Re: Test suite for 6509 processor

From: smf <smf_at_null.net>
Date: Mon, 26 Feb 2018 08:22:39 +0000
Message-ID: <3d4bfdfc-c35b-704c-46ef-0ec2b653d307@null.net>
When I say any bank, I mean using the indirect instructions that let you 
access data in a different bank.

It also sounds like it's impossible to read location 0/1 of any bank 
that the 8088 card has written, because it will always come from the 
bank switch registers.

On 26/02/2018 08:18, smf wrote:
> From my understanding of what has been said here:
>
> Writing to 0 in any bank will cause the 6509 to start executing code 
> in another bank & there won't be any code there for it.
>
> The value written to 0/1 in any bank doesn't end up in ram because the 
> cpu doesn't drive the data bus.
>
> But maybe I'm wrong.
>
>
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Received on 2018-02-26 10:00:23

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