30 Jul
2013
30 Jul
'13
9:17 a.m.
On Tue, Jul 30, 2013 at 11:00 AM, Eric Smith <spacewar at gmail.com> wrote:
On Mon, Jul 29, 2013 at 10:33 PM, Kyle Owen
<kylevowen at gmail.com> wrote:
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 know there has been interest in this before and
would love to help
create
a final product. A PDP-8 S-100 board using a
6100/6102 or 6120 would also
be nice. What to do with the extra nibble in RAM, though? Checksum?
The S-100 bus, in its later incarnations, supports 16-bit data by
repurposing the two eight-bit unidirectional data busses into a single
16-bit bidirectional bus. You don't have an "extra nibble", you have
a "missing nibble".