NORTHGATE COMPUTER SYSTEMS, INC.
ZXP EISA/VESA
|
Processor |
80486SX/80487SX/80486DX/ODP486SX/80486DX2 |
|
Processor Speed |
20/25/33/50(internal)/50/66(internal)MHz |
|
Chip Set |
SIS |
|
Max. Onboard DRAM |
256MB |
|
Cache |
64/128/256/512KB |
|
BIOS |
AMI/Phoenix |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit VESA local bus slots (3) |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Reset switch |
J6 |
Turbo switch |
J22 |
|
Speaker |
J8 |
Turbo LED |
J24 |
|
Power LED & keylock |
J9 |
32-bit VESA local bus slots |
SL1 - SL3 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
|
Monitor type select color |
J7 |
Closed |
|
Monitor type select monochrome |
J7 |
Open | |
|
DRAM CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
1MB |
(1) 256K x 36 |
NONE |
NONE |
NONE |
|
2MB |
(1) 256K x 36 |
(1) 256K x 36 |
NONE |
NONE |
|
2MB |
(1) 512K x 36 |
NONE |
NONE |
NONE |
|
4MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 512K x 36 |
NONE |
|
4MB |
(1) 512K x 36 |
NONE |
(1) 512K x 36 |
NONE |
|
4MB |
(1) 1M x 36 |
NONE |
NONE |
NONE |
|
6MB |
(1) 512K x 36 |
(1) 512K x 36 |
(1) 256K x 36 |
NONE |
|
6MB |
(1) 512K x 36 |
NONE |
(1) 1M x 36 |
NONE |
|
8MB |
(1) 1M x 36 |
(1) 1M x 36 |
NONE |
NONE |
|
8MB |
(1) 2M x 36 |
NONE |
NONE |
NONE |
|
10MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
|
10MB |
(1) 512K x 36 |
NONE |
(1) 1M x 36 |
(1) 1M x 36 |
|
12MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
NONE |
|
16MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 1M x 36 |
|
16MB |
(1) 2M x 36 |
NONE |
(1) 2M x 36 |
NONE |
|
16MB |
(1) 4M x 36 |
NONE |
NONE |
NONE |
|
18MB |
(1) 256K x 36 |
(1) 256K x 36 |
(1) 4M x 36 |
NONE |
|
18MB |
(1) 512K x 36 |
NONE |
(1) 4M x 36 |
NONE |
|
20MB |
(1) 1M x 36 |
(1) 4M x 36 |
NONE |
NONE |
|
24MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 4M x 36 |
NONE |
|
32MB |
(1) 4M x 36 |
(1) 4M x 36 |
NONE |
NONE |
|
34MB |
(1) 512K x 36 |
NONE |
(1) 4M x 36 |
(1) 4M x 36 |
|
36MB |
(1) 1M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
NONE |
|
40MB |
(1) 1M x 36 |
(1) 1M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
48MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
NONE |
|
64MB |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
(1) 4M x 36 |
|
64MB |
(1) 16M x 36 |
NONE |
NONE |
NONE |
|
128MB |
(1) 16M x 36 |
(1) 16M x 36 |
NONE |
NONE |
|
172MB |
(1) 16M x 36 |
(1) 16M x 36 |
(1) 16M x 36 |
NONE |
|
256MB |
(1) 16M x 36 |
(1) 16M x 36 |
(1) 16M x 36 |
(1) 16M x 36 |
|
CACHE CONFIGURATION | |||
|
Size |
Bank 0 |
Bank 1 |
TAG |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(1) 64K x 1 |
|
128KB |
(4) 32K x 8 |
NONE |
(1) 64K x 1 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 64K x 1 |
|
512KB |
(4) 128K x 8 |
NONE |
(1) 64K x 1 |
|
Note: The location of the TAG socket is unidentified. | |||
|
CACHE JUMPER CONFIGURATION | ||||||||
|
Size |
JC1 |
JC2 |
JC3 |
JC4 |
JC5 |
JC6 |
JC7 |
JC9 |
|
64KB |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
2 & 3 |
|
128KB |
2 & 3 |
2 & 3 |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
2 & 3 |
1 & 2 |
|
256KB |
2 & 3 |
2 & 3 |
2 & 3 |
1 & 2 |
1 & 2 |
2 & 3 |
2 & 3 |
4 & 5 |
|
512KB |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
2 & 3 |
1 & 2 |
|
Note: Pins designated should be in the closed position. | ||||||||
|
CPU TYPE CONFIGURATION | |||
|
Type |
J1 |
J2 |
J3 |
|
80486SX |
Closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
ODP486SX |
Closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
80487SX |
Closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
80486DX/DX2 |
Open |
Open |
pins 1 & 2 closed |
|
CPU SPEED CONFIGURATION | |||||
|
Speed |
JL2 |
JO1 |
JO2 |
JO3 |
JO4 |
|
20MHz |
Open |
Open |
Closed |
Closed |
Closed |
|
25MHz |
Open |
Closed |
Open |
Closed |
Closed |
|
33MHz |
Open |
Closed |
Closed |
Open |
Closed |
|
50iMHz |
Open |
Closed |
Open |
Closed |
Closed |
|
50MHz |
Closed |
Open |
Open |
Open |
Open |
|
66iMHz |
Open |
Closed |
Closed |
Open |
Closed |