In article <XFMail.20060313001140.root@garbled.net>
root@garbled.net wrote:

> (I am not subscribed to tech-kern, so please CC me on replies)

Well, shouldn't you as a port maintainer? ;-p

> I was looking at mcclock_isa.c on port-prep today, and saw that many other
> ports had the same file.  Looking at them, they all seem to be essentially the
> same code, in either different orders, or various stages of bitrot.
> 
> I'm wondering if there is a technical reason we cannot make a unified
> mcclock_isa.c, and put it in dev/isa instead?
> 
> Or am I missing something fundamental about how these are each MD?

Probe functions could be identical, but attach functions would
be different because:

- Some of those ports haven't switched to MI todr(9) (and MI mc146818.c)
  and they still use their own old "struct clockfns" and MD mcclock.c
- The definition of "year of zero" is quite machine dependent
- Other configuration (BCD/BIN, 12H/24H etc.) could also be different

though the latter of two could be handled by device properties(9).
---
Izumi Tsutsui