>The "global page" (chapter 8, page 5 of beneath prodos) >is mentioned to have a "bitmap" of free memory available. >(also mentioned chapter 5, page 6) I don't see it listed >in chapter 8. I see, it is only bitmap for lower 48k chapter 8 page 6 BF58 - BF6F BITMAP BITMAP of low 48k of memory only 23 bytes are needed. Prodos doesn't keep track of LC area because it resides there. $0000 - $BFFF = lower 48k $C000 - $CFFF = hardware I/O $D000 - $FFFF = Prodos kernel lower 48k: $0800 - $95FF = free space $9600 - $BDFF = Basic interpreter $BE00 - $BEFF = Basic Interpreter global page $BF00 - $BFFF = system global page Rich