Re: ROM Dump of Amiga Keyboard controller

From: Gerrit Heitsch <gerrit_at_laosinh.s.bawue.de>
Date: Sat, 05 Jul 2014 18:13:58 +0200
Message-ID: <53B82446.1060907@laosinh.s.bawue.de>
On 07/05/2014 03:52 AM, Jim Brain wrote:
> On 7/4/2014 7:37 PM, Martin Hoffmann-Vetter wrote:
>> Hello Jim,
>>
>>> And, I found that I had accidentally turned on JTAG on this AVR via
>>> the fuse settings, and so the incorrect opcodes were being sent.
>>> Fixed, and...
>>>
>>> SUCCESS!
>> Congratulation!
>>
>> Which version of mc did you have used? There are two known version
>> with part
>> number 325340-01 and 325340-03.
>>
>> Martin
>>
>>
>>         Message was sent through the cbm-hackers mailing list
> -01
>
> but, I found an -03 in another 1520 here:
>
> Some pages are different:

Hm, according to the datasheet, the 6500/1 has the ROM located at 
$0800-$0FFF. So unless it's wrong, it doesn't make sense to dump any 
other pages than 8 to F. Unassigned space will read whatever is on the 
bus at that moment (like reading unassigned space in the C64) and the 
RAM and I/O contents don't matter.

Page 0 and 1 are most likely the 64 Bytes RAM mirrored multiple times.

  Gerrit




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Received on 2014-07-05 17:00:39

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