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authorDimitri Sokolyuk <demon@dim13.org>2017-08-19 12:15:28 +0200
committerDimitri Sokolyuk <demon@dim13.org>2017-08-19 12:15:28 +0200
commit67d25d837ac55f28a366c0a3b262e439a6e75fc3 (patch)
treedf7715c7724c5935ab87c807f3b8b4ef529315e3 /amforth-6.5/avr8/words/header.asm
parente0d6784e89dba33226c0edb815bb974486fa7c48 (diff)
Add AmForth
Diffstat (limited to 'amforth-6.5/avr8/words/header.asm')
-rw-r--r--amforth-6.5/avr8/words/header.asm36
1 files changed, 36 insertions, 0 deletions
diff --git a/amforth-6.5/avr8/words/header.asm b/amforth-6.5/avr8/words/header.asm
new file mode 100644
index 0000000..4a1e6e9
--- /dev/null
+++ b/amforth-6.5/avr8/words/header.asm
@@ -0,0 +1,36 @@
+; ( addr len wid -- nfa )
+; Compiler
+; creates the vocabulary header without XT and data field (PF) in the wordlist wid
+VE_HEADER:
+ .dw $ff06
+ .db "header"
+ .dw VE_HEAD
+ .set VE_HEAD = VE_HEADER
+XT_HEADER:
+ .dw DO_COLON
+PFA_HEADER:
+ .dw XT_DP ; the new Name Field
+ .dw XT_TO_R
+ .dw XT_TO_R ; ( R: NFA WID )
+ .dw XT_DUP
+ .dw XT_GREATERZERO
+ .dw XT_DOCONDBRANCH
+ .dw PFA_HEADER1
+ .dw XT_DUP
+ .dw XT_DOLITERAL
+ .dw $ff00 ; all flags are off (e.g. immediate)
+ .dw XT_OR
+ .dw XT_DOSCOMMA
+ ; make the link to the previous entry in this wordlist
+ .dw XT_R_FROM
+ .dw XT_FETCHE
+ .dw XT_COMMA
+ .dw XT_R_FROM
+ .dw XT_EXIT
+
+PFA_HEADER1:
+ ; -16: attempt to use zero length string as a name
+ .dw XT_DOLITERAL
+ .dw -16
+ .dw XT_THROW
+