Ultimate 64 kind of does that does it not, optionally streaming debug over ethernet? Granted it is not original metal. Justin > On Jun 15, 2022, at 09:50, silverdr_at_srebrnysen.com wrote: > > >>> On 2022-06-15, at 11:25, tokafondo <tokafondo_at_tokafondo.name> wrote: >>> 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? > >> On Wed, Jun 15, 2022 at 8:27 AM <silverdr_at_srebrnysen.com> wrote: >> >> Yes, it can. The "CodeRacer"[*] does this and a lot more. >> > >> On 2022-06-15, at 13:48, Bill Degnan <billdegnan_at_gmail.com> wrote: >> >> 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 > > Sure, but that's a different and somewhat "limited" use case. 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