13 Jan
2014
13 Jan
'14
9:32 p.m.
On 1/13/14, 2:57 PM, Ethan Dicks wrote:
On Mon, Jan 13, 2014 at 2:47 PM, emanuel stiebler
<emu at e-bbes.com> wrote:
I believe the 68HC000 can dynamic size down to 8-bits, so that's a more
available solution for 8 bit designs. I think I did that once.
On 2014-01-13 12:25, Ethan Dicks wrote:
It looks like
a lot of work, and I understand not want to change it
now that it's done, but given the abundance of full 68000 chips (in
numerous form factors) and the relative scarcity of 68008 chips plus
the bus bandwidth, I wouldn't have designed such an elaborate board
with an 8-bit data bus in the first place. I would have started with
16 bits (not even including the fact that the 68008 has a 1MB address
space, so you would need resort to bank switching or a custom MMU to
wedge all that stuff in there).
I'd seen that design before, but I gotta say
that with all those bells
and whistles, you might as well go full 68000 on it.
I talked to this guy, and he
is happy with it as it is. Took him a while to
do it (he did all the schematics/layouts/software himself),
so he is not eager at the moment to change it to the 16bit version.