Re: "easy" 6510 question

From: silverdr_at_wfmh.org.pl
Date: Sat, 8 Feb 2020 12:21:09 +0100
Message-Id: <B2D2957F-3846-4AC2-9E15-7C1A34D761F2_at_wfmh.org.pl>
> On 2020-02-07, at 23:36, groepaz_at_gmx.net wrote:
> 
> 
> "DDR and DATA are both initialized to 0 on powerup/reset. on the C64 pullup
> resistors are installed on bits 0,1,2,4 which gives the inital standard memory
> configuration."

That explains it fully. Question where does

"DDR and DATA are both initialized to 0 on powerup/reset"

part come from?

> see https://sourceforge.net/p/vice-emu/code/HEAD/tree/testprogs/CPU/cpuport/

Originally.

-- 
SD! 
Received on 2020-05-30 00:53:09

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