From: Leo C <erbl259-lmu@yahoo.de>
Date: Sun, 16 Feb 2020 22:24:33 +0000 (+0100)
Subject: Some comments
X-Git-Url: http://cloudbase.mooo.com/gitweb/ddt180.git/commitdiff_plain/6239d386384d5b2c49173b7454978756a72f17a4

Some comments
---

diff --git a/ddt180.z80 b/ddt180.z80
index 3184500..c1a394b 100644
--- a/ddt180.z80
+++ b/ddt180.z80
@@ -1901,18 +1901,18 @@ bp_tst_@pc:
 	call	bpl_init
 
 	ld a,(ix+000h)
-	and 003h
-	jr z,bp_tst_e
+	and 003h		;User bp (temporary or permanent)?
+	jr z,bp_tst_e		;No, check next
 	ld e,(ix+002h)
 	ld d,(ix+003h)
 	ld hl,(reg.pc)
-	call cp_hl_de
-	ret z
+	call cp_hl_de		;Current PC is on a User bp
+	ret z			;Return zero
 bp_tst_e:
 	call	bpl_next
 	sub a
-	inc a
-	ret
+	inc a			;Not on a user bp
+	ret			;Return not zero
 
 bp_trace_enter:
 	call bp_get_freeslot
@@ -1954,7 +1954,6 @@ bp_set_to_mem:
 	inc hl
 	ld (hl),d
 l0a1dh:
-
 	call	bpl_next
 	ret
 
@@ -1998,12 +1997,12 @@ l0a41h:
 bp_clr_condition:
 	ld a,(ix+000h)
 	and 003h
-	ret nz
+	ret nz				; No (user) bp set
 	ld e,(ix+006h)
 	ld d,(ix+007h)
 	ld a,d
 	or e
-	ret z
+	ret z				; No conditional expression
 	push bc
 	ld h,d
 	ld l,e
@@ -5772,6 +5771,7 @@ l208bh:
 	scf
 	ret
 
+;jr, djnz
 l2093h:
 	ld c,(iy+001h)
 	ld a,c
@@ -5815,6 +5815,8 @@ l20b8h:
 	jr z,l20dch
 	and a
 	ret
+
+;ret cc
 l20c5h:
 	ld a,(iy+000h)
 	ld (l20d7h),a
@@ -5832,6 +5834,7 @@ l20d7h:
 	inc hl
 	jp (hl)
 
+;ret
 l20dch:
 	ld a,(b_21e2_start)
 	and a
@@ -5849,10 +5852,12 @@ l20edh:
 	ld d,(hl)
 	ex de,hl
 	call bp_trace_enter
+;rst 8
 l2115h:
 	and a
 	ret
 
+;rst n
 l20f9h:
 	ld a,(l0003h)
 	cp (iy+000h)