David J Taylor wrote:
"A C" <agcarver+...@acarver.net> wrote in message
news:4f4c0508.2010...@acarver.net...
[]
Zilog was completely standard on sun4c and sun4m so it's neither case
of non-standard nor faulty hardware. It's just different (but
standard for the architecture). It also hasn't been fully worked
through likely because the much more recent Sun hardware had shifted
to other hardware components in an effort to reduce costs.
Eventually, of course, Sun switched architectures entirely and the
latest Sun hardware has an Intel based design rather than the orignal
Sun RISC processor designs.
OK, so non-standard architecture (for today), then!
The IBM-PC Hardware was quite the regression for the time.
The 68k and Z80 Systems had "real*" and capable IO integrated circuits.
The initial TTL bitbang stuff was really limited.
Z8035, Z8530, M68851, M68230, ..
uwe
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