Renamed INITBSS to INIT and INIT to ONCE.

The way we want to use the INITBSS segment - and especially the fact that it won't have the type bss on all ROM based targets - means that the name INITBSS is misleading. After all INIT is the best name from my perspective as it serves several purposes and therefore needs a rather generic name.

Unfortunately this means that the current INIT segment needs to be renamed too. Looking for a short (ideally 4 letter) name I came up with ONCE as it contains all code (and data) accessed only once during initialization.

libsrc/atmos/capslock.s

@@ -17,7 +17,7 @@
 ;--------------------------------------------------------------------------
 ; Put this constructor into a segment that can be re-used by programs.
 ;
-.segment        "INIT"
+.segment        "ONCE"
 
 ; Turn the capitals lock off.
 

libsrc/atmos/cgetc.s

@@ -55,10 +55,10 @@
 .endproc
 
 ; ------------------------------------------------------------------------
-; Switch the cursor off. Code goes into the INIT segment
+; Switch the cursor off. Code goes into the ONCE segment
 ; which may be reused after it is run.
 
-.segment        "INIT"
+.segment        "ONCE"
 
 initcgetc:
         lsr     STATUS

libsrc/atmos/irq.s

@@ -9,7 +9,7 @@
 
 ; ------------------------------------------------------------------------
 
-.segment        "INIT"
+.segment        "ONCE"
 
 initirq:
         lda     IRQVec

libsrc/atmos/mainargs.s

@@ -17,10 +17,10 @@ REM      = $9d                  ; BASIC token-code
 
 
 ;---------------------------------------------------------------------------
-; Get possible command-line arguments. Goes into the special INIT segment,
+; Get possible command-line arguments. Goes into the special ONCE segment,
 ; which may be reused after the startup code is run
 
-.segment        "INIT"
+.segment        "ONCE"
 
 .proc   initmainargs
 

libsrc/atmos/read.s

@@ -69,7 +69,7 @@ L9:     lda     ptr3
 ;--------------------------------------------------------------------------
 ; initstdin:  Reset the stdin console.
 
-.segment        "INIT"
+.segment        "ONCE"
 
 initstdin:
         ldx     #<-1