RE: ROM Dump of Amiga Keyboard controller

From: Martin Hoffmann-Vetter <martinHV_at_arcor.de>
Date: Tue, 19 Aug 2014 20:02:22 +0200
Message-ID: <006201cfbbd7$b9f44570$6800a8c0@mhv.webmade.com>
Hello Jim,

> As a last ditch effort, I #ifdefed the new version of the code out and
> used the original byte-at-a-time code...
> 
> Which worked :-)

Congratulation!

> 6570-036:

> 6571-036 (328191-02):

This is strange. The part number 328191-02 is documented for the 6570-036 for Amiga 500 and 2000. There also exists a 6570-033 with the part number 328191-01 for Amiga 1000. If the 6571 has the part number 328191-02 it must be intercangeable to the 6570!

> So, according to this, the 2 CPUs have the same code in them.

This is possible, the mask number 036 is identically. The question is, what's the difference between 6570 and 6571? The 6571 exists as plcc version, too. Most usage of the 6571 is plcc. So it's possible the 6571 is only an other production of the 6570, nothing else is changed.

Martin


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Received on 2014-08-19 19:00:03

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