Re: Commodore PET 64K memory expansion board using with Supersoft Graphics board

From: Andy Grady <grada719_at_aol.com>
Date: Mon, 19 Feb 2018 13:13:17 +0000
Message-Id: <1C8D26AB-8392-4D54-BEA9-2CD920561A8B@aol.com>
I must correct myself…… when you save to disk it does start at $0000 and ends at the address you enter

It is not setting the start address correctly for some reason.

Andy


> On 19 Feb 2018, at 12:51, Andy Grady <grada719@aol.com> wrote:
> 
> Oh well… I tried the Add-Mon program in Vice and whilst it appears to work OK, the Save function (which is what I was after) actually saves the whole memory form $0 to $FFFF which is a little unfortunate !!
> 
> Looking at the assembly code the start and end addresses appear to be processed but not used -  not sure why
> 
> 
> Andy
> 
> 
> 
> 
> 
>> On 15 Feb 2018, at 20:03, Mia Magnusson <mia@plea.se> wrote:
>> 
>> Den Thu, 15 Feb 2018 19:58:51 +0100 skrev And Fachat <afachat@gmx.de>:
>>> I think those programs are on the 8296 system disk archive on zimmers.
>>> 
>>> The 8296 was a reconstructed version of the 8096 i.e. the 8032 with
>>> 64k expansion.
>> 
>> You all probably already know this, but anyway: The 8296 actually has
>> 128k ram. 96k is arranged the same way as an 8096 (or 8032 with 64k
>> expansion). The remaining 32k is partially used for video ram (iirc an
>> 8296 have more video ram than all other PETs), and partially with a
>> simple hardware jumper you can map ram on the areas where you otherwise
>> can have expansion ROMs.
>> 
>> So atleast in theory there might be some 8296 software that doesn't
>> work on an 8096.
>> 
>> -- 
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>> 
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> 


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Received on 2018-02-19 14:01:18

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