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cc65/libsrc/atari/dioqsize.s

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;
; Christian Groessler, February 2005
;
; sectsize_t __fastcall__ dio_query_sectsize(dhandle_t handle);
;
.include "atari.inc"
.export _dio_query_sectsize
.importzp ptr1,tmp1
.import popax, __oserror
.proc _dio_query_sectsize
sta ptr1 ; handle
stx ptr1+1
lda #0
sta __oserror
ldy #sst_sectsize+1
lda (ptr1),y
tax
dey
lda (ptr1),y
rts
.endproc