TZUTC: -0600   
   MSGID: 1741.fido_cbm@1:124/5016 24396825   
   REPLY:  98dff306   
   PID: Synchronet 3.18c-Linux  Nov 25 2020 GCC 7.5.0   
   TID: SBBSecho 3.11-Linux r3.179 Dec 10 2020 GCC 9.3.0   
   CHRS: ASCII 1   
   -=> Lawrence Woodman wrote to All <=-   
      
    LW> Hello,   
      
    LW> Does anyone know why the colour map moves between $9400 and $9600 on   
    LW> the Vic? Is there a reason it couldn't stay at a single location such   
    LW> as $9400?   
      
    LW> I've wondered about this for a while and there is probably an obvious   
    LW> reason that I'm missing but I would love to know. My interest in this   
    LW> was renewed recently when I was creating a video (links below) which   
    LW> shows the colour map being used as a location to store data and now it   
    LW> seems I really should find out.  I've posted about this on vcfed.org   
    LW> but there's been no answer yet so am hoping someone here will know.   
      
    LW> Run Code and Store Data in Display Memory on the VIC-20   
    LW>   Video: https://www.youtube.com/watch?v=EkfBijC8MSU   
    LW>   Article:   
    LW> https://techtinkering.com/articles/code-and-data-in-display-memory-on-th   
    LW> e-vic-20/   
      
      
    LW> Best wishes   
      
   I think it had to do with how the VIC chip addressed memory internally.  It was   
   only able to "see" a portion of the Vic 20 memory map, and if you moved the   
   screen memory, then the color RAM would also have to move so it would map   
   correctly.   
      
   http://tinyvga.com/6561   
      
   ... Dennis Katsonis   
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