Oric - Apple Disk II interface started by CALL #320

From	Andre Majorel <cheney@halliburton.com>
Newsgroups	comp.sys.oric
Subject	Oric - Apple Disk II interface started by CALL #320
Date	2014-01-14 10:45 +0000
Organization	Dirac Angestun Gesept
Message-ID	<slrnlda5b8.ito.cheney@atc5.vermine.org> (permalink)

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Jean-Marc, if you are reading this :

as I remember, the first byte in the 0x320-0x32f area was 0x78.
Turns out this is a valid 6502 instruction -- SEI, which is
something you would use before switching banks.

And I seem to remember a 0xbd somewhere too. That is another
6502 opcode (LDA absolute,x).

So yes, looks like the interface works by mapping some 6502 code
in page 3. Kinky ! Presumably, they use another part of page
3 to map the actual registers.

-- 
André Majorel http://www.teaser.fr/~amajorel/
J'ai des droits. Les autres ont des devoirs.

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Oric - Apple Disk II interface started by CALL #320 Andre Majorel <cheney@halliburton.com> - 2014-01-14 10:45 +0000

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