AMERICAN MEGATRENDS, INC.
AMI 386SX-II
|
Processor |
80386SX |
|
Processor Speed |
20/25MHz |
|
Chip Set |
AMI |
|
Max. Onboard DRAM |
16MB |
|
Cache |
32KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
Floppy interface, IDE interface, parallel port, serial ports (2) |
|
NPU Options |
80387SX |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
IDE interface LED |
J1 |
Turbo switch |
J16 |
|
External battery |
J7 |
Parallel port |
P4 |
|
Reset switch |
J10 |
Serial port 1 |
P5 |
|
Turbo LED |
J11 |
Serial port 2 |
P6 |
|
Power LED & keylock |
J12 |
Floppy interface |
P7 |
|
Speaker |
J15 |
IDE interface |
P8 |
|
USER CONFIGURABLE SETTINGS | ||||
|
Function |
Jumper/Switch |
Position | ||
|
DRAM address sequence select bank 1, then bank 2 |
J2 |
pins 1 & 2, 3 & 4 closed | ||
|
DRAM address sequence select bank 2, then bank 1 |
J2 |
pins 2 & 3, 4 & 5 closed | ||
|
Serial port 2 select IRQ3 |
J3 |
pins 2 & 3 closed | ||
|
Serial port 2 select IRQ4 |
J3 |
pins 1 & 2 closed | ||
|
Serial port 1 select IRQ3 |
J4 |
pins 2 & 3 closed | ||
|
Serial port 1) select IRQ4 |
J4 |
pins 1 & 2 closed | ||
|
Factory configured - do not alter |
J5 |
pins 1 & 2 closed | ||
|
On board battery enabled |
J6 |
Closed | ||
|
On board battery disabled |
J6 |
Open | ||
|
Parallel port select IRQ7 |
J8 |
pins 2 & 3 closed | ||
|
Parallel port select IRQ5 |
J8 |
pins 1 & 2 closed | ||
|
Power good signal detect from power supply |
J9 |
pins 2 & 3 closed | ||
|
Power good signal detect from board |
J9 |
pins 1 & 2 closed | ||
|
Factory configured - do not alter |
J13 |
pins 2 & 3 closed | ||
|
Factory configured - do not alter |
J14 |
pins 1 & 2 closed | ||
|
CMOS memory normal operation |
J17 |
Open | ||
|
CMOS memory clear |
J17 |
Closed | ||
|
Factory configured - do not alter |
J18 |
Open | ||
|
Factory configured - do not alter |
SW1/1 |
Off | ||
|
Monitor type select color |
SW1/2 |
On | ||
|
Monitor type select monochrome |
SW1/2 |
Off | ||
|
Note : Cache is factory installed and is not configurable. The size of the cache & tag chips are unidentified. | ||||
|
DRAM CONFIGURATION | ||
|
Size |
Bank 1 |
Bank 2 |
|
1MB |
(4) 256K x 9 |
NONE |
|
2MB |
(4) 256K x 9 |
(4) 256K x 9 |
|
4MB |
(4) 1M x 9 |
NONE |
|
5MB |
(4) 1M x 9 |
(4) 256K x 9 |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |