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From: gl8f@astsun9.astro.Virginia.EDU (Greg Lindahl)
Newsgroups: comp.sys.atari.st
Subject: Re: How can I find current DTA address w/o using TRAP #1?
Message-ID: <1990Oct6.030223.10558@murdoch.acc.Virginia.EDU>
Date: 6 Oct 90 03:02:23 GMT
References: <5429@bdt.UUCP> <ROEDER.90Oct1153314@robin.cs.uni-sb.de>
Sender: news@murdoch.acc.Virginia.EDU
Organization: Department of Astronomy, University of Virginia
Lines: 18

In article <ROEDER.90Oct1153314@robin.cs.uni-sb.de> roeder@robin.cs.uni-sb.de (Edgar &) writes:
>In article <5429@bdt.UUCP> ADAM_TILGHMAN@bdt.UUCP writes:
>
>> I can't find the current DTA address;  is there any way that I can
>> do this while processing a TRAP #1?
>
>The current process' DTA address is recorded in the basepage which can
>be derived from the act_pd system variable (this in turn is recorded
>in the sys_base (the first few bytes after the ROM-start) for TOS
>versions >= 1.2).

But I thought this is an "unofficial" way of finding the DTA, so it
may break someday.

Watching all SETDTA traps, on the other hand, will always work.

--
"Restraint, hell. I'm just too fucking busy." -- Bill Wisner