NORTHGATE COMPUTER SYSTEMS, INC.
SLIMLINE SP
Processor | 80386DX/80486DX |
Processor Speed | 25/33MHz |
Chip Set | VLSI |
Max. Onboard DRAM | 64MB |
Cache | 64/256KB |
BIOS | AMI |
Dimensions | 350mm x 304mm |
I/O Options | Proprietary CPU/NPU module slot, parallel port, serial ports (2), floppy drive interface, IDE interface, VGA port |
NPU Options | 80387/3167/4167 (on external CPU/NPU card) |

CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Proprietary CPU module | CPU1 | Serial port 1 | J9 |
VGA port | J1 | Serial port 2 | J10 |
External battery | J2 | Parallel port LPT1 | J15 |
Turbo LED | J4 | Floppy drive interface | J16 |
Power LED & keylock | J5 | IDE interface | J17 |
Reset switch | J6 | Speaker | J19 |
IDE interface LED | J8 | Riser card | R1 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
| » | Floppy drive write precomp select alternate | W2 | pins 2 & 3 closed |
Floppy drive write precomp select normal | W2 | pins 1 & 2 closed | |
| » | Factory configured - do not alter | W3 | N/A |
| » | Monitor type select monochrome | W4 | pins 1 & 2 closed |
Monitor type select color | W4 | pins 2 & 3 closed | |
| » | CMOS memory normal operation | W8 | Open |
CMOS memory clear | W8 | Closed | |
| » | Parallel port mode select bi-directional | W13 | pins 2 & 3 closed |
Parallel port mode select input only | W13 | 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 | |
| » | Factory configured - do not alter | W27 | N/A |
| » | Factory configured - do not alter | W29 | N/A |
| » | Factory configured - do not alter | SW1 pins 1 & 2 | N/A |
| » | Factory configured - do not alter | SW1 pins 5 & 6 | N/A |
| » | VGA BIOS shadowing enabled | SW1 pins 11 & 12 | Closed |
VGA BIOS shadowing disabled | SW1 pins 11 & 12 | Open | |
| » | BIOS shadowing enabled | SW1 pins 11 & 12 | Closed |
BIOS shadowing disabled | SW1 pins 11 & 12 | Open | |
| » | IRQ6 enabled | SW2 pins 9 & 10 | Closed |
IRQ6 disabled | SW2 pins 9 & 10 | Open | |
| » | Floppy drive interface enabled | SW3 pins 1 & 2 | Open |
Floppy drive interface disabled | SW3 pins 1 & 2 | Closed | |
Note:The locations of W8 & W29 are unidentified. | |||
DRAM CONFIGURATION | ||
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 |
16MB | (4) 4M x 9 | NONE |
32MB | (4) 4M x 9 | (4) 4M x 9 |
DRAM JUMPER/SWITCH CONFIGURATION | |||
Size | SW1 | W5 | W6 |
1MB | 3 & 4, 17 & 18, 19 & 20 | 2 & 3 | 2 & 3 |
2MB | 17 & 18, 19 & 20 | 2 & 3 | 2 & 3 |
4MB | 3 & 4, 17 & 18 | 1 & 2 | 2 & 3 |
8MB | 17 & 18 | 1 & 2 | 2 & 3 |
16MB | 3 & 4 | 1 & 2 | 1 & 2 |
32MB | Open | 1 & 2 | 1 & 2 |
Note: Pins designated should be in the closed position. | |||
IDE CONFIGURATION | ||
Setting | SW21 | W20 |
Enabled | Closed | Open |
Disabled | Open | Closed |
PARALLEL PORT IRQ CONFIGURATION | |
IRQ | SW2 |
IRQ5 | pins 5 & 6 closed |
IRQ7 | pins 7 & 8 closed |
PARALLEL PORT CONFIGURATION | |
Setting | SW3 |
LPT1/3BCh | pins 9 & 10 closed |
LPT1/378h | Open |
LPT2/278h | pins 7 & 8 closed |
Disabled | pins 7 & 8, 9 & 10 closed |
SERIAL PORT 1 CONFIGURATION | ||
Setting | SW2 | SW3 |
Enabled | pins 1 & 2 closed | Open |
Disabled | Open | pins 5 & 6 closed |
SERIAL PORT 2 CONFIGURATION | ||
Setting | SW2 | SW3 |
Enabled | pins 3 & 4 closed | Open |
Disabled | Open | pins 3 & 4 closed |
VIDEO CONFIGURATION | ||
Setting | SW5 | W19 |
Enabled | pins 1 & 2, 3 & 4, 5 & 6 closed | pins 1 & 2 closed |
Disabled | Open | pins 2 & 3 closed |
BIOS CONFIGURATION | |
Setting | SW1 |
F000-FFFF (VGA BIOS disabled) | pins 7 & 8, 9 & 10 closed |
F000-FFFF, E000-EFFF (VGA BIOS disabled, BIOS shadowing enabled) | pins 7 & 8 closed |
F000-FFFF VGA BIOS at C000-C7FF | pins 9 & 10 closed |
F000-FFFF VGA BIOS at C000-C7FF, IDE interface at C800-CFFF | pins 9 & 10 closed |

CACHE CONFIGURATION | |
Size | Bank 0 |
64KB | (8) 8K x 8 |
256KB | (8) 32K x 8 |
CACHE JUMPER CONFIGURATION | |
Size | W1 |
64KB | Open |
256KB | pins 1 & 2, 3 & 4 closed |

USER CONFIGURABLE SETTINGS | |||
Setting | W3 | W4 | W5 |
Burst mode enabled | pins 2 & 3 closed | pins 2 & 3 closed | pins 1 & 2 closed |
Burst mode enabled | pins 1 & 2 closed | pins 1 & 2 closed | pins 1 & 2 closed |
CACHE CONFIGURATION | |
Size | Bank 0 |
64KB | (8) 8K x 8 |
256KB | (8) 32K x 8 |
CACHE JUMPER CONFIGURATION | |||
Size | W1 | W2 | W5 |
64KB | pins 1 & 2 closed | pins 1 & 2 closed | Open |
256KB | pins 2 & 3 closed | pins 2 & 3 closed | pins 3 & 4, 5 & 6 closed |