486ZXP Motherboard Settings and Configuration
NORTHGATE COMPUTER SYSTEMS, INC.
486ZXP
Processor | 80486SX/80486DX/80486DX2 |
Processor Speed | 16/20/25/33/50(internal)/66(internal)MHz |
Chip Set | OPTI |
Max. Onboard DRAM | 32MB |
Cache | 64/256KB |
BIOS | AMI |
Dimensions | 330mm x 218mm |
I/O Options | Parallel port, serial ports (2), floppy drive interface, IDE interface |
NPU Options | 4167 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Parallel port | J1 | Turbo LED | JP3 |
Serial port 1 | J2 | Reset switch | JP4 |
Serial port 2 | J3 | Speaker | JP5 |
Floppy drive interface | J4 | IDE interface LED | JP6 |
IDE interface | J5 | External battery | JP22 |
Power LED & keylock | JP2 | ||
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
Monitor type select color | JP1 | Closed | |
Monitor type select monochrome | JP1 | Open | |
| » | Parallel port IRQ select LPT1/IRQ7 | JP19 | pins 2 & 3 closed |
Parallel port IRQ select LPT2/IRQ5 | JP19 | pins 1 & 2 closed | |
| » | I/O ports enabled | JP20 | pins 1 & 2 closed |
I/O ports disabled | JP20 | pins 2 & 3 closed | |
| » | Battery type select internal | JP21 | pins 2 & 3 closed |
Battery type select external | JP21 | pins 1 & 2 closed | |
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 |
5MB | (4) 256K x 9 | (4) 1M x 9 |
8MB | (4) 1M x 9 | (4) 1M x 9 |
16MB | (4) 4M x 9 | NONE |
20MB | (4) 4M x 9 | (4) 1M x 9 |
32MB | (4) 4M x 9 | (4) 4M x 9 |
Note:Systems being used as file servers should not use the 5MB or 20MB configurations. | ||
CACHE CONFIGURATION | |
Size | Bank 0 |
64KB | (8) 64K x 1 |
256KB | (8) 64K x 4 |
CACHE JUMPER CONFIGURATION | ||||
Size | JP7 | JP11 | JP12 | JP13 |
64KB | Open | Open | Open | Open |
256KB | Closed | Closed | Open | Closed |
CPU TYPE CONFIGURATION | |||
Type | JP8 | JP9 | JP10 |
80486SX | Open | pins 2 & 3 closed | Open |
80486DX | pins 1 & 2 closed | pins 1 & 2 closed | Closed |
80486DX2 | pins 2 & 3 closed | pins 1 & 2 closed | Closed |
CPU SPEEDCONFIGURATION | ||||
Speed | JP14 | JP15 | JP16 | JP17 |
16MHz | pins 2 & 3 closed | pins 2 & 3 closed | pins 2 & 3 closed | pins 1 & 2 closed |
20MHz | pins 2 & 3 closed | pins 1 & 2 closed | pins 2 & 3 closed | pins 1 & 2 closed |
25MHz | pins 2 & 3 closed | pins 2 & 3 closed | pins 1 & 2 closed | pins 2 & 3 closed |
33MHz | pins 2 & 3 closed | pins 1 & 2 closed | pins 1 & 2 closed | pins 2 & 3 closed |
50iMHz | pins 2 & 3 closed | pins 2 & 3 closed | pins 1 & 2 closed | pins 2 & 3 closed |
66iMHz | pins 2 & 3 closed | pins 1 & 2 closed | pins 1 & 2 closed | pins 2 & 3 closed |
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