Re: 6502-as-6509 project: update and question...

From: Gerrit Heitsch <gerrit_at_laosinh.s.bawue.de>
Date: Mon, 16 Apr 2018 17:54:39 +0200
Message-ID: <bf556b06-565c-d353-ffad-6f1d5e701b89@laosinh.s.bawue.de>
On 04/16/2018 05:23 PM, Micah Bly wrote:
> Apologies in advance for not responding to the original thread, but I 
> joined the ML too late to have an email to respond to. I've been 
> following it on the email archive.
> 
> It seemed to be making really good progress, are there any updates to 
> share?
> 
> I also wanted to ask this: the 6502 is a 1Mhz chip, the 6509 is a 2Mhz 
> chip... what are the expectations around compatibility, from that point 
> of view? It will run, but just slowly (but now maybe we can read the SID 
> registers)? Sorry if this is a dumb question.

The 6502 comes in different flavours:

6502   1MHz
6502A  2MHz
6502B  3MHz

So just use an A or B type and you're good. These are the max 
frequencies, you can always run them slower if you want.

  Gerrit
Received on 2018-04-16 18:02:18

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