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# DATAEXPERT CORPORATION
EXP8C49
Device Mainboard
Type
Processor CX486DX2/CX486DX4/CX 5X86
Processor 40/50(internal)/66(internal)/75(internal)100(internal)MHz
Speed
Chip Set ALI
Video Chip None
Set
Maximum 64MB
Onboard
Memory
Maximum None
Video
Memory
Cache 128/256/512KB
BIOS AMI
Dimensions 220mm x 220mm
I/O 32-bit PCI slots (3), floppy drive interface, green PC
Options connector, IDE interfaces (2), parallel port, PS/2 mouse
port, serial ports (2)
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Serial port 2 | CN1 | IDE interface | J2 |
| | | LED | |
|-------------------+----------+------------------+----------|
| Serial port 1 | CN2 | Reset switch | J3 |
|-------------------+----------+------------------+----------|
| Floppy drive | CN3 | Turbo switch | J4 |
| interface | | | |
|-------------------+----------+------------------+----------|
| Parallel port | CN4 | Turbo LED | J5 |
|-------------------+----------+------------------+----------|
| IDE interface 1 | CN5 | Power LED & | J6 |
| | | keylock | |
|-------------------+----------+------------------+----------|
| IDE interface 2 | CN6 | Speaker | J7 |
|-------------------+----------+------------------+----------|
| PS/2 mouse port | CN7 | Green PC | JP15 |
| | | connector | |
|-------------------+----------+------------------+----------|
| External battery | J1 | 32-bit PCI slots | PC1 – |
| | | | PC3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| | Battery type select external | J1 | Closed |
|---+---------------------------------+-------+--------------|
| | CMOS memory clear | J1 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP4 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| | Parallel port IRQ select IRQ7 | JP9 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Parallel port IRQ select IRQ5 | JP9 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP14 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP18 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| | Flash BIOS voltage select 12v | JP21 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Flash BIOS voltage select 5v | JP21 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP24 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP41 | Unidentified |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|--------+-------------+-------------+-------------+---------|
| 4MB | (1) 1M x 36 | None | None | None |
|--------+-------------+-------------+-------------+---------|
| 8MB | (1) 2M x 36 | None | None | None |
|--------+-------------+-------------+-------------+---------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | None | None |
|--------+-------------+-------------+-------------+---------|
| 12MB | (1) 2M x 36 | (1) 1M x 36 | None | None |
|--------+-------------+-------------+-------------+---------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x 36 | None |
|--------+-------------+-------------+-------------+---------|
| 12MB | (1) 1M x 36 | (1) 2M x 36 | None | None |
|--------+-------------+-------------+-------------+---------|
| 16MB | (1) 4M x 36 | None | None | None |
|--------+-------------+-------------+-------------+---------|
| 16MB | (1) 2M x 36 | (1) 1M x 36 | (1) 1M x 36 | None |
|--------+-------------+-------------+-------------+---------|
| 16MB | (1) 2M x 36 | (1) 2M x 36 | None | None |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 4M x 36 | (1) 1M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 2M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 1M x 36 | (1) 2M x 36 | (1) 2M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 4M x 36 | (1) 2M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 28MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 8M x 36 | None | None | None |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 2M x 36 | (1) 2M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 8M x 36 | (1) 1M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 8M x 36 | (1) 1M x 36 | (1) 1M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 8M x 36 | (1) 2M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 4M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 8M x 36 | (1) 2M x 36 | (1) 2M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 8M x 36 | (1) 4M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 56MB | (1) 8M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 56MB | (1) 2M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 8M x 36 | (1) 4M x 36 | (1) 4M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 8M x 36 | (1) 8M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | TAG |
|-----------+-----------+-----------+-----------+------------|
| 128KB (A) | None | None | (4) 32K x | (1) 8K x 8 |
| | | | 8 | |
|-----------+-----------+-----------+-----------+------------|
| 128KB (B) | (1) 32K x | None | None | (1) 8K x 8 |
| | 32 | | | |
|-----------+-----------+-----------+-----------+------------|
| 256KB (A) | None | None | (4) 64K x | (1) |
| | | | 8 | 16K/32K x |
| | | | | 8 |
|-----------+-----------+-----------+-----------+------------|
| 256KB (B) | (1) 32K x | None | (4) 32K x | (1) |
| | 32 | | 8 | 16K/32K x |
| | | | | 8 |
|-----------+-----------+-----------+-----------+------------|
| 256KB (C) | (1) 32K x | (1) 32K x | None | (1) |
| | 32 | 32 | | 16K/32K x |
| | | | | 8 |
|-----------+-----------+-----------+-----------+------------|
| 512KB | None | None | (4) 128K | (1) 32K x |
| | | | x 8 | 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP17 | JP20 | JP37 | JP42 |
|-----------+--------+--------+-----------------+------------|
| 128KB (A) | Open | Open | Pins 1 & 2 | Pins 1 & 2 |
| | | | closed | closed |
|-----------+--------+--------+-----------------+------------|
| 128KB (B) | Open | Open | Pins 1 & 2 | Pins 1 & 2 |
| | | | closed | closed |
|-----------+--------+--------+-----------------+------------|
| 256KB (A) | Open | Closed | Pins 1 & 2 | Pins 2 & 3 |
| | | | closed | closed |
|-----------+--------+--------+-----------------+------------|
| 256KB (B) | Open | Closed | Pins 2 & 3 | Pins 2 & 3 |
| | | | closed | closed |
|-----------+--------+--------+-----------------+------------|
| 256KB (C) | Open | Closed | Pins 2 & 3 | Pins 2 & 3 |
| | | | closed | closed |
|-----------+--------+--------+-----------------+------------|
| 512KB | Closed | Closed | Pins 1 & 2 | Pins 2 & 3 |
| | | | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JP11 | JP12 | JP13 | JP16 |
|----------+---------+---------+-------------------+---------|
| 40MHz | Open | Closed | Pins 2 & 3 closed | Open |
|----------+---------+---------+-------------------+---------|
| 40MHz | Open | Closed | Pins 1 & 2 closed | Closed |
|----------+---------+---------+-------------------+---------|
| 50iMHz | Open | Open | Pins 2 & 3 closed | Open |
|----------+---------+---------+-------------------+---------|
| 66iMHz | Closed | Closed | Pins 2 & 3 closed | Open |
|----------+---------+---------+-------------------+---------|
| 75iMHz | Open | Open | Pins 2 & 3 closed | Open |
|----------+---------+---------+-------------------+---------|
| 100iMHz | Closed | Closed | Pins 2 & 3 closed | Open |
|------------------------------------------------------------|
| Note: Either setting may be used for 40MHz. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP23 | JP32 | JP35 |
|----------+----------------+----------------+---------------|
| CX486DX2 | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & 2 |
| | closed | closed | closed |
|----------+----------------+----------------+---------------|
| CX486DX4 | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & 2 |
| | closed | closed | closed |
|----------+----------------+----------------+---------------|
| CX 5X86 | Pins 1 & 2 | Pins 1 & 2 | Pins 2 & 4 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JP29 |
|----------------------------+-------------------------------|
| | 3.3v | Pins 1 & 2 closed |
|---+------------------------+-------------------------------|
| » | 3.45v | Pins 3 & 4 closed |
|---+------------------------+-------------------------------|
| | 3.6v | Pins 5 & 6 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA CHANNEL SELECTION |
|------------------------------------------------------------|
| Channel | JP5 | JP6 |
|------------------+--------------------+--------------------|
| 1 | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 3 | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTERNAL KEYBOARD SELECTION |
|------------------------------------------------------------|
| Setting | JP19 | JP39 | JP40 |
|-------------------+-------------+-------------+------------|
| » | Enabled | Open | Closed | Closed |
|---+---------------+-------------+-------------+------------|
| | Disabled | Closed | Open | Open |
+------------------------------------------------------------+