First post, by Intel486dx33
Rank
l33t
How can one get a standard 486 ( 168-pin CPU ) to work in a 169-pin Intel overdrive socket ?
Reply 1 of 5, by evasive
Rank
Oldbie
https://en.wikipedia.org/wiki/Intel_80486_OverDrive
So the ODP somehow will disable the onboard CPU
Here's info on how-to if your board does not have a special jumper to do so:
487SX 169pin socket: any way to use a normal 486DX2 there?
Reply 2 of 5, by mpe
Rank
Oldbie
UP# pin on the 486SX CPU needs to be connected to ground. Sometimes there is a jumper on the board for that.
Reply 3 of 5, by pentiumspeed
Rank
l33t
Pull the socket pin B14 low via ground this connects to the UP# pin on the 486SX.
Then you can use normal 486DX or DX2 CPU without need to buy a overdrive 487 which is expensive.
Cheers,
Great Northern aka Canada.
Reply 4 of 5, by Intel486dx33
Rank
l33t
pentiumspeed wrote on 2021-04-30, 14:34:Pull the socket pin B14 low via ground this connects to the UP# pin on the 486SX.
Then you can use normal 486DX or DX2 CPU without need to buy a overdrive 487 which is expensive.
Cheers,
Do you mean to pull out of socket B14 ?
Reply 5 of 5, by evasive
Rank
Oldbie
Pull low means make the signal low ( = logical zero) by connecting it to ground.