BLOAD/BVERIFY can now parse parameters and read data

c64/basic/basic_commands_CC/helper_bload_fetch_filename.s

@@ -0,0 +1,26 @@
+// #LAYOUT# STD *       #TAKE
+// #LAYOUT# *   BASIC_0 #TAKE
+// #LAYOUT# *   *       #IGNORE
+
+//
+// Fetches file name for BLOAD/BVERIFY/MERGE, reports error if not found
+//
+
+
+helper_bload_fetch_filename:
+
+	// Fetch the file name
+
+	jsr helper_load_fetch_filename
+	bcc !+
+
+	// No filename supplied - this should only be allowed for tape (device number below 8)
+
+	lda FA
+	and #%11111000
+	bne_16 do_MISSING_FILENAME_error
+
+	lda #$00
+	sta FNLEN
+!:
+	rts