Re: CIA Serial Data Register

From: groepaz_at_gmx.net Date: Mon, 23 Feb 2015 17:50:01 +0100 Message-ID: <2621255.moCInfEn16@rakete>

On Monday 23 February 2015, 12:23:15 Michael Huth <enigma@mail.lipsia.de> 
wrote:
> Hallo,
> 
> from my experience quite a few routines for hardware extensions used the
> CIA SDR register as temporary memory. (e.g. the IEEE488 interface
> published in 64er magazine) Since this register is by default unused it
> was a top candidate to be used.

i have also seen at least one occurance of it being used as a short interval 
timer (write value to shift register, get IRQ some time later)

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