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|    comp.sys.cbm    |    Discussion about Commodore micros    |    53,866 messages    |
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|    Message 51,885 of 53,866    |
|    Ross Ridge to as@sci.fi    |
|    Re: C64/1541 copy: have disk, need file!    |
|    07 Mar 17 17:06:35    |
   
   From: rridge@csclub.uwaterloo.ca   
      
   Anssi Saari wrote:   
   >Yes, presumably. But it's just a little bit hard to do I/O if you switch   
   >I/O out of your memory space so that's not the thing to do, exactly.   
      
   You can either swap the I/O space in and out as each byte is read or   
   keep it mapped and have 4K less RAM to store the program.   
      
   >One could use RAM to RAM copy to fill the RAM under I/O. But I wonder,   
   >Pekka's routine was just 40 bytes using ROM routines so 6.5K (or 5.5K   
   >since the program was actually copy 58.5k) RAM seems excessive.   
      
   I'm assuming it would be using some sort of "fastloader" code to improve   
   speed so it wouldn't use the kernal ROM.   
      
    Ross Ridge   
      
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