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forth: remove dummy.fs

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All "stop pings" are now explicitly made at appropriate places. This
fixes a problem I've introduced in the last commit where RAM+ was
unexpectedly part of a stable ABI because of "HERE" usage in dummy.fs.

This system will, anyways, soon change because boot.bin and z80c.bin
will be built during the same process (but there's a bit of retooling
to do before I get there).
This commit is contained in:
Virgil Dupras 2020-04-02 11:29:23 -04:00
parent 68a7be3707
commit 2481ed4b66
5 changed files with 14 additions and 16 deletions
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6
emul/Makefile
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@ -7,7 +7,7 @@ AVRABIN = zasm/avra
SHELLAPPS = zasm ed
SHELLTGTS = ${SHELLAPPS:%=cfsin/%}
# Those Forth source files are in a particular order
FORTHSRCS = core.fs str.fs parse.fs readln.fs fmt.fs z80a.fs dummy.fs
FORTHSRCS = core.fs str.fs parse.fs readln.fs fmt.fs z80a.fs
FORTHSRC_PATHS = ${FORTHSRCS:%=../forth/%}
CFSIN_CONTENTS = $(SHELLTGTS) cfsin/user.h
OBJS = emul.o libz80/libz80.o
@ -42,7 +42,7 @@ forth/stage1dbg: forth/stage.c $(OBJS) forth/forth0-bin.h
$(CC) -DDEBUG -DBOOT forth/stage.c $(OBJS) -o $@
forth/core.bin: $(FORTHSRC_PATHS) forth/stage1
cat $(FORTHSRC_PATHS) | ./forth/stage1 | tee $@ > /dev/null
cat $(FORTHSRC_PATHS) ./forth/stop.fs | ./forth/stage1 | tee $@ > /dev/null
forth/forth1.bin: forth/forth0.bin forth/core.bin
cat forth/forth0.bin forth/core.bin > $@
@ -104,7 +104,7 @@ updatebootstrap: $(ZASMBIN)
.PHONY: fbootstrap
fbootstrap: forth/stage2
cat ./forth/conf.fs ../forth/boot.fs | ./forth/stage2 > forth/boot.bin
cat ../forth/dummy.fs ../forth/z80c.fs forth/emul.fs ../forth/icore.fs ../forth/dummy.fs | ./forth/stage2 | tee forth/z80c.bin > /dev/null
cat ../forth/z80c.fs forth/emul.fs ../forth/icore.fs | ./forth/stage2 | tee forth/z80c.bin > /dev/null
.PHONY: clean
clean:

2
emul/forth/stop.fs Normal file
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@ -0,0 +1,2 @@
(entry) _
H@ 256 /MOD 2 PC! 2 PC!

13
forth/dummy.fs
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@ -1,13 +0,0 @@
( When building a compiled dict, always include this unit at
the end of it so that Forth knows how to hook LATEST into
it. We don't use the word "(entry)" to avoid messing up
with icore setup. )
CREATE _
H@ 2 - HERE !
( After each dummy word like this, we poke IO port 2 with our
current HERE value. The staging executable needs it to know
what to dump. )
H@ 256 / 2 PC!
H@ 2 PC!

5
forth/icore.fs
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@ -252,3 +252,8 @@
':' ' X 4 - C!
';' ' Y 4 - C!
( Add dummy entry. we use CREATE because (entry) is, at this
point, broken. Adjust H@ durint port 2 ping. )
CREATE _
H@ 2 - 256 /MOD 2 PC! 2 PC!

4
forth/z80c.fs
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@ -20,6 +20,10 @@
expected to be defined in platform-specific code.
)
( dummy entry for dict hook )
(entry) _
H@ 256 /MOD 2 PC! 2 PC!
( a b c -- b c a )
CODE ROT
HL POPqq, ( C )