another small error handling optimization

c64/basic/engine/do_error.s

@@ -33,6 +33,19 @@
 // message that the $2C method would result in.
 
 
+// XXX consider reworking the two errors below to reuse '$E6' mechanism
+
+
+do_NOT_IMPLEMENTED_error:
+
+	ldx #36
+	bpl do_basic_error                 // branch always
+
+do_MEMORY_CORRUPT_error:
+
+	ldx #35
+	bpl do_basic_error                 // branch always
+
 do_kernal_error:                       // .A = KERNAL error code, also almost matches BASIC error codes
 	
 	// Convert to BASIC error code
@@ -44,25 +57,6 @@ do_kernal_error:                       // .A = KERNAL error code, also almost ma
 	// FALLTROUGN
 
 do_BREAK_error:
-
-	ldx #B_ERR_BREAK
-	bpl do_basic_error                 // branch always
-
-do_NOT_IMPLEMENTED_error:
-	.byte $E6
-do_MEMORY_CORRUPT_error:
-	.byte $E6
-	// the message "BYTES FREE"
-	.byte $E6
-	// the word ERROR
-	.byte $E6
-	// The word "SAVING"
-	.byte $E6
-	// The word "VERIFYING"
-	.byte $E6
-	// The word "LOADING"
-	.byte $E6
-	// The word "READY."
 	.byte $E6
 do_LOAD_error:
 	.byte $E6
@@ -148,13 +142,12 @@ do_TO_MANY_FILES_error:
 do_basic_error:                        // error code in .X
 
 	// "?"
-	txa
+	phx_trash_a
 	pha
 	jsr print_return
 	lda #$3F
 	jsr JCHROUT
-	pla
+	plx_trash_a
-	tax
 
 	// Error message text + " ERROR"
 

c64/basic/ready_message.s

@@ -5,5 +5,5 @@
 
 ready_message:
 
-	ldx #29
+	ldx #30
 	jmp print_packed_message

tools/compress_text.c

@@ -157,9 +157,9 @@ char *error_list[]={
   "UNDEF\'D FUNCTION",     // https://www.saatchiart.com/print/Painting-Undef-d-Function-3495/16167/3829193/view
   "VERIFY",                // https://forums.openvpn.net/viewtopic.php?t=22040
   "LOAD",                  // https://www.discogs.com/Gimmik-Load-Error/release/482462
+  "BREAK", // #29
   // Non-error messages
-  "READY.\r", // #29       // https://www.ibm.com/support/knowledgecenter/zosbasics/com.ibm.zos.zconcepts/zconc_whatistsonative.htm https://github.com/stefanhaustein/expressionparser
+  "READY.\r", // #30       // https://www.ibm.com/support/knowledgecenter/zosbasics/com.ibm.zos.zconcepts/zconc_whatistsonative.htm https://github.com/stefanhaustein/expressionparser
-  "BREAK", // #30
   " IN ", // #31
   "BRK AT $", // #32
   " ERROR", // #33            // Simply the word error that is attached to the other parts of messages https://fjkraan.home.xs4all.nl/comp/apple2faq/app2asoftfaq.html