NCR CORPORATION
PC916SX
|
Processor |
80386SX |
|
Speed |
16MHz |
|
Chip Set |
Unidentified |
|
Max. Onboard DRAM |
1MB |
|
BIOS |
Unidentified |
|
Cache |
None |
|
Dimensions |
290mm x 106mm |
|
I/O Options |
External memory card slot |
|
NPU Options |
80387SX |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External Battery |
J2 |
Keyboard connector |
J5 |
|
Turbo LEDs & keylock |
J3 |
Proprietary external memory port |
P11 & P12 |
|
Speaker & volume control |
J4 | ||
|
USER CONFIGURABLE SETTINGS | ||||
|
Function |
Jumper/Switch |
Position | ||
| » |
Pipeline mode disabled |
JP3-I/JP3-II |
pins 2 & 3 closed | |
|
Pipeline mode enabled |
JP3-I/JP3-II |
pins 1 & 2 closed | ||
| » |
Monitor type select color |
S1 |
pins 1 & 2 closed | |
|
Monitor type select monochrome |
S1 |
pins 2 & 3 closed | ||
| » |
Power-on speed select fast |
S2 |
pins 1 & 2 closed | |
| » |
Power-on speed select slow |
S2 |
pins 2 & 3 closed | |
| » |
DRAM speed select slow |
SW3/1 |
Off | |
|
DRAM speed select fast |
SW3/1 |
On | ||
| » |
DMA speed select automatic |
SW3/2 |
Off | |
|
DMA speed select 8MHz |
SW3/2 |
On | ||
| » |
Memory 0-512KB enabled |
SW3/3 |
Off | |
|
Memory 0-256KB enabled, 256-512KB disabled |
SW3/3 |
On | ||
| » |
Memory 512-1024KB enabled |
SW3/4 |
Off | |
|
Memory 512-1024KB disabled |
SW34 |
On | ||
|
Notes:JP3-I is found on Type MMI mainboard, JP3-II is found on Type MMII mainboard. | ||||
|
DRAM CONFIGURATION | |
|
Size |
Bank 0 |
|
1MB |
(8) 44256 |
|
Note:Memory chip sizes and locations are unidentified. | |
|
DRAM - I/O SPEED CONFIGURATION | ||||
|
IOW, MEMW, MEMR |
IOR |
JP1 |
JP2 | |
| » |
500ns |
750ns |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
250ns |
500ns |
pins 2 & 3 closed |
pins 2 & 3 closed | |
|
750ns |
1000ns |
pins 1 & 2 closed |
pins 2 & 3 closed | |
|
1000ns |
1250ns |
pins 1 & 2 closed |
pins 1 & 2 closed | |
|
DRAM MAPPING CONFIGURATION | |||||
|
Extended memory |
Mapping area |
SW3/5 |
SW3/6 |
SW3/7 |
SW3/8 |
|
0MB |
100000 - 160000h |
Off |
On |
On |
On |
|
1MB |
200000 - 260000h |
On |
Off |
On |
On |
|
2MB |
300000 - 360000h |
Off |
Off |
On |
On |
|
3MB |
400000 - 460000h |
On |
On |
Off |
On |
|
4MB |
500000 - 560000h |
Off |
On |
Off |
On |
|
5MB |
600000 - 660000h |
On |
Off |
Off |
On |
|
6MB |
700000 - 760000h |
Off |
Off |
Off |
On |
|
7MB |
800000 - 860000h |
On |
On |
On |
Off |
|
8MB |
900000 - 960000h |
Off |
On |
On |
Off |
|
9MB |
A00000 - A60000h |
On |
Off |
On |
Off |
|
10MB |
B00000 - B60000h |
Off |
Off |
On |
Off |
|
11MB |
C00000 - C60000h |
On |
On |
Off |
Off |
|
12MB |
D00000 D60000h |
Off |
On |
Off |
Off |
|
13MB |
E00000 - E60000h |
On |
Off |
Off |
Off |
|
14MB |
F00000 - F60000h |
Off |
Off |
Off |
Off |