From: rose.joseph12@yahoo.com   
      
   On Thursday, August 10, 2017 at 3:48:55 PM UTC-4, chitselb wrote:   
   > If you needed 141 bytes of zero page on a C-64, what addresses would you   
   use?  BASIC is switched out, Kernal is still switched in, so anything BASIC   
   uses can be reallocated.  Having it all be contiguous so I can go in and out   
   of BASIC is important too.   
   >   
   > On a PET (4.0 ROM) I'm just using $00-$8C (everything below jiffy clock) and   
   there's a little ML routine ('aloha') to swap the half page in and out, but I   
   want to port PETTIL to the C=64   
      
   On a C64, the BASIC ROM uses ZP addresses $02-$8F, but you can use kernal ZP   
   locations you don't need in your program.  For example, $83-$8B and $AE-$B6   
   are used for tape and RS232 and $F7-$FF are for RS232 and free space.  Does   
   this help?   
      
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