NEC TECHNOLOGIES, INC.
POWERMATE SX/20
|
Processor |
80386SX |
|
Processor Speed |
20MHz |
|
Video Processor |
Unidentified |
|
Chipset |
NEC |
|
Maximum Onboard Memory |
12MB DRAM (8MB on memory card, 2MB on memory module) |
|
Maximum Video Memory |
256KB DRAM (exact location unidentified) |
|
BIOS |
NEC |
|
Dimensions |
254 x 218mm |
|
I/O Options |
32-bit memory card slot (2), CPU card slot, PS/2 mouse port, floppy drive interface, IDE interface, parallel port, serial port, VGA daughterboard header |
|
NPU Options |
80387SX |
|
Video Types Supported |
VGA |
|
Highest Resolution Supported |
800 x 600 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
PS/2 mouse port |
CN1 |
Header to mainboard CN8A |
CN8B |
|
Keyboard connector |
CN2 |
DC power out connector |
CN9 |
|
VGA port |
CN3 |
DC power out connector |
CN10 |
|
Serial port |
CN4 |
Speaker |
CN11 |
|
Parallel port |
CN5 |
Front panel connector |
CN12 |
|
IDE interface |
CN6 |
Memory module header |
CN13 |
|
Floppy drive interface |
CN7 |
VGA card header |
CN14 |
|
CPU card header |
CN8A |
32-bit external memory card |
SL2 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Label |
Position | |
|
|
Password normal operation |
J1 |
Pins 2 & 3 closed |
|
Password clear |
J1 |
Pins 1 & 2 closed | |
|
|
IDE interface enabled |
J2 |
Pins 2 & 3 closed |
|
IDE interface disabled |
J2 |
Pins 1 & 2 closed | |
|
|
Serial port interrupt set to IRQ4 |
J3 |
Pins 2 & 3 closed |
|
Serial port interrupt set to IRQ3 |
J3 |
Pins 1 & 2 closed | |
|
|
Monitor type select color |
SW1/1 |
On |
|
Monitor type select monochrome |
SW1/1 |
Off | |
|
|
Floppy controller address set to 370h |
SW1/2 |
On |
|
Floppy controller address set to 270h |
SW1/2 |
Off | |
|
|
Floppy drive interface enabled |
SW1/3 |
On |
|
Floppy drive interface disabled |
SW1/3 |
Off | |
|
|
Serial port address set to 3F8h (COM1:) |
SW1/4 |
On |
|
Serial port address set to 2F8h (COM2:) |
SW1/4 |
Off | |
|
|
Serial port enabled |
SW1/5 |
On |
|
Serial port disabled |
SW1/5 |
Off | |
|
|
Parallel port enabled |
SW1/6 |
On |
|
Parallel port disabled |
SW1/6 |
Off | |
|
|
Keyboard D1 signal intercepted |
SW1/7 |
On |
|
Keyboard D1 signal not intercepted |
SW1/7 |
Off | |
|
|
Memory from 512KB to 640KB enabled |
SW1/9 |
Off |
|
Memory from 512KB to 640KB disabled |
SW1/9 |
On | |
|
|
Mouse port enabled |
SW1/10 |
On |
|
Mouse port disabled |
SW1/10 |
Off | |
|
ON-BOARD VIDEO CONFIGURATION | |||
|
Setting |
J8 |
SW1/8 | |
|
Disabled |
Pins 1 & 2 closed |
Off | |
|
Enabled |
Pins 2 & 3 closed |
On | |
|
DRAM CONFIGURATION |
|
There is 2MB of DRAM installed on the mainboard. This memory is not configurable. |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Label |
Position | |
|
|
Factory configured - do not alter |
SW1/5 |
Off |
|
|
Factory configured - do not alter |
SW1/6 |
Off |
|
DRAM CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
2MB |
(2) 1M x 9 |
None |
None |
None |
|
4MB |
(2) 1M x 9 |
(2) 1M x 9 |
None |
None |
|
6MB |
(2) 1M x 9 |
(2) 1M x 9 |
(2) 1M x 9 |
None |
|
8MB |
(2) 1M x 9 |
(2) 1M x 9 |
(2) 1M x 9 |
(2) 1M x 9 |
|
DRAM SWITCH CONFIGURATION | ||||
|
Size |
SW1/1 |
SW1/2 |
SW1/3 |
SW1/4 |
|
2MB |
On |
Off |
Off |
Off |
|
4MB |
On |
On |
Off |
Off |
|
6MB |
On |
On |
On |
Off |
|
8MB |
On |
On |
On |
On |