afg@cbnewsl.ATT.COM (andrew.goldberg) (05/02/89)
Does anyone know *exactly* what the differences are between the 80386 DX step and the B1 step ? Andy Goldberg AT&T Bell Laboratories Parsippany, New Jersey afg%vilya@research.att.com
mcdonald@uxe.cso.uiuc.edu (05/04/89)
>Does anyone know *exactly* what the differences are >between the 80386 DX step and the B1 step ? Yes, Intel does. IBM PROBABLY does, though you never know with them. Certainly, most certainly, God knows. Other than that, the DX step is supposed to fix a problem with the machine (mostly Model 80's) locking up if ALL of the following happen: Running in native 386 or virtual 86 mode Paging is enabled certain sequences of 80387 and 80386 instructions are used My Model 80 had the problem until a new motherboard with a DX chip was installed. Doug McDonald