On 9/22/2019 2:37 PM, Mia Magnusson wrote: > > Perhaps use extra addresses in the VIC-II address space? (Not sure if > anything bad happens if you touch those addresses though). Can you write to RAM under VIC-20 registers? Remember, the unit sits in the RAM sockets, so it only gets writes if RAM is written. > > Maybe you could put registers in the $FFxx range like on the C128, with > enable/disable in the regular I/O space. I think that would work, as writes bleed through to RAM with ROMs banked in, but reads would not work, so it'd be best to use this for the "quick, set my mapping, no need to read" use case. I'm not sure folks want to bank out ROMs all the time to read the MMU config, but could be wrong. Jim > -- Jim Brain brain_at_jbrain.com www.jbrain.comReceived on 2020-05-29 22:41:21
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