30 Jul
2013
30 Jul
'13
10:17 a.m.
On Tue, Jul 30, 2013 at 11:30 AM, Eric Smith <spacewar at gmail.com> wrote:
On Tue, Jul 30, 2013 at 10:17 AM, Kyle Owen
<kylevowen at gmail.com> wrote:
No, I was assuming IEEE-696 standard with a 16-bit bidirectional data bus.
Sorry if I wasn't clear.
When I said "extra," I was trying to imply "leftover" on the RAM side
of
things. Take, for instance, the 4MB RAM board from the folks at N8VEM.
Configured for 16-bit operations, a 12-bit word will fit just fine with a
nibble left over.
Maybe we're arguing the same thing; I don't know. But the question still
stands: what would one do with a spare nibble for each word?
Correct me if I'm wrong, but the RAM would
still be 16-bits wide, from
the
processor's perspective. Hence, wouldn't
you have an extra nibble from
trying to fit the 12-bit word in a 16-bit word?
I thought originally you were trying to solve the problem of having an
"extra" nibble to find room for, when using a 12-bit processor on an
8-bit bus. If that is called "extra", then having a 12-bit processor
on a 16-bit bus has the opposite problem, which is a "missing" nibble.