PC916SX Motherboard Settings and Configuration
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 |
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