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Path: utzoo!utgpu!water!watnot!watmath!clyde!rutgers!cbmvax!carolyn
From: carolyn@cbmvax.UUCP
Newsgroups: comp.sys.amiga
Subject: Re: Questions on windows/messages
Message-ID: <1449@cbmvax.cbmvax.cbm.UUCP>
Date: Fri, 20-Feb-87 18:21:17 EST
Article-I.D.: cbmvax.1449
Posted: Fri Feb 20 18:21:17 1987
Date-Received: Sat, 21-Feb-87 10:43:02 EST
References: <1828@cit-vax.Caltech.Edu>
Reply-To: carolyn@cbmvax.UUCP (Carolyn Scheppner)
Distribution: world
Organization: Commodore Technology, West Chester, PA
Lines: 31
Keywords: Console device  Windows  Screens

In article <1828@cit-vax.Caltech.Edu> lyles@tybalt.caltech.edu (Lyle N. Scheer) writes:

>First, how do you attach a console device to your window??  From what I see,
>you can open the Console device, but there doesn't seem to be a spot to
>specify which window to direct the output to.
>
>Second, how do you get different tasks to use the same custom screen??  I
>want to write a program that runs several tasks, each placing windows in the
>same custom screen, how to I pass this pointer(message ports? If so, it seems
>that I can only pass an address and a length through them, how do I convert
>this back to data(I am using Modula-2)??)

  See the console.device example in the A/W Rom Kernel Libs&Devs manual.
On p. 316-317 you can see that the window pointer and its size (4)
are stored in the io_Data and io_Length fields of the ioRequest passed
to OpenDevice();

  As for how to "convert an address back to data" I don't know Modula-2
so I can't help you there.

  If you passed a screen pointer in the io_Data field of a Message:

  In C it would be  screen = (struct Screen *)ioReq->io_Data.
  In Basic, screen& = PEEKL(address of the io_Data).
  
-- 
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