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Re: Full Memory Map of Amstrad CPC 464/6128

From Rayner <usenet@magic-cookie.deletethis.co.uk.invalid>
Newsgroups comp.sys.amstrad.8bit
Subject Re: Full Memory Map of Amstrad CPC 464/6128
Date 2015-07-19 20:32 +0000
Organization A noiseless patient Spider
Message-ID <moh1ho$mme$1@dont-email.me> (permalink)
References <80dd9ab9-c2f7-4230-93b6-585966554cb3@googlegroups.com>

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In article <80dd9ab9-c2f7-4230-93b6-585966554cb3@googlegroups.com>,
 <firatsalgur@gmail.com> wrote:
>Hello,
>
>Where can I find a complete listing of CPC 6128 memory map? The ones I
>come across on the web do not include, say, the screen character buffer
>for text mode -- where the visible text on the screen is held before
>being rasterized.

The most comprehensive memory map I'm aware of is in "The Amstrad CPC
Firmware Guide", which is available online here:
http://ep.homeserver.hu/PDF/firmware.pdf. Have you already found that one?

The official firmware guide from Amstrad (SOFT 968) may also have some
useful information. There's an OCRed copy on CPCWiki, but unfortunately
it's missing some of the most useful sections (such as the memory map and
the description of the main firmware jumpblock):
http://www.cpcwiki.eu/index.php/Soft968:_CPC_464/664/6128_Firmware

I've forgotten most of what I knew about CPC system internals, but I'm not
sure there *was* a screen text buffer, just routines for printing characters
directly to screen memory (and reading them back again by comparing bit
patterns to character matrices). There was a text *input* buffer: &AC8A on
the 6128, according to the above links. I'm sure someone will correct me in
the entirely likely event that I'm wrong.

R

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Thread

Full Memory Map of Amstrad CPC 464/6128 firatsalgur@gmail.com - 2015-07-17 12:00 -0700
  Re: Full Memory Map of Amstrad CPC 464/6128 Rayner <usenet@magic-cookie.deletethis.co.uk.invalid> - 2015-07-19 20:32 +0000
  Re: Full Memory Map of Amstrad CPC 464/6128 David Cantrell <david@cantrell.org.uk> - 2015-07-20 12:53 +0100
  Re: Full Memory Map of Amstrad CPC 464/6128 Karl-Stephan Werkmeister <kastwerk@web.de> - 2015-09-03 14:01 +0200

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