AMERICAN MEGATRENDS, INC.
ATLAS PCI PENTIUM ISA
|
Processor |
Pentium |
|
Processor Speed |
90/100MHz |
|
Chip Set |
American Megatrends |
|
Max. Onboard DRAM |
128MB |
|
Cache |
256/512KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit PCI bus slots (4), floppy drive interface, IDE interface (2), green PC feature, parallel port, PS/2 mouse port, serial ports (2), green PC monitor connector |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Green PC power connector |
J1 |
Power LED & keylock |
J15 |
|
Serial port 1 |
J4 |
Speaker |
J17 |
|
Serial port 2 |
J5 |
Reset switch |
J18 |
|
Parallel port |
J7 |
Turbo switch |
J20 |
|
Floppy drive interface |
J8 |
Turbo LED |
J24 |
|
IDE interface (secondary) |
J10 |
Green PC monitor connector |
J25 |
|
IDE interface (primary) |
J11 |
IDE interface IDE |
J28 |
|
PS/2 mouse port |
J13 |
32-bit PCI bus slots |
SL1 - SL4 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
|
Cache memory type select write back |
J29 |
Open |
|
Cache memory type select write through |
J29 |
Closed | |
|
|
Parallel port IRQ select IRQ7 |
J37 |
pins 1 & 2 closed |
|
Parallel port IRQ select IRQ5 |
J37 |
pins 2 & 3 closed | |
|
|
Serial port 2 IRQ select IRQ3 |
J38 |
pins 1 & 2 closed |
|
Serial port 2 IRQ select IRQ4 |
J38 |
pins 2 & 3 closed | |
|
|
Serial port 1 IRQ select IRQ4 |
J39 |
pins 1 & 2 closed |
|
Serial port 1 IRQ select IRQ3 |
J39 |
pins 2 & 3 closed | |
|
|
Onboard mouse IRQ12 enabled |
J40 |
pins 1 & 2 closed |
|
Bus mouse IRQ12 enabled |
J40 |
pins 2 & 3 closed | |
|
|
Factory configured - do not alter |
J47 |
Open |
|
|
CMOS memory normal operation |
J48 |
Open |
|
CMOS memory clear |
J48 |
Closed | |
|
|
Factory configured - do not alter |
J51 |
Open |
|
DRAM CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
2MB |
(2) 256K x 36 |
NONE |
|
4MB |
(2) 256K x 36 |
(2) 256K x 36 |
|
4MB |
(2) 512K x 36 |
NONE |
|
8MB |
(2) 512K x 36 |
(2) 512K x 36 |
|
8MB |
(2) 1M x 36 |
NONE |
|
16MB |
(2) 1M x 36 |
(2) 1M x 36 |
|
16MB |
(2) 2M x 36 |
NONE |
|
20MB |
(2) 512K x 36 |
(2) 2M x 36 |
|
32MB |
(2) 2M x 36 |
(2) 2M x 36 |
|
32MB |
(2) 4M x 36 |
NONE |
|
36MB |
(2) 512K x 36 |
(2) 4M x 36 |
|
40MB |
(2) 1M x 36 |
(2) 4M x 36 |
|
48MB |
(2) 2M x 36 |
(2) 4M x 36 |
|
64MB |
(2) 4M x 36 |
(2) 4M x 36 |
|
64MB |
(2) 8M x 36 |
NONE |
|
80MB |
(2) 2M x 36 |
(2) 8M x 36 |
|
128MB |
(2) 8M x 36 |
(2) 8M x 36 |
|
128MB |
(2) 16M x 36 |
NONE |
|
CACHE CONFIGURATION | |
|
Size |
Bank 0 |
|
256KB |
(8) 32K x 8 |
|
512KB |
(8) 64K x 8 |
|
CACHE JUMPER CONFIGURATION | |||
|
Size |
J21 |
J22 |
J23 |
|
256KB |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
512KB |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
CPU OUTPUT SIGNAL BUFFER CONFIGURATION | ||
|
Output signal buffer |
J30 |
J32 |
|
Normal system |
Open |
Open |
|
Loaded system |
Closed |
Open |
|
Extra loaded system |
Closed |
Closed |
|
CPU SPEED CONFIGURATION | |
|
Speed |
JP33 |
|
60/66/90i/100iMHz |
Closed |
|
50/100iMHz |
Open |
|
3.3 VOLT POWER SOURCE CONFIGURATION (INTERNAL) | ||
|
J3 |
J34 |
P3 & P4 |
|
Open |
pins 1 & 2, 3 & 4, 5 & 6 closed |
Open |
|
3.3 VOLT POWER SOURCE CONFIGURATION (EXTERNAL) | ||
|
J3 |
J34 |
P3 & P4 |
|
pins 1 & 2, 3 & 4, 5 & 6 closed |
Open |
Closed |
|
PARALLEL PORT DMA CONFIGURATION | ||
|
DMA channel |
J43 |
J44 |
|
None |
Open |
Open |
|
DRQ0 |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
DRQ1 |
pins 3 & 4 closed |
pins 3 & 4 closed |
|
DRQ3 |
pins 5 & 6 closed |
pins 5 & 6 closed |