Re: reading vic20 or c64 column

Date: Tue, 30 Jun 2015 09:27:22 +0200
Message-ID: <4805569.bQn6LIFsVu@rakete>
On Tuesday 30 June 2015, 09:18:52 Didier Derny <> wrote:
> Sorry I was not clear, I was speaking of the use of the VIA / CIA to
> read the keyboard in  VIC20/C64
> Apparently in the code I found  (code for C64) it is writing in the row
> and reading the column

that really only matters on how you look at it. the kernal keyboard scanner 
writes to port A ("rows") and reads port B ("columns") - however that isnt a 
general rule, and various programs/games work differently. (see


People can be divided into three groups: Those who make things happen, those 
who watch things happen, and those who wonder what happened. 
<John W. Newbern>

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Received on 2015-06-30 08:00:48

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