Re: DMA'ing in Commodore 64 for developing purposes.

From: Bill Degnan <billdegnan_at_gmail.com>
Date: Wed, 15 Jun 2022 09:48:43 -0400
Message-ID: <CABGJBufwvGSdbiUOXCVEteDaZXJ8kT-cbBsOgVWg=4i1yeD9zg_at_mail.gmail.com>
How about using a HESMAN cartridge to take a snapshot of RAM and then
dumping the contents of RAM to a disk?  Nothing formal, just what I needed
at the time.  I documented the process based on the CBM manual
https://www.vintagecomputer.net/browse_thread.cfm?id=287
I see no reason that you couldn't do this with a C-64 and 1541 drive too, I
hope.
Bill

On Wed, Jun 15, 2022 at 8:27 AM <silverdr_at_srebrnysen.com> wrote:

>
>
> > On 2022-06-15, at 11:25, tokafondo <tokafondo_at_tokafondo.name> wrote:
> >
> > Can't tell if this has been talked about previously.
> >
> > I was thinking if a system could be created to freeze a Commodore 64 and
> DMA'ing code/data at desired memory locations and then unfreeze it, so it
> could be tested in the real machine in real time.
> >
> > People tend to program by using emulators and once it's working there,
> burn to an easyflash or save to a whatever disk or tape file and then run
> in the machine, many times finding mostly with VIC-II dark magic that what
> worked beautifully in the emulator doesn't do it in the real machine.
> >
> > Can it be done?
>
> Yes, it can. The "CodeRacer"[*] does this and a lot more.
>
> * - Vapourware so far due to chipageddon but protos are there ;-)
>
Received on 2022-06-15 16:00:07

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