286/SUPRA (MODEL C) Motherboard Settings and Configuration
INFORMTECH INTERNATIONAL, INC.
286/SUPRA (MODEL C)
Processor | 80286 |
Processor Speed | 6/8/10/12/16/20MHz |
Chip Set | C & T |
Max. Onboard DRAM | 2MB |
SRAM Cache | None |
BIOS | Award |
Dimensions | 330mm x 218mm |
I/O Options | 16-bit external memory card slot, auxillary keyboard connector |
NPU Options | 80287 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Auxiliary keyboard | J9 | Power LED & keylock | P5 |
Turbo LED | P2 | External battery | P8 |
Speaker | P3 | 16-bit external memory card | S1 |
Reset switch | P4 | ||
USER CONFIGURABLE SETTINGS | |||
Function | Jumper/Switch | Position | |
BIOS type select 27256 | J4 | pins 2 & 3 closed | |
BIOS type select 27128 | J4 | pins 1 & 2 closed | |
| » | Keyboard controller clock speed select 6MHz | J5 | pins 1 & 2 closed |
Keyboard controller clock speed select 12MHz | J5 | pins 2 & 3 closed | |
Battery type select Alkaline 4.5VDC | J7 | closed | |
Battery type select Lithium 6VDC | J7 | open | |
| » | Power good signal detect from power supply | J8 | pins 2 & 3 closed |
Power good signal detect from board | J8 | pins 1 & 2 closed | |
Monitor type select color | SW1/Switch 3 | closed | |
Monitor type select monochrome | SW1/Switch 3 | open | |
CPU SPEED/BUS CLOCK CONFIGURATION | ||||||
CPU Speed | AT Bus Speed | J2 | J3 | J10 | J13 | J14 |
20MHz | 8MHz | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 | open | open |
20MHz | 10MHz | N/A | pins 1 & 2 | pins 2 & 3 | closed | open |
20MHz | 12MHz | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 | open | open |
16MHz | 8MHz | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 | open | open |
16MHz | 12MHz | pins 2 & 3 | pins 1 & 2 | pins 1 & 2 | open | open |
12MHz | 6MHz | N/A | pins 2 & 3 | N/A | closed | open |
12MHz | 8MHz | pins 1 & 2 | pins 2 & 3 | N/A | open | open |
12MHz | 12MHz | pins 2 & 3 | N/A | N/A | open | closed |
10MHz | 10MHz | N/A | pins 1 & 2 | pins 2 & 3 | closed | closed |
8MHz | 8MHz | pins 1 & 2 | N/A | N/A | open | closed |
6MHz | 6MHz | N/A | pins 2 & 3 | N/A | closed | closed |
Note:Pins designated should be in the closed position. | ||||||
NPU CLOCK RATE CONFIGUARATION | |||
NPU | Clock Rate | SW1/Switch 1 | SW1/Switch 2 |
80287-8 | 6MHz | closed | closed |
80287-8 | 8MHz | open | closed |
80287-10 | 10MHz | closed | open |
80287-12 | 12MHz | open | open |
DRAM CONFIGURATION | ||||
Size | Bank 0 | Bank 1 | J11 | J12 |
512KB | (18) 41256 | NONE | open | open |
1MB | (18) 41256 | (18) 41256 | closed | open |
2MB | (18) 411000 | NONE | open | closed |
4MB | (18) 411000 | (18) 411000 | closed | closed |
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