From: groepaz (groepaz_at_gmx.net)
Date: 2002-05-22 19:17:57
Hello Greg, Wednesday, May 22, 2002, 6:48:43 PM, you wrote: GK> That solution will be easier to do, after ld65's configure-scripts are GK> "expanded." Instead of providing the minimum zero-page space that is needed GK> by the compiler, they should "allocate" the maximum contiguous space GK> that is not used outside of the program. For example, "c64.cfg" should say, GK> "ZP: start = $02, size = $8E, type = rw, define = yes;" thats a very nice idea indeed for the sake of taking into consideration the special role the zeropage plays in 6510 based system i'd advance that idea a bit though.... that is, make some mechanism that makes it possible to "lock" every single adress by itself (that feature actually makes sence for ordinary ram aswell!, that could aid a LOT with some advanced stuff like FPP routines and alike which scatter all their data over the memory) ... ie, you may want to use some music-routine that uses zeropage-locations $10, $20,$30, and $a0-$ae (stupid example yes ;=)) ... "ZP: start = $02, size = $8E, lock=$10,$20,$30,$a0-$ae, type = rw, define = yes;" in in essence what i want to say is, the allocated memory block shouldnt need to be one continues chunk (should be trivial to make the linker sort the symbols by size and let it choose the best place for them - ofcoz the largest continous block will limit your max. size of symbols and to many locked locations would make a section hardly useable, thats however up to the user then ;=)) GK> I agree that "it won't fit" is the only reasonable reaction when ld65 runs out GK> of room -- in any memory-area. The linker cannot know our goals; GK> so, it would not know which variables GK> are merely nice-to-have-sitting-down-there-if-there-were-space. It is our job GK> to adjust the code, in order "to shoehorn" it into the targets. however, the linker could still place symbols that wont fit in zeropage in .bss automagically (should issue a warning though) .... OR it may be better to define a "common" section in the linkerscript simelar to whats done in gcc (all symbols that "dont fit" otherwhise go there) -- Best regards, groepaz mailto:groepaz_at_gmx.net ---------------------------------------------------------------------- To unsubscribe from the list send mail to majordomo_at_musoftware.de with the string "unsubscribe cc65" in the body(!) of the mail.
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