Complete redesign of the CBM610 support.

Use wrappers to call the kernal in bank 15 instead of implementing kernal
functionality within the cc65 libs (eats performance but is much smaller and
simpler).
Improved startup/shutdown code allows a return to the system bank without
calling the BASIC cold start vector.


git-svn-id: svn://svn.cc65.org/cc65/trunk@2793 b7a2c559-68d2-44c3-8de9-860c34a00d81

libsrc/cbm610/extzp.s

@@ -0,0 +1,44 @@
+;
+; Ullrich von Bassewitz, 2003-12-20
+;
+; Additional zero page locations for the CBM610.
+; NOTE: This file is actually linked to an application with its full contents,
+; so the program comes up with the values given in this file.
+;
+
+; ------------------------------------------------------------------------
+
+        .include        "extzp.inc"
+
+.segment        "EXTZP" : zeropage
+
+; The following values get initialized from a table in the startup code.
+; While this sounds crazy, it has reasons that have to do with modules (and
+; we have the space anyway). So when changing anything, be sure to adjust the
+; initializer table
+sysp1:          .word   $0000
+sysp3:          .word   $0000
+crtc:  	       	.word  	$0000
+sid:   	       	.word  	$0000
+ipccia:	       	.word  	$0000
+cia:   	       	.word  	$0000
+acia:  	       	.word  	$0000
+tpi1:  	       	.word  	$0000
+tpi2:  	       	.word  	$0000
+ktab1: 	       	.word  	$0000
+ktab2: 	       	.word  	$0000
+ktab3: 	       	.word  	$0000
+ktab4: 	       	.word  	$0000
+
+sysp0:          .word   $0000
+time:	      	.dword 	$0000
+segsave:        .byte   0
+scanbuf:        .byte   0
+ktmp:           .byte   0
+CURS_X:         .byte   0
+CURS_Y:         .byte   0
+CharPtr:        .word   0
+
+
+
+