ATC/UNITRON COMPUTER & COMPUTER PARTS
U6978
|
Processor |
AMD K5/Pentium |
|
Processor Speed |
75/90/100MHz |
|
Chip Set |
Unidentified |
|
Max. Onboard DRAM |
128MB |
|
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 |

|
CONNECTIONS |
|||
|
Purpose |
Location |
Purpose |
Location |
|
Serial port 1 |
J1 |
Reset switch |
J9 |
|
Serial port 2 |
J2 |
IDE interface LED |
JP26 |
|
Floppy drive interface |
J3 |
Green PC connector |
JP28 |
|
Parallel port |
J4 |
Turbo LED |
JP29 |
|
IDE interface 1 |
J5 |
Turbo switch |
JP30 |
|
IDE interface 2 |
J6 |
Green PC connector |
JP31 |
|
Speaker |
J7 |
32-bit PCI slots |
PC1 - PC4 |
|
Power LED & keylock |
J8 |
|
|
|
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 write cycles force invalidation |
JP16 |
pins 2 & 3 closed |
|
|
L1 invalidate cycle select every cycle with W/R# force invalidation |
JP16 |
pins 1 & 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 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
3.3v |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 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 |