* Changed the way that Atmos programs are started.

- Put a BASIC-language stub at the beginning.
  - Removed the Autostart flag.

  Those changes make it easy to give command-line arguments to a program.

* Made the Atmos configure file accept a special symbol definition on ld65's command line.  We can use "__RAMEND__" to increase the amount of RAM that's available to programs.

libsrc/atmos/bashdr.s

@@ -0,0 +1,24 @@
+;
+; 2010-11-14, Ullrich von Bassewitz
+; 2014-09-06, Greg King
+;
+; This module supplies a small BASIC stub program that uses CALL
+; to jump to the machine-language code that follows it.
+;
+
+        ; The following symbol is used by the linker config. file
+        ; to force this module to be included into the output file.
+        .export __BASHDR__:abs = 1
+
+
+.segment        "BASHDR"
+
+        .addr   Next
+        .word   .version        ; Line number
+        .byte   $BF,'#'         ; CALL token, mark number as hexadecimal
+        .byte   <(Start >> 8      ) + '0' + (Start >> 8       > $09) * $07
+        .byte   <(Start >> 4 & $0F) + '0' + (Start >> 4 & $0F > $09) * $07
+        .byte   <(Start      & $0F) + '0' + (Start      & $0F > $09) * $07
+        .byte   $00             ; End of BASIC line
+Next:   .addr   $0000           ; BASIC program end marker
+Start: