diff --git a/emul/Makefile b/emul/Makefile
index 6f92073..17e6991 100644
--- a/emul/Makefile
+++ b/emul/Makefile
@@ -44,7 +44,7 @@ forth/stage1dbg: forth/stage.c $(OBJS) forth/forth0-bin.h
 forth/core.bin: $(FORTHSRC_PATHS) forth/stage1
 	cat $(FORTHSRC_PATHS) | ./forth/stage1 | tee $@ > /dev/null
 
-forth/forth1.bin: forth/stage1.asm forth/forth0.bin $(ZASMBIN)
+forth/forth1.bin: forth/stage1.asm forth/forth0.bin forth/core.bin $(ZASMBIN)
 	$(ZASMBIN) $(KERNEL) ../forth forth/z80c.bin forth/core.bin forth/stagec.asm < forth/stage1.asm | tee $@ > /dev/null
 
 forth/forth1-bin.h: forth/forth1.bin
diff --git a/emul/forth/z80c.bin b/emul/forth/z80c.bin
index 5bd02a5..227d7c5 100644
Binary files a/emul/forth/z80c.bin and b/emul/forth/z80c.bin differ
diff --git a/forth/forth.asm b/forth/forth.asm
index 865ec23..53c53be 100644
--- a/forth/forth.asm
+++ b/forth/forth.asm
@@ -166,30 +166,31 @@ INTERPRET:
 	.dw	FIND_
 	.dw	CSKIP
 	.dw	FBR
-	.db	32
+	.db	18
 	; It's a word, execute it
-	.dw	FLAGS_
-	.dw	FETCH
+	; For now, we only have one flag, let's take advantage of
+	; this to keep code simple.
 	.dw	ONE			; Bit 0 on
-	.dw	OR
 	.dw	FLAGS_
 	.dw	STORE
 	.dw	EXECUTE
-	.dw	FLAGS_
-	.dw	FETCH
-	.dw	NUMBER
-	.dw	0xfffe			; Bit 0 off
-	.dw	AND
+	.dw	ZERO			; Bit 0 off
 	.dw	FLAGS_
 	.dw	STORE
 	.dw	BBR
-	.db	39
+	.db	25
 	; FBR mark, try number
 	.dw	PARSEI
 	.dw	BBR
-	.db	44
+	.db	30
 	; infinite loop
 
+; Oops, I forgot to create a stable ABI before starting to rely on stability...
+; I'll fix this soon, but for now, I need to offset a recent simplification
+; I've made in INTERPRET above. If we don't, z80c.bin doesn't refer to proper
+; routine addresses...
+.fill 14
+
 ; *** Collapse OS lib copy ***
 ; In the process of Forth-ifying Collapse OS, apps will be slowly rewritten to
 ; Forth and the concept of ASM libs will become obsolete. To facilitate this
@@ -1559,27 +1560,9 @@ DIVMOD:
 	jp	next
 
 
-	.db	"AND"
-	.fill	4
-	.dw	$-DIVMOD
-	.db	0
-AND:
-	.dw	nativeWord
-	pop	hl
-	pop	de
-	call	chkPS
-	ld	a, e
-	and	l
-	ld	l, a
-	ld	a, d
-	and	h
-	ld	h, a
-	push	hl
-	jp	next
-
 	.db	"OR"
 	.fill	5
-	.dw	$-AND
+	.dw	$-DIVMOD
 	.db	0
 OR:
 	.dw	nativeWord
@@ -1764,4 +1747,3 @@ BBR:
 	.db	"_______"
 	.dw	$-BBR
 	.db	0
-LATEST:
diff --git a/forth/z80a.fs b/forth/z80a.fs
index 331e86d..46b58d6 100644
--- a/forth/z80a.fs
+++ b/forth/z80a.fs
@@ -45,6 +45,15 @@
 0x46 OP1r LDr(HL),
 0x70 OP1r LD(HL)r,
 
+( r -- )
+: OP1r0
+    CREATE C,
+    DOES>
+    C@              ( r op )
+    OR A,
+;
+0xa0 OP1r0 ANDr,
+
 ( qq -- also works for ss )
 : OP1qq
     CREATE C,
@@ -138,3 +147,6 @@
 
 : ;CODE JPNEXT, ;
 
+
+( Routines )
+: chkPS, ROUTINE P [LITN] CALLnn, ;
diff --git a/forth/z80c.fs b/forth/z80c.fs
index 1e8c078..5770e07 100644
--- a/forth/z80c.fs
+++ b/forth/z80c.fs
@@ -71,3 +71,15 @@ CODE 2SWAP
     BC PUSHqq,      ( B )
 ;CODE
 
+CODE AND
+    HL POPqq,
+    DE POPqq,
+    chkPS,
+    A E LDrr,
+    L ANDr,
+    L A LDrr,
+    A D LDrr,
+    H ANDr,
+    H A LDrr,
+    HL PUSHqq,
+;CODE