21 Mar
2019
21 Mar
'19
9:36 a.m.
I thought about it during the bus ride home. I don't
think I got it right. I'll try again after the kids
go to bed.
/P
On Thu, Mar 21, 2019 at 04:37:26PM +0100, Pontus Pihlgren via cctalk wrote:
Hmm, sounds like a fun thing to figure out. How about
this for a start.
Naive, written five minutes before I have to catch my bus, untested.
I hope I understood the problem at least :)
/P
SATSUM,0
CLA CLL
TAD I SATSUM
ISZ SATSUM
TAD I SATSUM
ISZ SATSUM
SNL
JMP I SATSUM
AND (4000)
SZA
TAD (3777)
JMP I SATSUM
On Thu, Mar 21, 2019 at 12:26:37AM -0700, Kyle Owen via cctalk wrote:
> What is the shortest subroutine on a PDP-8 which will add two variables in
> RAM and return the saturated sum (that is, returning 2047 or -2048 upon
> overflow, otherwise the sum) in the accumulator?
>
> Kyle