Is there ever a need to write an SVC?
There are few reasons that come to mind, and none that
are likely truly needed outside of the operating system.
Or to put it another way, is there sometimes a need to get
OS services from a problem state program like in an SVC?
Yes
And if so, are PC
The question
| Were once SVC's ok, and now they are not preferred?
could be colored naif, but it is an entirely legitimate one, and the
answer is yes.
John Gilmore, Ashland, MA 01721 - USA
If that color is mauve, and if a person such as I who asks naïve questions is
indeed naïf, then point taken. :-)
-Original Message-
From: IBM Mainframe Assembler List [mailto:ASSEMBLER-LIST@LISTSERV.UGA.EDU] On
Behalf Of John Gilmore
Sent: Thursday, February 07, 2013 3:08 PM
To:
It's just JG's usual style, first the insult, then the condescending remark,
and if you stay with it a (maybe*) useful comment (yes). (*If it hadn't been
said several times already.)
It's always somehow wonderful to hear that there are still people now trying to
learn this stuff.
Ah yes, but who can match the weary erudition embodied in his curmudgeon's
curmudgeon style?
Keven Hall
-Original Message-
From: IBM Mainframe Assembler List [mailto:ASSEMBLER-LIST@LISTSERV.UGA.EDU] On
Behalf Of David Stokes
Sent: Thursday, February 07, 2013 13:52
To:
Sorry it has taken so long to get back to this but I haven't had the time. I
still cannot get the code to undefine the DC macro. As you can see, after the
RELDEL macro is issued, the DC statement should use the assembler DC
instruction but it still invokes the RELDC macro. I don't know what
On Thu, Feb 7, 2013 at 3:43 PM, Lindy Mayfield lindy.mayfi...@sas.comwrote:
Mr. Gilmore I would consider a friend until he tells me otherwise. For
each of his erudite tit there is my inane tat. It takes two to tango.
Piazzolla is my favorite.
Cannatello tells how to write an SVC, and his
My copy of Cannatello is dated 1999. A lot has changed in 14 years. And
the index shows more than a few pages dealing with the PC instruction and PC
routines. I didn't think water cooled machines were still supported.
:: -Original Message-
:: From: IBM Mainframe Assembler List
That is double what Mr. Relson said, and people still talk about how great
Canetello's books is.
I asked a simple, honest question, and people turn it into some sort of attack
on ... I'm just too easy. I am just curious. Take whatever shots at me you
like if that make you feel good about
What I wrote was:
| The question
|| Were once SVC's ok, and now they are not preferred?
| could be colored naif, but it is an entirely legitimate one, and the
answer is yes.
It reflected my view that, while Lindy's question had been
condescended to, it was in fact an entirely legitimate one.
The problem is the RELDC OPSYN. You don't have an opcode or an OPSYN for RELDC
so why are you undefining an opcode that is not defined?
I believe you actually want DC OPSYN REALDC which will revert DC back to the
real opcode. I think (not positive) that DC OPSYN will cause unknown opcode for
DC.
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