Kerberos and FM YAM ?

[Pedro Echeverria]

Hello.  I am trying to use Kerberos with FM YAM in a mini X-pander. FM YAM uses IO2 ($DF00). Couldn't make it work as the cynthcart and FM YAM SFX editor will halt or not start all time. Anyone tried to use these carts successfully ?  Any mod hints I could try ? Thanks,

[Frank Buss]

I don't think this will work, because the Kerberos cartridge uses the $dfxx range as well. All 256 bytes, for one bank of the 128 kb RAM extension, which can be selected to be mapped to this range.

[John Anderson]

Hi - curious if the V2 Kerberos would / could operate at a different address? To avoid this, would be a cool bonus. 

[Frank Buss]

Good idea, I added it to the feature list. The $dfxx range is for the 256 bytes memory mapped region for the internal 128 kB SRAM of Kerberos. I think would be good to have the ability to disable it, and also to have a REU interface to the RAM, which programs already support.

But in general not a good idea to plugin multiple cartridges, because of the load on the data and address bus. But with modern cartridges like Kerberos and FM YAM it should be much lower load than with old cartridges, so might be no problem.