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Text File  |  1987-03-31  |  2KB  |  43 lines
  1.    IFND  GRAPHICS_DISPLAY_I
  2. GRAPHICS_DISPLAY_I   SET   1
  3. ****** display.i ***************************************************/
  4. *                                                                  */
  5. *               Commodore-Amiga, Inc.                              */
  6. *                                                                  */
  7. *                  Modification History                            */
  8. *  date    :   author :    Comments                                */
  9. *  -------     ------      --------------------------------------- */
  10. *  8-24-84     Dale        added this header file                  */
  11. *                                                                  */
  12. ********************************************************************/
  13.  
  14. * include define file for display control registers */
  15. * bplcon0 defines */
  16. MODE_640    equ   $8000
  17. PLNCNTMSK   equ   $7                * how many bit planes? */
  18. *                                   * 0 = none, 1->6 = 1->6, 7 = reserved */
  19. PLNCNTSHFT  equ   12                * bits to shift for bplcon0 */
  20. PF2PRI      equ   $40               * bplcon2 bit */
  21. COLORON     equ   $0200             * disable color burst */
  22. DBLPF       equ   $400
  23. HOLDNMODIFY equ   $800
  24. INTERLACE   equ   4                 * interlace mode for 400 */
  25.  
  26. * bplcon1 defines */
  27. PFA_FINE_SCROLL       equ   $F
  28. PFB_FINE_SCROLL_SHIFT equ   4
  29. PF_FINE_SCROLL_MASK   equ   $F
  30.  
  31. * display window start and stop defines */
  32. DIW_HORIZ_POS         equ   $7F     * horizontal start/stop */
  33. DIW_VRTCL_POS         equ   $1FF    * vertical start/stop */
  34. DIW_VRTCL_POS_SHIFT   equ   7
  35.  
  36. * Data fetch start/stop horizontal position */
  37. DFTCH_MASK            equ   $FF
  38.  
  39. * vposr bits */
  40. VPOSRLOF              equ   $8000
  41.  
  42.    ENDC
  43.