AMERICAN MEGATRENDS, INC.
ATLAS PCI LPX
|
Processor |
Pentium |
|
Processor Speed |
75/90/100/120/133/150MHz |
|
Chip Set |
Unidentified |
|
Video Chip Set |
ATI |
|
Maximum Onboard Memory |
128MB (EDO supported) |
|
Maximum Video Memory |
2MB |
|
Cache |
256/512KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 228mm |
|
I/O Options |
Floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), VGA feature connector, VGA port, riser slot, cache slot, MIDI/joystick interface |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Floppy drive interface |
J1 |
Turbo LED |
J32 |
|
IDE interface 1 |
J2 |
Chassis fan power |
J34 |
|
MIDI/joystick interface |
J3 |
IDE interface LED |
J36 |
|
IDE interface 2 |
J4 |
Parallel port |
J37 |
|
PS/2 mouse port |
J9 |
VGA port |
J41 |
|
Serial port 1 |
J14 |
VGA feature connector |
J42 |
|
Serial port 2 |
J19 |
Green PC connector |
J44 |
|
Power LED & keylock |
J26 |
Cache slot |
SL1 |
|
Reset switch |
J28 |
Riser slot |
SL2 |
|
Speaker |
J31 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Label |
Position | |
|
Serial port 2 used as serial port |
J8 |
Pins 2 & 3 closed | |
|
Serial port 2 used as IR connector |
J8 |
Pins 1 & 2 closed | |
|
|
Serial port 2 IRQ select IRQ3 |
J11 |
Pins 1 & 2 closed |
|
Serial port 2 IRQ select IRQ4 |
J11 |
Pins 2 & 3 closed | |
|
|
Serial port 1 IRQ select IRQ4 |
J12 |
Pins 1 & 2 closed |
|
Serial port 1 IRQ select IRQ3 |
J12 |
Pins 2 & 3 closed | |
|
|
Parallel port IRQ select IRQ7 |
J13 |
Pins 1 & 2 closed |
|
Parallel port IRQ select IRQ5 |
J13 |
Pins 2 & 3 closed | |
|
|
PS/2 mouse enabled |
J20 |
Pins 1 & 2 closed |
|
PS/2 mouse disabled |
J20 |
Pins 2 & 3 closed | |
|
Jumper information unavailable |
J23 |
N/A | |
|
Jumper information unavailable |
J24 |
N/A | |
|
Jumper information unavailable |
J25 |
N/A | |
|
On board video enabled |
J27 |
Pins 1 & 2 closed | |
|
On board video disabled |
J27 |
Pins 2 & 3 closed | |
|
|
CMOS memory normal operation |
J29 |
Open |
|
CMOS memory clear |
J29 |
Closed | |
|
Jumper information unavailable |
J30 |
N/A | |
|
On board video IRQ enabled |
J33 |
Closed | |
|
On board video IRQ disabled |
J33 |
Open | |
|
Jumper information unavailable |
J34 |
N/A | |
|
Jumper information unavailable |
J35 |
N/A | |
|
Jumper information unavailable |
J45 |
N/A | |
|
DRAM CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
2MB |
(2) 256K x 36 |
None |
|
4MB |
(2) 256K x 36 |
(2) 256K x 36 |
|
8MB |
(2) 1M x 36 |
None |
|
10MB |
(2) 1M x 36 |
(2) 256K x 36 |
|
10MB |
(2) 256K x 36 |
(2) 1M x 36 |
|
16MB |
(2) 2M x 36 |
None |
|
16MB |
(2) 1M x 36 |
(2) 1M x 36 |
|
18MB |
(2) 2M x 36 |
(2) 256K x 36 |
|
18MB |
(2) 256K x 36 |
(2) 2M x 36 |
|
24MB |
(2) 2M x 36 |
(2) 1M x 36 |
|
24MB |
(2) 1M x 36 |
(2) 2M x 36 |
|
32MB |
(2) 4M x 36 |
None |
|
32MB |
(2) 2M x 36 |
(2) 2M x 36 |
|
34MB |
(2) 4M x 36 |
(2) 256K x 36 |
|
34MB |
(2) 256K x 36 |
(2) 4M x 36 |
|
40MB |
(2) 4M x 36 |
(2) 1M x 36 |
|
40MB |
(2) 1M x 36 |
(2) 4M x 36 |
|
48MB |
(2) 4M x 36 |
(2) 2M x 36 |
|
48MB |
(2) 2M x 36 |
(2) 4M x 36 |
|
64MB |
(2) 8M x 36 |
None |
|
64MB |
(2) 4M x 36 |
(2) 4M x 36 |
|
66MB |
(2) 8M x 36 |
(2) 256K x 36 |
|
66MB |
(2) 256K x 36 |
(2) 8M x 36 |
|
72MB |
(2) 8M x 36 |
(2) 1M x 36 |
|
72MB |
(2) 1M x 36 |
(2) 8M x 36 |
|
80MB |
(2) 8M x 36 |
(2) 2M x 36 |
|
80MB |
(2) 2M x 36 |
(2) 8M x 36 |
|
96MB |
(2) 8M x 36 |
(2) 4M x 36 |
|
96MB |
(2) 4M x 36 |
(2) 8M x 36 |
|
128MB |
(2) 8M x 36 |
(2) 8M x 36 |
|
128MB |
(2) 16M x 36 |
None |
|
Note: Board accepts EDO memory. Board also accepts x 32 SIMMs. | ||
|
CACHE CONFIGURATION | |
|
Size |
SL1 |
|
256KB |
Installed |
|
512KB |
Installed |
|
Note: Cache modules can be asynchronous, pipeline burst or synchronous burst. Only one module can be installed at SL1. | |
|
VIDEO MEMORY CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
1MB |
1MB |
None |
|
2MB |
1MB |
1MB |
|
Note: Bank 0 is factory installed and is not configurable. The size of the Bank 1 chips are unidentified. | ||
|
CPU SPEED SELECTION | |||
|
CPU speed |
Clock speed |
J46 |
J48 |
|
75MHz |
50MHz |
Open |
Open |
|
90MHz |
60MHz |
Open |
Open |
|
100MHz |
50MHz |
Closed |
Open |
|
100MHz |
66MHz |
Open |
Open |
|
120MHz |
60MHz |
Closed |
Open |
|
133MHz |
66MHz |
Closed |
Open |
|
150MHz |
50MHz |
Open |
Closed |
|
150MHz |
60MHz |
Closed |
Closed |
|
HOST CLOCK SELECTION | ||
|
Speed |
J21 |
J22 |
|
50MHz |
Closed |
Closed |
|
60MHz |
Closed |
Open |
|
66MHz |
Open |
Closed |
|
CPU VOLTAGE SELECTION | |
|
Voltage |
J38 |
|
3.135v - 3.45v (standard CPU) |
Pins 1 & 2 closed |
|
3.45v - 3.6v (VRE CPU) |
Pins 2 & 3 closed |
|
3.3V POWER SUPPLY SELECTION | |||
|
Setting |
J39 |
J40 |
J47 |
|
Voltage regulator |
1 & 2, 3 & 4, 5 & 6 |
Open |
1 & 2, 3 & 4, 5 & 6 |
|
Power supply |
1 & 2, 3 & 4, 5 & 6 |
1 & 2, 3 & 4, 5 & 6 |
Open |
|
Note: Pins designated should be in the closed position. | |||
|
PCI HOST CLOCK SELECTION | |
|
Speed |
J43 |
|
50MHz |
Pins 2 & 3 closed |
|
60MHz |
Pins 1 & 2 closed |
|
66MHz |
Pins 1 & 2 closed |