----------+-----------+----------+--------|
| 32MB | (4) 4M x | (4) 4M x | None | pins 1 & | pins 1 |
| | 9 | 9 | | 2 | & 2 |
|------+----------+----------+-----------+----------+--------|
| 33MB | (4) 4M x | (4) 4M x | (1) 256K | pins 2 & | pins 2 |
| | 9 | 9 | x 36 | 3 | & 3 |
|------+----------+----------+-----------+----------+--------|
| 36MB | (4) 4M x | (4) 4M x | (1) 1M x | pins 2 & | pins 2 |
| | 9 | 9 | 36 | 3 | & 3 |
|------+----------+----------+-----------+----------+--------|
| 40MB | (4) 4M x | (4) 4M x | (1) 2M x | pins 2 & | pins 2 |
| | 9 | 9 | 36 | 3 | & 3 |
|------+----------+----------+-----------+----------+--------|
| 48MB | (4) 4M x | (4) 4M x | (1) 4M x | pins 2 & | pins 2 |
| | 9 | 9 | 36 | 3 | & 3 |
|------------------------------------------------------------|
| Note: pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Jumper | 32KB | 64KB | 128KB | 256KB |
|-----------+------------+-----------+-----------+-----------|
| W1 | pins 2 & 3 | pins 1 & | pins 2 & | pins 1 & |
| | closed | 2 closed | 3 closed | 2 closed |
|-----------+------------+-----------+-----------+-----------|
| W2 | Open | Open | pins 1 & | pins 2 & |
| | | | 2 closed | 3 closed |
|-----------+------------+-----------+-----------+-----------|
| W7 | pins 1 & 2 | pins 2 & | pins 2 & | pins 2 & |
| | closed | 3 closed | 3 closed | 3 closed |
|-----------+------------+-----------+-----------+-----------|
| W8 | pins 1 & 2 | pins 1 & | pins 2 & | pins 2 & |
| | closed | 2 closed | 3 closed | 3 closed |
|-----------+------------+-----------+-----------+-----------|
| W9 | pins 1 & 2 | pins 1 & | pins 1 & | pins 2 & |
| | closed | 2 closed | 2 closed | 3 closed |
|-----------+------------+-----------+-----------+-----------|
| W10 | Open | Closed | Closed | Closed |
|-----------+------------+-----------+-----------+-----------|
| W11 | Open | Closed | Closed | Closed |
|-----------+------------+-----------+-----------+-----------|
| W12 | Open | Open | Open | Closed |
|-----------+------------+-----------+-----------+-----------|
| W13 | Open | Open | Closed | Closed |
|-----------+------------+-----------+-----------+-----------|
| W17 | Open | Open | Open | Closed |
|-----------+------------+-----------+-----------+-----------|
| W18 | Open | Open | Closed | Closed |
|-----------+------------+-----------+-----------+-----------|
| Cacheable | 8MB | 16MB | 32MB | 64MB |
| Region | | | | |
|------------------------------------------------------------|
| Note: W10 may not be present on later revisions |
+------------------------------------------------------------+