diff --git a/c64/kernal/,aliases.s b/c64/kernal/,aliases.s
new file mode 100644
index 00000000..ad4dc31d
--- /dev/null
+++ b/c64/kernal/,aliases.s
@@ -0,0 +1,51 @@
+;	Names of ZP and low memory locations
+;	(Only those of relevance for the KERNAL)
+;	(And only those for now that we feel the need to implement initially)
+;	(https://www.c64-wiki.com/wiki/Zeropage)
+
+	.alias TXTTAB $2B
+	.alias MEMSIZ $37
+	.alias IOSTATUS $90
+	; Keys down clears bits. STOP=bit 7, C= bit 6, SPACE bit 4, CTRL bit 2
+	.alias BUCKYSTATUS $91
+	.alias load_or_verify_flag $93
+	.alias current_file_num $98
+	.alias input_device_number $99
+	; bit 6 = error messages, bit 7 = control messages
+	.alias kernal_message_control_flags $9d
+	.alias jiffy_clock_24bits $a0
+	.alias cassette_buffer_bytes_used $A6
+	.alias load_save_verify_end_address $AE
+	.alias cassette_buffer_ptr $B2
+	.alias current_filename_length $B7
+	.alias current_logical_filenum $B8
+	.alias current_secondary_address $B9
+	.alias current_device_number $BA
+	.alias current_filename_ptr $BB
+	.alias load_save_start_ptr $C1
+	.alias load_save_end_ptr $C3
+	.alias last_key_matrix_position $C5
+	.alias keys_in_key_buffer $C6
+	.alias reverse_video_flag $C7
+	.alias current_key_index_entry $CB
+	.alias cursor_blink_disable $CC
+	.alias cursor_blink_countdown $CD
+	.alias cursor_saved_character $CE
+	.alias cursor_is_visible $CF
+	.alias input_source $D0
+	.alias current_screen_line_ptr $D1
+	.alias current_screen_line_logical_column $D3
+	.alias quote_mode_flag $D4
+	.alias max_logical_line_length $D5
+	.alias cursor_physical_screen_line $D6
+	.alias last_printed_character_ascii $D7
+	.alias insert_mode $D8
+	; Bits 0 -3 = bits 8-11 of screen line address
+	; Bit 7 = line spans multiple physical lines
+	.alias screen_line_link_table $D9
+	.alias current_screen_line_colour_ptr $F3
+	.alias keyboard_decoding_table_ptr $F5
+	.alias rs232_rx_buffer_ptr $F7
+	.alias rs232_tx_buffer_ptr $F9
+
+	
diff --git a/src/preprocess.c b/src/preprocess.c
index 39ba294c..48661557 100644
--- a/src/preprocess.c
+++ b/src/preprocess.c
@@ -141,11 +141,13 @@ int main(int argc,char **argv)
     fprintf(out,"\t.org 0\n");
     for(int i=0;i<source_count;i++) {
       fprintf(out,"; Source file '%s'\n",source_files[i].file);
-      fprintf(out,"__routine_start_%s:\n",source_files[i].file);
+      if (source_files[i].file[0]!=',')
+	fprintf(out,"__routine_start_%s:\n",source_files[i].file);
       char path[8192];
       snprintf(path,8192,"%s/%s",directory,source_files[i].file);
       if (dump_file(out,path)) DO_ERROR("Could not read source file");
-      fprintf(out,"__routine_end_%s:\n",source_files[i].file);
+      if (source_files[i].file[0]!=',')
+	fprintf(out,"__routine_end_%s:\n",source_files[i].file);
     }
     fclose(out);
     char cmd[8192];