git.sur5r.net Git - cc65/blob - libsrc/atari/dioread.s

   1 ;
   2 ; Christian Groessler, October 2000
   3 ;
   4 ; this file provides the _dio_read function
   5 ;
   6 ; unsigned char __fastcall__ dio_read(dhandle_t handle,sectnum_t sect_num,void *buffer);
   7 ; dhandle_t - 16bit (ptr)
   8 ; sectnum_t - 16bit
   9 ;
  10
  11         .import         __sio_call,pushax
  12         .export         _dio_read
  13         .include        "atari.inc"
  14
  15 .proc   _dio_read
  16
  17         jsr     pushax          ; push buffer address
  18         ldx     #%01000000      ; direction value
  19         lda     #SIO_READ       ; read sector command
  20         jmp     __sio_call      ; do the call and return to the user
  21
  22 .endproc
  23