Re: CIA Serial Data Register

Date: Mon, 23 Feb 2015 17:50:01 +0100
Message-ID: <2621255.moCInfEn16@rakete>
On Monday 23 February 2015, 12:23:15 Michael Huth <> 
> 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)


It is more profitable for your congressman to support the tobacco industry 
than your life. 
<Jackie Mason>

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Received on 2015-02-23 17:00:04

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