Thanks, that helps me. Am Freitag, den 12.04.2019, 20:27 +0100 schrieb Alan Cox: > On Fri, 12 Apr 2019 20:52:31 +0200 > Klaus Brandl <kl...@kbrnet.de> wrote: > > > Hi, > > > > is there a way to get the _DATA section to the very end, and wipe > > it > > out on the z80 port? > > The order things appear is determined by what is in crt0.s. You can > thus > keep it at the end and rather than saving all the zeros to disk wipe > them > at startup. You can't get rid of it though - it's real used space. > > What you can get rid of is INITIALIZER by copying it into INITIALIZED > with a helper tool instead of doing that at runtime. I do that for > Fuzix. > The other thing I do for Fuzix is I put a lot of the early start up > code > into a section I call DISCARD and then re-use that memory for other > stuff > (working buffers etc) once I have the setup completed. > > The Fuzix tool is at > > https://github.com/EtchedPixels/FUZIX/blob/master/Library/tools/binma > n.c > > and processes the binary and map file from SDCC. It builds a Fuzix > header > as well which you clearly don't need but does show the basic > manipulations needed to bash an SDCC image into a more useful shape > when > running from RAM. > > Alan
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