small clean up

femto.tal

@@ -92,12 +92,16 @@
 |0000
 
 ( terminal size information )
+( )
+( for now these are constant but eventually we could detect terminal resizes )
 @term [
     &cols $2        ( relative x coordinate of cursor, from 0 )
     &rows $2        ( relative y coordinate of cursor, from 1 )
 ]
 
 ( configuration settings used when editing )
+( )
+( these can be changed at any time without breaking anything else )
 @config [
     &tab-width $2    ( how many spaces to display tab chars )
     &insert-tabs $1  ( tab key inserts tabs when true )
@@ -105,14 +109,19 @@
 ]
 
 ( tracks information related to the buffer's view of data )
+( )
+( limit and line-count change when we modify the buffer. )
+( offset and line-offset change when we move the view port. )
 @buffer [
     &limit $2       ( last byte of actual data (not including \0) + 1 )
-    &offset $2      ( first byte of data visible in terminal )
     &line-count $2  ( total number of lines in file )
+    &offset $2      ( first byte of data visible in terminal )
     &line-offset $2 ( first line of text visible in terminal )
 ]
 
 ( relative cursor positions, e.g. 0 to cols-1 )
+( )
+( when these change we may need to move the view port as well )
 @cursor [
     &col $2         ( current column value 0-n (may exceed lenght of row) )
     &row $2         ( current relative row value, 0-(height-1) )
@@ -160,32 +169,22 @@
 
 ( startup )
 |0100
-    ;init-zero-page JSR2
-    ;startup JMP2
-
-( import uxn regex library )
-~regex.tal
-
-( intialize zero page variables           )
-(                                         )
-( everything not specified starts as zero )
-@init-zero-page ( -> )
+    ( init zero page )
     #0050 .term/cols STZ2
     #0018 .term/rows STZ2
-
     #0004 .config/tab-width STZ2
     #00   .config/insert-tabs STZ
     #3333 .config/color STZ2
-
     ;data .buffer/offset STZ2
-    JMP2r
 
-( code to run on startup )
-@startup
+    ( start reading the filename from argv )
     ;filename .tmp/pos STZ2
     ;read-filename .Console/vector DEO2
     BRK
 
+( import uxn regex library )
+~regex.tal
+
 ( ERROR HANDLING )
 
 ( using error! will print the given message before causing )