Re: Patching in a CBM disk drive connection in a C64 case.

From: Jim Brain <brain_at_jbrain.com>
Date: Thu, 31 Mar 2022 14:51:49 -0500
Message-ID: <eb878887-70d6-34e4-35f5-ff74c40b4a5d_at_jbrain.com>
On 3/31/2022 2:48 PM, Claudio Sánchez - Tokafondo wrote:
>
> El 31/03/2022 a las 19:05, Jim Brain escribió:
>> On 3/31/2022 12:35 PM, Claudio Sánchez - Tokafondo wrote:
>>>
>>>
>>> I think I read somewhere that CBM KERNALs are accesed not directly 
>>> but by using jump tables. Or at least that's the recommended way.
>>
>> Yep, the KERNAL jump table.  Sadly, not all apps use it.
>>
>>
>>
>
> How difficult would be to add new drive managing code to an existing 
> ROM while keeping the old one untouched? Is there room available for 
> this in the CBM computers KERNALs?
>
Not much.  Most mods delete the tape routines to make room.

Jim


-- 
Jim Brain
brain_at_jbrain.com  
www.jbrain.com
Received on 2022-03-31 22:03:50

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