AMERICAN MEGATRENDS, INC.
MEGARUM 758
|
Processor |
Pentium II |
|
Processor Speed |
120/133/150/166/180/200/210/233/240/266MHz |
|
Chip Set |
Unidentified |
|
Video Chip Set |
ATI |
|
Maximum Onboard Memory |
1GB (EDO supported) |
|
Maximum Video Memory |
2MB |
|
Cache |
256/512KB (located on Pentium II CPU) |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit PCI slots (6), floppy drive interface, green PC connector, IDE interfaces (2), SCSI interfaces (2), Wide SCSI interfaces (2), parallel port, PS/2 mouse interface, serial ports (2), VGA interface, VRM connectors (2), USB connectors (2), CPU Slot 1s (2) |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
PS/2 mouse interface |
J1 |
Turbo LED |
J33 |
|
CPU fan power 1 |
J2 |
SCSI interface 1 |
J36 |
|
Parallel port |
J3 |
SCSI interface 2 |
J37 |
|
Floppy drive interface |
J4 |
IDE interface LED |
J38 |
|
CPU fan power 2 |
J7 |
SCSI interface LED |
J40 |
|
Serial port 2 |
J8 |
Power LED & keylock |
J41 |
|
Serial port 1 |
J9 |
Wide SCSI interface 1 |
J44 |
|
IDE interface |
J10 |
Wide SCSI interface 2 |
J45 |
|
IDE interface |
J11 |
Speaker |
J46 |
|
VGA interface |
J16 |
System override connector |
J47 |
|
Green PC connector |
J18 |
32-bit PCI slots |
PC1 - PC6 |
|
USB connector 1 |
J19 |
CPU Slot 1 |
SL1 |
|
USB connector 2 |
J20 |
CPU Slot 2 |
SL2 |
|
Chassis fan power |
J23 |
VRM connector 1 |
VRM1 |
|
Reset switch |
J28 |
VRM connector 2 |
VRM2 |
|
Chassis intrusion connector |
J29 | ||
|
Note: The location of J18 is unidentified. | |||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Label |
Position | |
|
|
Factory configured - do not alter |
C1 |
Unidentified |
|
|
Factory configured - do not alter |
C2 |
Unidentified |
|
|
Factory configured - do not alter |
C3 |
Unidentified |
|
|
PCI IRQ disabled for onboard PCI VGA |
J13 |
Closed |
|
PCI IRQ enabled for onboard PCI VGA |
J13 |
Open | |
|
|
On board video enabled |
J14 |
Open |
|
On board video disabled |
J14 |
Closed | |
|
|
CMOS memory normal operation |
J35 |
Open |
|
CMOS memory clear |
J35 |
Closed | |
|
DRAM CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
8MB |
(2) 1M x 36 |
None |
None |
None |
|
16MB |
(2) 1M x 36 |
(2) 1M x 36 |
None |
None |
|
16MB |
(2) 2M x 36 |
None |
None |
None |
|
24MB |
(2) 1M x 36 |
(2) 1M x 36 |
(2) 1M x 36 |
None |
|
32MB |
(2) 1M x 36 |
(2) 1M x 36 |
(2) 1M x 36 |
(2) 1M x 36 |
|
32MB |
(2) 2M x 36 |
(2) 2M x 36 |
None |
None |
|
32MB |
(2) 4M x 36 |
None |
None |
None |
|
48MB |
(2) 2M x 36 |
(2) 2M x 36 |
(2) 2M x 36 |
None |
|
64MB |
(2) 2M x 36 |
(2) 2M x 36 |
(2) 2M x 36 |
(2) 2M x 36 |
|
64MB |
(2) 4M x 36 |
(2) 4M x 36 |
None |
None |
|
DRAM CONFIGURATION (CON'T) | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
64MB |
(2) 8M x 36 |
None |
None |
None |
|
96MB |
(2) 4M x 36 |
(2) 4M x 36 |
(2) 4M x 36 |
None |
|
128MB |
(2) 4M x 36 |
(2) 4M x 36 |
(2) 4M x 36 |
(2) 4M x 36 |
|
128MB |
(2) 8M x 36 |
(2) 8M x 36 |
None |
None |
|
128MB |
(2) 16M x 36 |
None |
None |
None |
|
192MB |
(2) 8M x 36 |
(2) 8M x 36 |
(2) 8M x 36 |
None |
|
256MB |
(2) 8M x 36 |
(2) 8M x 36 |
(2) 8M x 36 |
(2) 8M x 36 |
|
256MB |
(2) 16M x 36 |
(2) 16M x 36 |
None |
None |
|
256MB |
(2) 32M x 36 |
None |
None |
None |
|
384MB |
(2) 16M x 36 |
(2) 16M x 36 |
(2) 16M x 36 |
None |
|
512MB |
(2) 16M x 36 |
(2) 16M x 36 |
(2) 16M x 36 |
(2) 16M x 36 |
|
512MB |
(2) 32M x 36 |
(2) 32M x 36 |
None |
None |
|
768MB |
(2) 32M x 36 |
(2) 32M x 36 |
(2) 32M x 36 |
None |
|
1GB |
(2) 32M x 36 |
(2) 32M x 36 |
(2) 32M x 36 |
(2) 32M x 36 |
|
Note: Board accepts EDO memory. Do not use 16M x 36 SIMMs that have more than 36 chips per SIMM. | ||||
|
CACHE CONFIGURATION |
|
Note: 256KB/512KB cache is located on the Pentium II CPU. |
|
CPU SPEED SELECTION | ||
|
Speed |
J21 |
J24 |
|
120MHz |
Open |
Pins 1 & 2, 3 & 4, 5 & 6, 7 & 8 closed |
|
133MHz |
Closed |
Pins 1 & 2, 3 & 4, 5 & 6, 7 & 8 closed |
|
150MHz |
Open |
Pins 3 & 4, 5 & 6, 7 & 8 closed |
|
166MHz |
Closed |
Pins 3 & 4, 5 & 6, 7 & 8 closed |
|
180MHz |
Open |
Pins 1 & 2, 5 & 6, 7 & 8 closed |
|
200MHz |
Closed |
Pins 1 & 2, 5 & 6, 7 & 8 closed |
|
210MHz |
Open |
Pins 5 & 6, 7 & 8 closed |
|
233MHz |
Closed |
Pins 5 & 6, 7 & 8 closed |
|
240MHz |
Open |
Pins 1 & 2, 3 & 4, 7 & 8 closed |
|
266MHz |
Closed |
Pins 1 & 2, 3 & 4, 7 & 8 closed |
|
CPU VOLTAGE SELECTION | |||
|
Voltage |
J5 |
J15 | |
|
1.8v |
1 & 2, 3 & 4, 7 & 8 |
1 & 2, 3 & 4, 7 & 8 | |
|
1.85v |
1 & 2, 3 & 4, 7 & 8, 9 & 10 |
1 & 2, 3 & 4, 7 & 8, 9 & 10 | |
|
1.9v |
1 & 2, 3 & 4, 5 & 6 |
1 & 2, 3 & 4, 5 & 6 | |
|
1.95v |
1 & 2, 3 & 4, 5 & 6, 9 & 10 |
1 & 2, 3 & 4, 5 & 6, 9 & 10 | |
|
2.0v |
1 & 2, 3 & 4, 5 & 6, 7 & 8 |
1 & 2, 3 & 4, 5 & 6, 7 & 8 | |
|
2.05v |
1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10 |
1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10 | |
|
2.1v |
9 & 10 |
9 & 10 | |
|
2.2v |
7 & 8 |
7 & 8 | |
|
2.3v |
7 & 8, 9 & 10 |
7 & 8, 9 & 10 | |
|
2.4v |
5 & 6 |
5 & 6 | |
|
2.5v |
5 & 6, 9 & 10 |
5 & 6, 9 & 10 | |
|
2.6v |
5 & 6, 7 & 8 |
5 & 6, 7 & 8 | |
|
2.7v |
5 & 6, 7 & 8, 9 & 10 |
5 & 6, 7 & 8, 9 & 10 | |
|
2.8v |
3 & 4 |
3 & 4 | |
|
2.9v |
3 & 4, 9 & 10 |
3 & 4, 9 & 10 | |
|
3.0v |
3 & 4, 7 & 8 |
3 & 4, 7 & 8 | |
|
3.1v |
3 & 4, 7 & 8, 9 & 10 |
3 & 4, 7 & 8, 9 & 10 | |
|
3.2v |
3 & 4, 5 & 6 |
3 & 4, 5 & 6 | |
|
3.3v |
3 & 4, 5 & 6, 9 & 10 |
3 & 4, 5 & 6, 9 & 10 | |
|
3.4v |
3 & 4, 5 & 6, 7 & 8 |
3 & 4, 5 & 6, 7 & 8 | |
|
3.5v |
3 & 4, 5 & 6, 7 & 8, 9 & 10 |
3 & 4, 5 & 6, 7 & 8, 9 & 10 | |
|
Note: Pins designated should be in the closed position. J5 controls Slot 1 & J15 controls Slot 2. | |||