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# UNIDENTIFIED
3486HN CACHE MAINBOARD
Processor AM386DX/80386DX/CX486DLC/80486SX/80487SX/80486DX/80486DX2
Processor 20/25/33/40/50(internal)/50/66(internal)MHz
Speed
Chip Set OPTI
Max. 32MB
Onboard
DRAM
Cache 64/128/256KB
BIOS AMI
Dimensions 254mm x 220mm
I/O None
Options
NPU 80387DX
Options
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| External battery | J2 | Turbo LED | J44 |
|---------------------+----------+----------------+----------|
| Power LED & keylock | J42 | Reset switch | J45 |
|---------------------+----------+----------------+----------|
| Turbo switch | J43 | Speaker | J46 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | CMOS memory normal operation | J3 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | J3 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | 80386 speed select 33MHz | J4 | Closed |
|---+----------------------------------+--------+------------|
| | 80386 speed select 40MHz | J4 | Open |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J5 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | J6 | Closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | J6 | Open |
|---+----------------------------------+--------+------------|
| » | 80386 PQFP CPU disabled | J24 | Closed |
|---+----------------------------------+--------+------------|
| | 80386 PQFP CPU enabled | J24 | Open |
|---+----------------------------------+--------+------------|
| » | 80486 PQFP CPU disabled | J27 | Closed |
|---+----------------------------------+--------+------------|
| | 80486 PQFP CPU enabled | J27 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
|------------------+--------------------+--------------------|
| 5MB | (4) 256K x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 20MB | (4) 1M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 20MB | (4) 4M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG (U29) | TAG (U30) |
|-------+-------------+------------+------------+------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 | NONE |
|-------+-------------+------------+------------+------------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 | NONE |
|-------+-------------+------------+------------+------------|
| 256KB | (4) 32K x 8 | (4) 32K x | (1) 8K x 8 | (1) 8K x 8 |
| | | 8 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | J34 | J36 | J37 | J38 |
|---------+----------+-------------------+---------+---------|
| 64KB | Open | pins 2 & 3 closed | Open | Open |
|---------+----------+-------------------+---------+---------|
| 128KB | Closed | pins 1 & 2 closed | Closed | Open |
|---------+----------+-------------------+---------+---------|
| 256KB | Closed | pins 2 & 3 closed | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | J23 | J31 |
|--------------------+--------------------+------------------|
| 80386DX | pins 1 & 2 closed | Open |
|--------------------+--------------------+------------------|
| CX486DLC | pins 1 & 2 closed | Open |
|--------------------+--------------------+------------------|
| 80486SX/DX/DX2 | pins 2 & 3 closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | J25 | J26 |
|--------------------+-------------------+-------------------|
| Cyrix | Closed | Closed |
|--------------------+-------------------+-------------------|
| AMD/Intel | Open | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | J28 | J29 | J41 |
|----------------+--------+-----------------+----------------|
| 80486SX (PQFP) | Closed | pins 2 & 3 | Open |
| | | closed | |
|----------------+--------+-----------------+----------------|
| 80486 (PGA) | Open | pins 2 & 3 | Open |
| | | closed | |
|----------------+--------+-----------------+----------------|
| 80487SX | Open | pins 2 & 3 | pins 2 & 3 |
| | | closed | closed |
|----------------+--------+-----------------+----------------|
| 80486DX/DX2 | Closed | pins 1 & 2 | pins 1 & 2 |
| | | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | J39 | J40 |
|------------------+--------------------+--------------------|
| 80386DX | pins 1 & 2 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| CX486DLC | pins 1 & 2 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 80486DX | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 80486DX2 | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU CLOCK SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | J30 | J32 |
|-------------------+--------------------+-------------------|
| 40MHz | Closed | Closed |
|-------------------+--------------------+-------------------|
| 50MHz | Closed | Open |
|-------------------+--------------------+-------------------|
| 66MHz | Open | Closed |
|-------------------+--------------------+-------------------|
| 80MHz | Open | Open |
+------------------------------------------------------------+