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libsrc/common/_heap.s

@@ -0,0 +1,45 @@
+;
+; Ullrich von Bassewitz, 03.06.1998
+;
+; Heap variables and initialization.
+;
+
+     	.export		__horg, __hptr, __hend, __hfirst, __hlast
+	.export		__hinit
+       	.import	       	__BSS_RUN__, __BSS_SIZE__, __stksize
+	.importzp	sp
+
+.data
+
+__horg:
+       	.word  	__BSS_RUN__+__BSS_SIZE__	; Linker calculates this symbol
+__hptr:
+   	.word	__BSS_RUN__+__BSS_SIZE__	; Dito
+__hend:
+       	.word	__BSS_RUN__+__BSS_SIZE__
+__hfirst:		 
+   	.word	0
+__hlast:
+   	.word	0
+
+
+;
+; Initialization. Must be called from startup!
+;
+
+.code
+
+__hinit:
+   	sec
+   	lda	sp
+	sbc	__stksize
+	sta	__hend
+	lda	sp+1
+	sbc	__stksize+1
+	sta	__hend+1
+	rts
+
+
+
+
+