Re: Learning ARM machine code

From	Alexander Ausserstorfer <bavariasound@chiemgau-net.de>
Newsgroups	comp.sys.acorn.programmer
Subject	Re: Learning ARM machine code
Date	2025-11-15 14:55 +0200
Organization	None
Message-ID	<5c7c2864b7bavariasound@chiemgau-net.de> (permalink)
References	(4 earlier) <iKm*CnCeA@news.chiark.greenend.org.uk> <5c2adc4465bavariasound@chiemgau-net.de> <5c2cea6fccbavariasound@chiemgau-net.de> <5c75805cc6bavariasound@chiemgau-net.de> <5c758d12a5News03@avisoft.f9.co.uk>

Show all headers | View raw

In article <5c758d12a5News03@avisoft.f9.co.uk>,
   Martin <News03@avisoft.f9.co.uk> wrote:
> In article <5c75805cc6bavariasound@chiemgau-net.de>,
>    Alexander Ausserstorfer <bavariasound@chiemgau-net.de> wrote:

>> You'll find an update now here:

>> http://home.chiemgau-net.de/ausserstorfer/Temp/2025-11-02/2025-08-31_PHB.pdf

>> (around 4 megabytes now).

> I have had a very quick look at your pdf, but I have not translated
> it.  However, I have noticed some possible confusion between the ! and
> ? indirection BASIC operators...

Excuse me. I come from the Commodore 64 and do only know something about
the POKE and PEEK commands.

I don't understand the ! and ? commands. I found some PDFs online and
wonder because its about BBC BASIC but not for the Acorn Archimedes but
for a Z80 called Sinclair Spectrum and another for a Z88 system. So BBC
BASIC doesn't belong to RISC OS only?

? belongs to a byte ! belongs to a word.

With !(&9000) you can write into memory. But with the same command you
can read it!

I never have seen that before.

Try PRINT !&9000 for example

I never read about that in the GAG news for example. It is a shame.

I'm also looking for a memory map for RISC OS (I do know something about
the memory map of Commodore 64 like the commands POKE 53280,4 or 53281,0
which changes the colours of the screen) but nothing about the memory
map of RISC OS. Where can I find the adresses?

Thanks in advance,

A.

-- 
http://home.chiemgau-net.de/ausserstorfer/

Back to comp.sys.acorn.programmer | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

Learning ARM machine code Alexander Ausserstorfer <bavariasound@chiemgau-net.de> - 2025-04-12 15:11 +0200
  Re: Learning ARM machine code Harriet Bazley <harriet@bazleyfamily.co.uk> - 2025-04-13 18:27 +0100
    Re: Learning ARM machine code Jean-Michel <jmc.bruck@orange.fr> - 2025-04-14 11:40 +0200
  Re: Learning ARM machine code Theo <theom+news@chiark.greenend.org.uk> - 2025-04-14 17:56 +0100
    Re: Learning ARM machine code Alexander Ausserstorfer <bavariasound@chiemgau-net.de> - 2025-06-07 17:08 +0200
      Re: Learning ARM machine code Sebastian Barthel <naitsabes@freenet.de> - 2025-06-09 13:04 +0000
        Re: Learning ARM machine code Theo <theom+news@chiark.greenend.org.uk> - 2025-06-09 17:36 +0100
          Re: Learning ARM machine code Alexander Ausserstorfer <bavariasound@chiemgau-net.de> - 2025-06-10 18:11 +0200
            Re: Learning ARM machine code Alexander Ausserstorfer <bavariasound@chiemgau-net.de> - 2025-06-14 17:58 +0200
              Re: Learning ARM machine code Martin <News03@avisoft.f9.co.uk> - 2025-06-14 17:54 +0100
                Re: Learning ARM machine code Alexander Ausserstorfer <bavariasound@chiemgau-net.de> - 2025-06-19 06:31 +0200
                Re: Learning ARM machine code Martin <News03@avisoft.f9.co.uk> - 2025-06-19 10:09 +0100
                Re: Learning ARM machine code Jean-Michel <jmc.bruck@orange.fr> - 2025-06-19 11:32 +0200
              Re: Learning ARM machine code Alexander Ausserstorfer <bavariasound@chiemgau-net.de> - 2025-11-02 16:42 +0200
                Re: Learning ARM machine code Martin <News03@avisoft.f9.co.uk> - 2025-11-02 17:01 +0000
                Re: Learning ARM machine code Alexander Ausserstorfer <bavariasound@chiemgau-net.de> - 2025-11-15 14:55 +0200
                Re: Learning ARM machine code druck <news@druck.org.uk> - 2025-11-17 19:08 +0000
                Re: Learning ARM machine code Alexander Ausserstorfer <bavariasound@chiemgau-net.de> - 2025-11-15 15:11 +0200
                Re: Learning ARM machine code Harriet Bazley <harriet@bazleyfamily.co.uk> - 2025-11-15 19:46 +0000
                Re: Learning ARM machine code Alexander Ausserstorfer <bavariasound@chiemgau-net.de> - 2025-12-06 17:57 +0200
                Re: Learning ARM machine code Martin <News04@avisoft.f9.co.uk> - 2025-12-06 18:15 +0000
                Re: Learning ARM machine code Alexander Ausserstorfer <bavariasound@chiemgau-net.de> - 2025-12-07 16:25 +0200
                Re: Learning ARM machine code Martin <News04@avisoft.f9.co.uk> - 2025-12-07 15:57 +0000
                Re: Learning ARM machine code Alexander Ausserstorfer <bavariasound@chiemgau-net.de> - 2025-12-21 17:13 +0200
                Re: Learning ARM machine code druck <news@druck.org.uk> - 2025-12-22 20:02 +0000
                Re: Learning ARM machine code Paul Sprangers <Paul@sprie.nl> - 2025-12-22 23:32 +0100
                Re: Learning ARM machine code Alexander Ausserstorfer <bavariasound@chiemgau-net.de> - 2026-01-06 14:42 +0200
                Re: Learning ARM machine code anonymouse <na@ignoreme.com> - 2026-01-06 15:02 +0000
                Re: Learning ARM machine code Jean-Michel <jmc.bruck@orange.fr> - 2025-12-08 10:23 +0100
                Re: Learning ARM machine code Harriet Bazley <harriet@bazleyfamily.co.uk> - 2025-12-06 20:06 +0000
                Re: Learning ARM machine code druck <news@druck.org.uk> - 2025-12-09 08:21 +0000
                Re: Learning ARM machine code Martin <News04@avisoft.f9.co.uk> - 2025-12-09 09:48 +0000
                Re: Learning ARM machine code Richard Ashbery <basura@invalid.addr.uk> - 2025-12-09 10:54 +0000
                Re: Learning ARM machine code Steve Fryatt <news@stevefryatt.org.uk> - 2025-11-15 23:46 +0000
                Re: Learning ARM machine code Theo <theom+news@chiark.greenend.org.uk> - 2025-11-16 11:59 +0000
                Re: Learning ARM machine code Alexander Ausserstorfer <bavariasound@chiemgau-net.de> - 2025-12-06 18:10 +0200
                Re: Learning ARM machine code Steve Fryatt <news@stevefryatt.org.uk> - 2025-12-07 12:18 +0000
          Re: Learning ARM machine code Sebastian Barthel <naitsabes@freenet.de> - 2025-06-10 18:37 +0000

csiph-web