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diff --git a/atarist/explain b/atarist/explain
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-Here is a brief explaination of the diffs in perl.diffs. If anything
-is unclear please just ask:
-
-General:
-  Many of the  #ifdef MSDOS where required for the atari too. In order
-to avoid cluttering up the source, upfront in perl.h we #define
-MSDOS_OR_ATARI if either defined(MSDOS) or defined(atarist).
-
- Some of the diffs that i felt were universally applicable are not protected
-with #ifdef's. In the explainations below i has indicated all such
-changes.
-
-perl.h:
-  -- define MSDOS_OR_ATARI if appro.
-  -- typedef size_t - assume its there in <stddef.h> if STANDARD_C otherwise
-     typedef it to unsigned int (i would have ideally liked unsigned long,
-     but we get into trouble with half-assed headers from sun etc)
-(this change not protected with a #ifdef since hopefully its universally appli)
-
-  -- make the type of STRLEN size_t for all systems
-(this change not protected with a #ifdef since hopefully its universally appli)
-
-  -- more #ifdef MSDOS -> #ifdef MSDOS_OR_ATARI changes.
-
-arg.h:
-  -- in the atari headers we already have O_PIPE. Change all instances of
-     O_PIPE to PERL_O_PIPE. All such changes protected with #ifdef atarist.
-
-handy.h:
-  -- make MEM_SIZE size_t like STRLEN.
-(this change not protected with a #ifdef since hopefully its universally appli)
-
-doarg.c:
-  -- accomodate the large number of args needed for the atari syscall().
-  -- do the 9 thru 14 arg versions of syscall for the atarist.
-
-doio.c:
-  -- mode[] needed to be  initialized.
-(this change not protected with a #ifdef since hopefully its universally appli)
-
-  -- you may find this strange, we do not define STDSTDIO, because even
-     though we have the "standard" field in FILE, the semantics are
-     different. However, some contexts will work correctly, and there
-     you will see #if defined(STDSTDIO) || defined(atarist)
-
-  -- more #ifdef MSDOS -> #ifdef MSDOS_OR_ATARI changes.
-
-eval.c:
-  -- more #ifdef MSDOS -> #ifdef MSDOS_OR_ATARI changes.
-
-malloc.c::
-  -- instead of bashfully using ints to hold sizes use MEM_SIZE.
-     adjust some casts and printf format specifiers due to this.
-     (atarigcc can run in two modes, with 16 or 32 bit ints, so...)
-(this change not protected with a #ifdef since hopefully its universally appli)
-
-  -- atarist changes sometimes ||'ed with I286 as appro.
-
-perl.c:
-  -- more #ifdef MSDOS -> #ifdef MSDOS_OR_ATARI changes.
-
-regcomp.c:
-  -- like O_PIPE the atarist headers already has META defined. Change all
-     instances of META to PERL_META. All such changes protected with
-     #ifdef atarist.
-
-str.c:
-  -- more #ifdef MSDOS -> #ifdef MSDOS_OR_ATARI changes.
-
-token.c::
-  -- META -> PERL_META renaming for atari
-
-util.c::
-  -- more adjustments for memory sizes being MEM_SIZE instead of int.
-  -- more #ifdef MSDOS -> #ifdef MSDOS_OR_ATARI changes.
-
-++jrb  bammi@cadence.com