Re: DMA successes with Verilog

From: silverdr_at_wfmh.org.pl
Date: Fri, 15 Jun 2018 00:05:35 +0200
Message-Id: <0A4ABA03-D491-4489-BEAB-BF29B56ACEC9@wfmh.org.pl>
> On 2018-06-14, at 23:38, Nejat Dilek <imruon@gmail.com> wrote:
> 
> Do CIA chips really keep the NMI low if they don't get an ACK? I don't
> think so.

This is a known (Marko did it first?) software technique for preventing NMIs coming e. g. off the RESTORE key on a 64 and spoiling the precise raster synchronisation.

-- 
SD! - http://e4aws.silverdr.com/
Received on 2018-06-15 01:00:04

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