Re: reading vic20 or c64 column

From: groepaz_at_gmx.net
Date: Tue, 30 Jun 2015 09:27:22 +0200
Message-ID: <4805569.bQn6LIFsVu@rakete>
On Tuesday 30 June 2015, 09:18:52 Didier Derny <didier@aida.org> 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 
http://unusedino.de/ec64/technical/aay/c64/keybmatr.htm)

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