NORTHGATE COMPUTER SYSTEMS, INC.
486E
|
Processor |
80486SX/80487SX/80486DX/80486DX2 |
|
Processor Speed |
20/25/33/50/50(internal)/66(internal)MHz |
|
Chip Set |
OPTI |
|
Max. Onboard DRAM |
128MB |
|
Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
None |
|
NPU Options |
4167 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
IDE interface LED |
J4 & J5 pins 10 & 20 |
Turbo LED |
J5 pins 8 & 18 |
|
Speaker |
J5 pins 1 - 4 |
Reset switch |
J5 pins 9 & 19 |
|
Turbo switch |
J5 pins 7 & 17 |
Power LED & keylock |
J5 pins 11 - 15 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
Monitor type select color |
JP5 |
Closed | |
|
Monitor type select monochrome |
JP5 |
Open | |
|
EISA EXRDY to CHRDY conversion disabled |
JP7 |
Open | |
|
EISA EXRDY to CHRDY conversion enabled |
JP7 |
Closed | |
|
DRAM CONFIGURATION | ||
|
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 |
|
20MB |
(4) 4M x 9 |
(4) 1M x 9 |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
64MB |
(4) 16M x 9 |
NONE |
|
128MB |
(4) 16M x 9 |
(4) 16M x 9 |
|
Note:When upgrading to 128MB, you must increase the cache to 256KB. | ||
|
CACHE CONFIGURATION | |||||
|
Size |
Bank 0 |
Bank 1 |
TAG (U39) |
TAG (U41) |
TAG (U50) |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(1) 8K x 8 |
(1) 16K x 1 |
(1) 16K x 1 |
|
128KB |
(4) 32K x 8 |
NONE |
(1) 8K x 8 |
(1) 16K x 1 |
(1) 16K x 1 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 32K x 8 |
(1) 16K x 1 |
(1) 16K x 1 |
|
CACHE JUMPER CONFIGURATION | ||||||
|
Size |
RNA1 |
RNA2 |
RNB1 |
RNB2 |
RNC1 |
RNC2 |
|
64KB |
Installed |
Installed |
Not installed |
Not installed |
Not installed |
Not installed |
|
128KB |
Not installed |
Not installed |
Installed |
Installed |
Not installed |
Not installed |
|
256KB |
Not installed |
Not installed |
Not installed |
Not installed |
Installed |
Installed |
|
CPU TYPE CONFIGURATION | ||||
|
Type |
RBA |
RBB |
RBC |
W4 |
|
80486SX |
Installed |
Not installed |
Not installed |
Closed |
|
80487SX |
Not installed |
Installed |
Not installed |
Open |
|
80486DX |
Not installed |
Not installed |
Installed |
Open |
|
80486DX2 |
Not installed |
Not installed |
Installed |
Open |
|
CPU SPEED CONFIGURATION | ||||
|
Speed |
JP1 |
JP2 |
JP3 |
JP4 |
|
20MHz |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
25MHz |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
33MHz |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
50iMHz |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
50MHz |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
66iMHz |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |