20 Feb
2015
20 Feb
'15
5:29 p.m.
On 2/20/2015 6:11 PM, Rich Alderson wrote:
From: Johnny Billquist
Sent: Friday, February 20, 2015 4:51 PM
The hint here was 'byte operations'.
On 2015-02-21 01:44, ben wrote:
> How do handle byte operations in C like *x++
on a PDP 10?
Do you need information on how byte operations
and byte pointers work on
a PDP-10?
KCC, which is the one C compiler for the PDP-10 I
sortof know something
about, use 9 bit chars, and of course you then get four bytes to a word.
Not sure what in your question is hard to see how it is done.
Are you even certain that it is a byte operation??? All I see is an increment
of an object in memory pointed to by the variable "x". Now, had we been told what the declaration of
"x" is, the question would be
more meaningful, but if it's something less than word sized, then the byte
manipulation instructions would work just fine.
I don't use a 10 so I forgot, both left and right half's of word would
be used there.
I don't see a problem, and think that this is a
pretty weak straw man.
Rich
Rich Alderson
Vintage Computing Sr. Systems Engineer
Living Computer Museum
2245 1st Avenue S
Seattle, WA 98134
mailto:RichA at LivingComputerMuseum.org
http://www.LivingComputerMuseum.org/