Re: "easy" 6510 question

From: silverdr_at_wfmh.org.pl
Date: Sat, 8 Feb 2020 12:16:50 +0100
Message-Id: <C46AF13D-E32C-4910-8D92-F560EBF578A7_at_wfmh.org.pl>
> On 2020-02-07, at 22:15, Spiro Trikaliotis <ml-cbmhackers_at_trikaliotis.net> wrote:
> 
> Hello,
> 
> just my 2 cents worth of guesswork:
> 
> * On Fri, Feb 07, 2020 at 09:20:29PM +0100 silverdr_at_wfmh.org.pl wrote:
> 
>> Mapping says about D6510 ($00):
>> 
>> On power-up, this register is
>> set to 239 ($EF), which indicates that all bits, except for Bit 4
>> (which senses the cassette switch), are set up for Output.
> 
> As $EF only has bit 7 unset, this sentence does not make sense. ;)

Time to refresh binary arithmetics… It's bit 4 unset there :-)


-- 
SD! 
Received on 2020-05-30 00:52:52

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