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# ATC/UNITRON COMPUTER & COMPUTER PARTS
U6978
Processor AMD K5/Pentium
Processor 75/90/100MHz
Speed
Chip Set Unidentified
Max. Onboard 128MB
DRAM
Cache 64/256/512/1024KB
BIOS Award
Dimensions 330mm x 218mm
I/O Options 32-bit PCI slots (4), green PC connector, floppy
drive interface, IDE interfaces (2), parallel
port, serial ports (2)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Serial port 1 | J1 | Reset switch | J9 |
|-------------------+----------+------------------+----------|
| Serial port 2 | J2 | IDE interface | JP26 |
| | | LED | |
|-------------------+----------+------------------+----------|
| Floppy drive | J3 | Green PC | JP28 |
| interface | | connector | |
|-------------------+----------+------------------+----------|
| Parallel port | J4 | Turbo LED | JP29 |
|-------------------+----------+------------------+----------|
| IDE interface 1 | J5 | Turbo switch | JP30 |
|-------------------+----------+------------------+----------|
| IDE interface 2 | J6 | Green PC | JP31 |
| | | connector | |
|-------------------+----------+------------------+----------|
| Speaker | J7 | 32-bit PCI slots | PC1 - |
| | | | PC4 |
|-------------------+----------+------------------+----------|
| Power LED & | J8 | | |
| keylock | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|----------------------------------------+--------+----------|
| » | ECP/EPP signal select DREQ1 | JP1 | pins 1 & |
| | | | 3 closed |
|---+------------------------------------+--------+----------|
| | ECP/EPP signal select DREQ3 | JP1 | pins 2 & |
| | | | 4 closed |
|---+------------------------------------+--------+----------|
| » | ECP/EPP signal select DACK1 | JP2 | pins 1 & |
| | | | 4 closed |
|---+------------------------------------+--------+----------|
| | ECP/EPP signal select DACK3 | JP2 | pins 2 & |
| | | | 5 closed |
|---+------------------------------------+--------+----------|
| » | Monitor type select color | JP3 | Closed |
|---+------------------------------------+--------+----------|
| | Monitor type select monochrome | JP3 | Open |
|---+------------------------------------+--------+----------|
| » | Factory configured - do not alter | JP4 | N/A |
|---+------------------------------------+--------+----------|
| » | BIOS type select EPROM | JP6 | Open |
|---+------------------------------------+--------+----------|
| | BIOS type select 5v flash | JP6 | pins 2 & |
| | | | 3 closed |
|---+------------------------------------+--------+----------|
| | BIOS type select 12v flash | JP6 | pins 1 & |
| | | | 2 closed |
|---+------------------------------------+--------+----------|
| » | Factory configured - do not alter | JP7 | N/A |
|---+------------------------------------+--------+----------|
| » | CMOS memory normal operation | JP8 | Open |
|---+------------------------------------+--------+----------|
| | CMOS memory clear | JP8 | Closed |
|---+------------------------------------+--------+----------|
| » | Factory configured - do not alter | JP11 | N/A |
|---+------------------------------------+--------+----------|
| » | L1 invalidate cycle select master | JP16 | pins 2 & |
| | write cycles force invalidation | | 3 closed |
|---+------------------------------------+--------+----------|
| | L1 invalidate cycle select every | JP16 | pins 1 & |
| | cycle with W/R# force invalidation | | 2 closed |
|---+------------------------------------+--------+----------|
| » | Pipeline disabled | JP17 | pins 2 & |
| | | | 3 closed |
|---+------------------------------------+--------+----------|
| | Pipeline enabled | JP17 | pins 1 & |
| | | | 2 closed |
|---+------------------------------------+--------+----------|
| » | Cache type select write back | JP21 | pins 1 & |
| | | | 2 closed |
|---+------------------------------------+--------+----------|
| | Cache type select write through | JP21 | pins 2 & |
| | | | 3 closed |
|---+------------------------------------+--------+----------|
| » | Turbo enabled | JP30 | pins 1 & |
| | | | 2 closed |
|---+------------------------------------+--------+----------|
| | Turbo disabled | JP30 | pins 2 & |
| | | | 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION 1 |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|-------------------+--------------------+-------------------|
| 2MB | (2) 256K x 36 | NONE |
|-------------------+--------------------+-------------------|
| 4MB | (2) 512K x 36 | NONE |
|-------------------+--------------------+-------------------|
| 8MB | (2) 1M x 36 | NONE |
|-------------------+--------------------+-------------------|
| 16MB | (2) 2M x 36 | NONE |
|-------------------+--------------------+-------------------|
| 32MB | (2) 4M x 36 | NONE |
|-------------------+--------------------+-------------------|
| 64MB | (2) 8M x 36 | NONE |
|-------------------+--------------------+-------------------|
| 128MB | (2) 16M x 36 | NONE |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION 2 |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 4MB | (2) 256K x 36 | (2) 256K x 36 |
|------------------+--------------------+--------------------|
| 16MB | (2) 1M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 64MB | (2) 4M x 36 | (2) 4M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION 3 |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 12MB | (2) 512K x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 36MB | (2) 512K x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 8MB | (2) 512K x 36 | (2) 512K x 36 |
|------------------+--------------------+--------------------|
| 20MB | (2) 512K x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 48MB | (2) 2M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 32MB | (2) 2M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 80MB | (2) 2M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 128MB | (2) 8M x 36 | (2) 8M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Configuration | JP9 |
|----------------------------+-------------------------------|
| 1 | pins 1 & 2 OR 2 & 3 closed |
|----------------------------+-------------------------------|
| 2 | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 3 | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | TAG |
|------------------+--------------------+--------------------|
| 64KB | (8) 8K x 8 | (1) 8K x 8 |
|------------------+--------------------+--------------------|
| 256KB | (8) 32K x 8 | (1) 8K x 8 |
|------------------+--------------------+--------------------|
| 512KB | (8) 64K x 8 | (1) 16K x 8 |
|------------------+--------------------+--------------------|
| 1MB | (8) 128K x 8 | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP13 | JP14 | JP19 | JP20 |
|-----------+------------+-----------+-----------+-----------|
| 64KB | Open | Open | Open | Open |
|-----------+------------+-----------+-----------+-----------|
| 256KB | Open | Open | Closed | Closed |
|-----------+------------+-----------+-----------+-----------|
| 512KB | Open | Closed | Closed | Closed |
|-----------+------------+-----------+-----------+-----------|
| 1MB | Closed | Closed | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | JP15 | JP18 | JP25 |
|---------------+------------------+------------+------------|
| Mixed voltage | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed |
|---------------+------------------+------------+------------|
| 3.3v | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP23 | JP24 | JP27 |
|---------------+--------------+--------------+--------------|
| AMD K5 | Open | Open | Open |
|---------------+--------------+--------------+--------------|
| Pentium | Closed | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP10 | JP12 |
|--------------------+-------------------+-------------------|
| 75MHz | Open | Open |
|--------------------+-------------------+-------------------|
| 90MHz | Open | Closed |
|--------------------+-------------------+-------------------|
| 100MHz | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION (AMD K5) |
|------------------------------------------------------------|
| Speed | JP22 |
|----------------------------+-------------------------------|
| 1x | pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 1.5x/2x/3x | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION (PENTIUM) |
|------------------------------------------------------------|
| Speed | JP22 |
|----------------------------+-------------------------------|
| 1.5x | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 2x | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PCI IDE CONFIGURATION |
|------------------------------------------------------------|
| Base address | JP5 |
|----------------------------+-------------------------------|
| » | Enabled | pins 1 & 2 open |
|---+------------------------+-------------------------------|
| » | Disabled | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PCI IDE CONFIGURATION |
|------------------------------------------------------------|
| 1st IDE channel | JP5 |
|-----------------------------+------------------------------|
| » | Enabled | pins 3 & 4 open |
|-----+-----------------------+------------------------------|
| » | Disabled | pins 3 & 4 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PCI IDE CONFIGURATION |
|------------------------------------------------------------|
| 2nd IDE channel | JP5 |
|-----------------------------+------------------------------|
| » | Enabled | pins 5 & 6 closed |
|-----+-----------------------+------------------------------|
| » | Disabled | pins 5 & 6 open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PCI IDE CONFIGURATION |
|------------------------------------------------------------|
| External D/FF | JP5 |
|----------------------------+-------------------------------|
| » | Needed | pins 9 & 10 open |
|---+------------------------+-------------------------------|
| » | Not needed | pins 9 & 10 closed |
+------------------------------------------------------------+