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 |