stub behaviour is now configurable

CONFIG.md

@@ -93,3 +93,9 @@ Feature needs about 330 bytes in BASIC segment.
 On the most widespread CPUs the D flag is not cleared upon entering interrupts. Since the original Kernal does not clear it either, it's not safe to use BCD processor mode without disabling the interrupts first. This option makes sure the D flag is disabled at the start of the interrupt - this allows some optimizations in the code.
 
 Feature needs 2 bytes in KERNAL segmment (for CPUs needing the patch), but at the same time allows optimizations allowing to gain some more bytes. If unsure - enable.
+
+### `CONFIG_STUBS_BRK`
+
+Option just for debugging purposes - replaces `RTS` stubbed routines implementation with one causing a break.
+
+If unsure - disable.

c64/,,config_generic.s

@@ -22,3 +22,5 @@
 
 #define CONFIG_DOS_WEDGE
 #define CONFIG_BCD_SAFE_INTERRUPTS
+
+// #define CONFIG_STUBS_BRK

c64/,,config_mega65.s

@@ -22,3 +22,5 @@
 
 #define CONFIG_DOS_WEDGE
 #define CONFIG_BCD_SAFE_INTERRUPTS
+
+// #define CONFIG_STUBS_BRK

c64/,,config_ultimate64.s

@@ -22,3 +22,5 @@
 
 #define CONFIG_DOS_WEDGE
 #define CONFIG_BCD_SAFE_INTERRUPTS
+
+// #define CONFIG_STUBS_BRK

c64/aliases/,aliases_config.s

@@ -58,4 +58,26 @@
 
 #if CONFIG_BCD_SAFE_INTERRUPTS
 #define HAS_BCD_SAFE_INTERRUPTS
-#endif
+#endif
+
+	// Stub configuration
+
+.macro STUB_IMPLEMENTATION_RTS() {
+	rts
+}
+
+.macro STUB_IMPLEMENTATION_BRK() {
+	.break
+	brk
+	brk
+	jmp *-2
+}
+
+.macro STUB_IMPLEMENTATION()
+{
+#if CONFIG_STUBS_BRK
+	STUB_IMPLEMENTATION_BRK()
+#else
+	STUB_IMPLEMENTATION_RTS()
+#endif
+}

c64/basic/a483.main.s

@@ -10,4 +10,4 @@
 
 
 MAIN:
-	rts // XXX implement this
+	STUB_IMPLEMENTATION()

c64/basic/a57c.chrnch.s

@@ -10,4 +10,4 @@
 
 
 CHRNCH:
-	rts // XXX implement this
+	STUB_IMPLEMENTATION()

c64/basic/a68e.runc.s

@@ -2,4 +2,4 @@
 // XXX provide documentation and implementation
 
 RUNC:
-    rts
+    STUB_IMPLEMENTATION()

c64/basic/a71a.qplop.s

@@ -10,4 +10,4 @@
 
 
 QPLOP:
-	rts // XXX implement this
+	STUB_IMPLEMENTATION()

c64/basic/a7ae.newstt.s

@@ -2,4 +2,4 @@
 // XXX provide documentation and implementation
 
 NEWSTT:
-    rts
+	STUB_IMPLEMENTATION()

c64/basic/a7e4.gone.s

@@ -10,4 +10,4 @@
 
 
 GONE:
-	rts // XXX implement this
+	STUB_IMPLEMENTATION()

c64/basic/ae86.eval.s

@@ -10,4 +10,4 @@
 
 
 EVAL:
-	rts // XXX implement this
+	STUB_IMPLEMENTATION()

c64/basic/bdcd.linprt.s

@@ -7,4 +7,4 @@
 
 
 LINPRT:
-	rts // XXX implement this
+	STUB_IMPLEMENTATION()

c64/basic/e38b.error.s

@@ -10,4 +10,4 @@
 
 
 ERROR:
-	rts // XXX implement this
+	STUB_IMPLEMENTATION()

c64/basic/e3bf.init.s

@@ -2,4 +2,4 @@
 // XXX provide documentation and implementation
 
 INIT:
-    rts
+    STUB_IMPLEMENTATION()

c64/basic/e422.initmsg.s

@@ -2,4 +2,4 @@
 // XXX provide documentation and implementation
 
 INITMSG:
-    rts
+    STUB_IMPLEMENTATION()

c64/basic/e453.rvect.s

@@ -2,4 +2,4 @@
 // XXX provide documentation and implementation
 
 RVECT:
-    rts
+    STUB_IMPLEMENTATION()

c64/kernal/f5ed.save.s

@@ -10,4 +10,4 @@
 //
 
 SAVE:
-	rts
+	STUB_IMPLEMENTATION()