Re: Calc Result ROM

From: Christian Dirks <>
Date: Sat, 12 May 2012 23:01:52 +0200
Message-ID: <>
Hi Michau,
to get the most out of such a cartridge, I think it would very useful to 
adapt your IEC kernal extension for all three available adress ranges. 
It would then be possible to use the extension together with for example 
calc result.
Also, as I already mentioned, adding bank 0 to the ram check would be nice.
Adding the CBM-II DOS Wedge ( 
would make it even more useful I think.
My assembler programming skills are not sufficient for doing so.


Am 07.05.2012 10:40, schrieb Michał Pleban:
> Steve Gray wrote:
>> I'm not sure one eprom will do. There are three 8k slots (banks) on a
>> single cartridge and a separate chip select for each. So you would have
>> to allocate 24k for each rom "set", or add additional logic to select
>> which bank you want the 8k rom to appear in. But then you'd be limited
>> to 8k. I think you would need 3 eproms so you could individually select
>> the rom for each 8k bank.
>> Alternately, you could make a cartridge with 24k ram and the ability to
>> map in rom, or just copy rom to ram somehow.
> Well, we would put three EPROMs, one for each bank. That should do 
> most probably.
> How many cartridges are there for CBM-II anyway?
> Michau.
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Christian Dirks

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Received on 2012-05-12 22:00:04

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