More Disk Image REfactoring

- The NZCOM disk image is now a fully configured, ready-to-run disk image.
- Working on ReadMe.txt files for each of the disk images.

Source/HBIOS/dbgmon.asm

@@ -472,13 +472,15 @@ PCRLF:
 	LD	C,16			; SET FOR 16 CHARS
 	POP	HL			; GET BACK START
 PCRLF0:
-	LD	A,(HL)			; GET BYTE
-	AND	060H			; SEE IF A 'DOT'
-	LD	A,(HL)			; O K. TO GET
-	JR	NZ,PDOT			;
-DOT:
-	LD	A,2EH			; LOAD A DOT
+	LD	A,(HL)			; GET BYTE TO PRINT
+	CP	$20			; CONTROL CHAR (UNPRINTABLE)?
+	JR	C,PDOT			; IF SO, PRINT A DOT
+	CP	$7F			; 127 OR MORE (UNPRINTABLE)?
+	JR	NC,PDOT			; IF SO, PRINT A DOT
+	JR	PCHAR			; PRINT ACTUAL CHAR
 PDOT:
+	LD	A,2EH			; OTHERWISE SUBSTITUTE A DOT
+PCHAR:
 	CALL	COUT			; PRINT IT
 	INC	HL			;
 	LD	A,D			;