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000002_crash!mars.let.uva.nl!wouter_Fri, 2 Jul 93 13:46:51 PST.msg
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1994-05-26
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Date: Fri, 2 Jul 1993 21:47:25 +0200
Message-Id: <199307021947.AA14561@mars.let.uva.nl>
X-Organisation: Department of Computational Linguistics,
University of Amsterdam
Spuistraat 134, 1012 VB Amsterdam, The Netherlands
From: Wouter van Oortmerssen <wouter@mars.let.uva.nl>
To: amigae@bkhouse.cts.com
Subject:
[actually two replies]
>> Is there a safe, compatible way to access the Custom chip registers in
>> E? 'C' compilers usually provide an 'extern struct Custom *custom' or some
>> such. CBM reckon we shouldn't use absolute addresses (except ExecBase) so
>> how do you find the address of the registers? (I've looked in the Rom Kernel
>> Manuals with no success...)
the custom chip base is $DFF000, and there is generally no system-
friendly way to get this value, though next to $4, $DFF000 has been
well accepted as a fixed address, even by commodore (just see the
1.3 hardware-reference manual)
just check hardware/custom.m for the offsets.
to be really system friendly however, would be to first get
access through the device/library/resource that handles a certain
register, then start poking. for example, first call OwnBlitter()
before accessing BLTSIZE etc.
>> May I take this opportunity to recommend Wouter's text editor MegaEd for
>> writing code. It has a number of unique, useful features. I use it to strip
>> the first 'X' on lines of a shar archive by shifting blocks left!
I tried to explain this in a mail some time ago: MegaEd is not as
wonderfull as it may seem from it's endless list of features.
It has some unrepairable bugs that _might_ cause it to crash.
Therefore, I advice to use MegaEd only for small jobs that need
the powerfull text-manipulation features not found in any other editor,
but for regular source editing use another editor.
>> ---
>> _____ _
>> / / | / /
>> / /__/ /__/ Jason R. Hulance
>> / /\ / / <m88jrh@uk.ac.oxford.ecs>
>> |_/ . / \ . / / .
---------------
>> Anyone know of an Amiga emulator for the Sparc Sun? Sun used to use the 6803
>> CPU in their workstations, but now they use a Sparc. All I really want to do
is
>> get a CLI environment, no Intuition or Graphics, so's I can run EC :) -- Bar
y
If someone sends me a free 680x0 sun with tech-manuals and a macro assembler,
I'll start porting! :-)
Wouter
____ Wouter van Oortmerssen, Wouter@alf.let.uva.nl
/ __/ "Einen Satz verstehen, heisst, wissen was der Fall ist,
/ __/ wenn er wahr ist" - Wittgenstein
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