NORTHGATE COMPUTER SYSTEMS, INC.
SLIMLINE CACHE 25/33
Processor | 80386DX |
Processor Speed | 25/33MHz |
Chip Set | OPTI |
Max. Onboard DRAM | 16MB |
Cache | 64/256KB |
BIOS | AMI |
Dimensions | 350mm x 304mm |
I/O Options | Floppy drive interface, IDE interface, parallel port, serial ports (2), VGA port |
NPU Options | 80387/3167 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
VGA port | J1 | Serial port 2 | J10 |
Turbo LED | J3 | Parallel port | J15 |
Power LED & keylock | J4 | Floppy drive interface | J16 |
Speaker | J5 | IDE interface | J17 |
Reset switch | J6 | Riser card | R1 |
IDE interface LED | J8 | Turbo switch | W6 |
Serial port 1 | J9 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | Floppy drive interface interrupt (IRQ6) enabled | SW2/pins 11 & 12 | Closed |
Floppy drive interface interrupt (IRQ6) disabled | SW2/pins 11 & 12 | Open | |
» | Floppy drive interface DMARQ2 enabled | SW2/pins 13 & 14 | Closed |
Floppy drive interface DMARQ2 disabled | SW2/pins 13 & 14 | Open | |
» | Floppy drive interface DACK2 enabled | SW2/pins 15 & 16 | Closed |
Floppy drive interface DACK2 disabled | SW2/pins 15 & 16 | Open | |
» | Floppy drive interface enabled | SW3/pins 1 & 2 | Closed |
Floppy drive interface disabled | SW3/pins 1 & 2 | Open | |
» | Factory configured - do not alter | W1 | Open |
» | Cache enabled | W4 | Closed |
Cache disabled | W4 | Open | |
» | BIOS type select 27512 | W5 | pins 2 & 3 closed |
BIOS type select 27256 | W5 | pins 1 & 2 closed | |
» | Monitor type select monochrome | W7 | pins 1 & 2 closed |
Monitor type select color | W7 | pins 2 & 3 closed | |
» | Parallel port mode select input only | W13 | pins 2 & 3 closed |
Parallel port mode select bi-directional | W13 | pins 1 & 2 closed | |
» | Floppy drive precompensation select standard | W17 | pins 2 & 3 closed |
Floppy drive precompensation select alternate | W17 | pins 1 & 2 closed | |
» | Floppy drive mode select single speed | W18 | pins 1 & 2 closed |
Floppy drive mode select dual speed | W18 | pins 2 & 3 closed |
DRAM CONFIGURATION (PAL CHIP "A" INSTALLED AT U44) | ||
Size | Bank 0 | Bank 1 |
1MB | (4) 256K x 9 | NONE |
2MB | (4) 256K x 9 | (4) 256K x 9 |
4MB | (4) 1M x 9 | NONE |
8MB | (4) 1M x 9 | (4) 1M x 9 |
DRAM JUMPER CONFIGURATION (PAL CHIP "A" INSTALLED AT U44) | |||||
Size | W8 | W9 | W10 | W11 | SW1 |
1MB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 1 & 2, 5 & 6, 7 & 8, 9 & 10 |
2MB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 1 & 2, 5 & 6, 7 & 8 |
4MB | 1 & 2 | 2 & 3 | 1 & 2 | 2 & 3 | 7 & 8, 9 & 10 |
8MB | 1 & 2 | 2 & 3 | 1 & 2 | 2 & 3 | 7 & 8 |
Note: Pins designated should be in the closed position. |
DRAM CONFIGURATION (PAL CHIP "B" INSTALLED AT U44) | ||
Size | Bank 0 | Bank 1 |
4MB | (4) 1M x 9 | NONE |
8MB | (4) 1M x 9 | (4) 1M x 9 |
16MB | (4) 4M x 9 | NONE |
DRAM JUMPER CONFIGURATION (PAL CHIP "B" INSTALLED AT U44) | |||||
Size | W8 | W9 | W10 | W11 | SW1 |
4MB | 1 & 2 | 2 & 3 | 1 & 2 | 2 & 3 | 7 & 8, 9 & 10 |
8MB | 1 & 2 | 2 & 3 | 1 & 2 | 2 & 3 | 7 & 8 |
16MB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 5 & 6, 7 & 8, 9 & 10 |
Note: Pins designated should be in the closed position. |
CACHE CONFIGURATION | |
Size | Bank 0 |
64KB | (10) 8K x 8 |
256KB | (10) 32K x 8 |
CACHE CONFIGURATION | ||
Size | W2 | W3 |
64KB | pins 1 & 2 closed | pins 1 & 2 closed |
256KB | pins 2 & 3 closed | pins 2 & 3 closed |
IDE CONFIGURATION | ||
Setting | W20 | W21 |
Enabled | Open | Closed |
Disabled | Closed | Open |
PARALLEL PORT ADDRESS CONFIGURATION | |
Address | SW3 |
378h | Open |
3BCh | pins 11 & 12 closed |
278h | pins 9 & 10 closed |
Disabled | pins 9 & 10, 11 & 12 closed |
PARALLEL PORT IRQ CONFIGURATION | |
IRQ | SW2 |
IRQ7 | pins 9 & 10 closed |
IRQ5 | pins 7 & 8 closed |
SERIAL PORT 1 CONFIGURATION | ||
Setting | SW2 | SW3 |
Enabled | pins 5 & 6 closed | Open |
Disabled | Open | pins 7 & 8 closed |
SERIAL PORT 2 CONFIGURATION | ||
Setting | SW2 | SW3 |
Enabled | pins 3 & 4 closed | Open |
Disabled | Open | pins 3 & 4 closed |
VIDEO CONFIGURATION | |
Setting | SW5 |
Enabled | pins 1 & 2, 3 & 4, 5 & 6 closed |
Disabled | pins 7 & 8 closed |