monitor command 'F' adaptation, not tested yet

src/mon_m65/mon_helper_get_param_range.s

@@ -0,0 +1,42 @@
+
+; Based on BSM (Bit Shifter's Monitor)
+
+
+Get_Param_Range:
+
+; read two (address) parameters
+
+; Long_CT       - difference (2nd minus 1st parameter)
+; Long_PC       - 1st parameter
+; Src_Addr_Mode - 1st parameter addressing mode
+; Long_DA       - 2nd parameter
+; Dst_Addr_Mode - 2nd parameter addressing mode
+
+; carry on exit - 2nd parameter lower than 1st one
+
+	jsr  @get_helper
+	sta  Src_Addr_Mode
+	jsr  LAC_To_LPC             ; Long_PC - 1st address
+
+	jsr  @get_helper
+	sta  Dst_Addr_Mode
+	jsr  LAC_To_LDA             ; Long_PC - 2nd address
+
+    jsr  LAC_Minus_LPC          ; Long_CT = range
+    bcc  @error
+    clc
+    rts
+
+@error:
+
+	sec
+	rts
+
+@get_helper:
+
+	lda  #$00
+	sta  Addr_Mode
+	jsr  Get_Addr_To_LAC
+	beq  @error
+	lda  Addr_Mode
+	rts