From: alung@megatest.com (Aaron Lung)
Subject: Re: Motorola XC68882RC33 and RC50
Organization: Megatest Corporation
Lines: 21

In article <C5qwv2.Bz0@zoo.toronto.edu> henry@zoo.toronto.edu (Henry Spencer) writes:
>In article <sgberg.23xu@charon.bloomington.in.us> sgberg@charon.bloomington.in.us (Stefan Berg) writes:
>>... I don't know why my FPU has an XC (my original 33MHz FPU
>>was label MC68882-33), but it seems to work fine on my system...
>>P.S. Or does it mean eXperimental Chip instead of Motorola Chip? .-)
>
>The rule for the designations is that if it says MC, that means it works
>*exactly* the way the datasheet/book specifies.  If it says XC, that means
>there is at least one known bug.  Often these bugs are small and obscure;
>you might never run into them in practice.
>

XC units are often pre-production sample devices.  Those are normally
distributed for evaluation as freebies and are not guaranteed to
meet every spec.

>At least Motorola admits it, unlike certain other companies...

Yep, that's for sure...that's one thing I like most about Motorola.

aaron
