Can a C64 Kernel be put on an EPROM in a Cartridge instead of opening up the computer and modding it? Been wonder if this can be done.

Kind of been thinking about this for awhile.
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I think it has to be possible and would be great because many kernal roms are soldered in place. CMD made the RamLink that just plugs in and gives all the Jiffy DOS Commands.

yes it can be done.... however its not trivial, you need some extra logic to handle the ROMH signal, which you need to get from inside of the c64 with a clip.

look at the "EXOS" cartridge as an example of a cart that does exactly (and only) that
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Strange how the same question pops up at about the same time in different forums.

I believe there was some talk about this in the EasyFlash 2, don't think they hooked anything extra up for that but we'll see. Some people were convinced that an eprom version of a PLA wouldn't be able to handle it.


EXOS:
http://rr.c64.org/wiki/ExOS

Sounds like it added som commands, just like the TFC3 does, and that didn't really replace the Kernal, did it?

It's easy to add a wedge into the Kernal using a cartridge to add commands. It just jumps to the cartridge ROM and checks for a special command character (usually @) then jumps back to the kernal. I see no reason why you couldn't jump to the cart with a whole new ROM then jump back to the END of the normal Kernal ROM when you're done, thereby bypassing it completely.
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My thoughts are JiffyDOS in a cartridge... that would be very handy - not having to physically install it.

doesn't the 781220 dead test cartridge use the same address as the kernel or override the kernal. I was just going to try it but i dont have jiffy dos in an 8k ROM to try.

So get it then:
http://cgi.ebay.co.uk/ws/eBayI...0270697626

Manual is not included but you can check it here:
http://worldofjani.com/wordpre...88-Jan.pdf

Looking at the explanation of HIRAM, LORAM, EXROM & GAME in the PRG, the only combination of the above that lets $E000..$FFFF come from an external ROM is the "UltiMAX" mode (GAME=0, EXROM=1), which would be useless for running any normal C64 program in.

But since normally the 'no cartridge' config has GAME=1, EXROM=1 maybe a cartridge should default to GAME=1, and assert GAME=0 only on an access to $E000..$FFFF

Pro logic dos speed up system replaced the internal kernel using a cartridge similar to the way CMD did.

Pro logic dos 1541 speed up system was made up of a cartridge with a ribon cable that went to an small board that was fitted inside the 1541.

I have one complete somewhere for a sx64, will find it and post pictures.

Here is the manual!
Please if someone has a better one please let me know.
http://www.cbm8bit.com/uploads...manual.zip

enjoy.
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What's wrong with the /ROMH signal already on the cartridge connector pin B?


So if it has been done before, why haven't we seen any JiffyDOS cartridge?

So all the equipment that worked as a replacement to kernal had some extra wire attached in the C64?

I would pay to have Jiffy DOS on cartridge. I hope someone makes it or gets it to work with EasyFlash.

JiffyDOS cartridge, perhaps something to put a bounty on.