7 Sep
2023
7 Sep
'23
1:12 p.m.
On Sep 7, 2023, at 3:17 AM, Lars Brinkhoff
<lars(a)nocrew.org> wrote:
Paul Koning wrote:
(R7)+, actually; @(R7)+ is absolute. I meant "special exception" because auto
inc/dec of R6 and R7 always increments by 1, while for R0-R5 it increments by the datum
size.
paul
Even then it increments by 2, by special
exception. So 112700, 1
(movb #1,r0) fetches the instruction and increments PC by 2, then
fetches the word where the PC points and increments by 2, not 1,
again.
It's not really a special exception because immediate mode is @(R7)+.