Re: 1541C reset behaviour

From: Spiro Trikaliotis <ml-cbmhackers_at_trikaliotis.net>
Date: Mon, 15 Jan 2018 20:03:38 +0100
Message-ID: <20180115190338.iupj253cqclf4cbi@hermes.local.trikaliotis.net>
* On Mon, Jan 15, 2018 at 07:53:05PM +0100 Mia Magnusson wrote:
> Den Mon, 15 Jan 2018 18:23:44 +0100 skrev Gerrit Heitsch
> <gerrit@laosinh.s.bawue.de>:
> > On 01/15/2018 06:19 PM, Terry Raymond wrote:
> > > Can you put the 1571 better ROM mentioned into a 1541 to improve it?
> > 
> > No, the 1571 has some significant hardware differences.
> 
> The most important difference is that 1570/1571 uses the same kind of
> CIA's as in C64/C128, while all versions of 1540/1541 uses the same
> kind of VIA as in the VIC 20 and PETs.

The 1570/1571 have the same 6522 VIA as the 1540/1541.

They have an *additional* 6526 CIA, though.

(That's not true for the 1571CR, though, as found in the 128DCR. It uses
another chip.)

Regards,
Spiro.

-- 
Spiro R. Trikaliotis
http://www.trikaliotis.net/

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Received on 2018-01-15 20:00:02

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