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cc65/libsrc/cx16/vaddr0.s

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;
; 2019-12-22, Greg King
;
; Set the __far__ address that VERA will use for data access.
; This is a support function for the fastcall functions vpeek() and vpoke().
;
.export vaddr0
.importzp sreg
.include "cx16.inc"
vaddr0: stz VERA::CTRL ; set address for VERA's data port zero
ldy sreg
sta VERA::ADDR
stx VERA::ADDR+1
sty VERA::ADDR+2
rts