UNIDENTIFIED
486NL
|
Processor |
CX486S/80486SX/CX486DX/80486DX/CX486DX2/80486DX2/Pentium Overdrive |
|
Processor Speed |
20/25/33/40/50(internal)/50/66(internal)MHz |
|
Chip Set |
OPTI |
|
Max. Onboard DRAM |
32MB |
|
Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
254mm x 220mm |
|
I/O Options |
32-bit VESA local bus slots (2) |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J6 |
Speaker |
J24 |
|
Power LED & keylock |
J20 |
Turbo switch |
JJ23 |
|
Reset switch |
J22 |
32-bit VESA local bus slots |
SL1 & SL2 |
|
Turbo LED |
J23 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
|
CMOS memory normal operation |
J1 |
pins 2 & 3 closed |
|
CMOS memory clear |
J1 |
pins 1 & 2 closed | |
|
|
Monitor type select color |
J3 |
Closed |
|
Monitor type select monochrome |
J3 |
Open | |
|
|
Cyrix CPU type select CX486DX2 |
J19 |
pins 1 & 2 closed |
|
Cyrix CPU type select CX486DX |
J19 |
pins 2 & 3 closed | |
|
|
CPU type select Intel |
J21 |
pins 2 & 3 closed |
|
CPU type select Cyrix |
J21 |
pins 1 & 2 closed | |
|
|
CPU type select PGA |
J29 |
Closed |
|
CPU type select PQFP |
J29 |
Open | |
|
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) 1M x 9 |
(4) 4M x 9 |
|
20MB |
(4) 4M x 9 |
(4) 1M x 9 |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
CACHE CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
TAG (U25) |
TAG (U26) |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(1) 8K x 8 |
NONE |
|
128KB |
(4) 32K x 8 |
NONE |
(1) 8K x 8 |
NONE |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 8K x 8 |
(1) 8K x 8 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 32K x 8 |
NONE |
|
CACHE JUMPER CONFIGURATION | ||||
|
Size |
J8 |
J9 |
J10 |
J14 |
|
64KB |
pins 2 & 3 closed |
Open |
pins 1 & 2 closed |
Open |
|
128KB |
pins 1 & 2 closed |
Closed |
pins 2 & 3 closed |
Open |
|
256KB |
pins 2 & 3 closed |
Closed |
pins 1 & 2 closed |
Closed |
|
CPU TYPE CONFIGURATION | |||
|
Type |
J11 |
J12 |
J13 |
|
80486SX |
pins 1 & 2 closed |
Open |
pins 2 & 3 closed |
|
80486DX |
pins 2 & 3 closed |
Closed |
pins 1 & 2 closed |
|
CPU SPEED CONFIGURATION | ||||
|
Speed |
J15 |
J16 |
J17 |
J18 |
|
25MHz |
Closed |
Open |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
33MHz |
Open |
Closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
40MHz |
Closed |
Closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
50iMHz |
Closed |
Open |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
50MHz |
Closed |
Open |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
66iMHz |
Open |
Closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
VESA WAIT STATE CONFIGURATION | |
|
Wait states |
J28 |
|
0 wait states |
Open |
|
1 wait state |
Closed |
|
BUS SPEED CONFIGURATION | |
|
CPU speed |
J25 |
|
<= 33MHz |
Open |
|
> 33MHz |
Closed |