implemented SAVE command

c64/basic/commands/cmd_save.s

@@ -8,7 +8,7 @@ cmd_save:
 	// Set default device and secondary address; channel is not important now
 
 	jsr select_device
-	ldy #$00                           // secondary address
+	ldy #$00
 	jsr JSETFLS
 
 	// Fetch the file name
@@ -16,10 +16,24 @@ cmd_save:
 	jsr fetch_filename
 	bcs_16 do_MISSING_FILENAME_error
 
+	// Try to fetch device
 
+	jsr fetch_device_secondary
 
+	// Setup the start and end addresses
 
+	lda #TXTTAB
 
-	// XXX - finish the implementation
+	// Setup the end address
+
+	ldx VARTAB+0
+	ldy VARTAB+1
+
+	// Perform saving
+
+	jsr JSAVE
+	jsr cmd_load_save_handle_result
+
+	// The end
 
 	jmp basic_main_loop