GRFCONFIG(8)  NetBSD System Manager's Manual (AMIGA Architecture) GRFCONFIG(8)

NNAAMMEE
     ggrrffccoonnffiigg - alter grf device screen mode definitions at run time

SSYYNNOOPPSSIISS
     ggrrffccoonnffiigg [--rr] _d_e_v_i_c_e [_f_i_l_e]

DDEESSCCRRIIPPTTIIOONN
     ggrrffccoonnffiigg is used to change or view the screen mode definition list con-
     tained in a grf device.  You may alter the console screen definition as
     well as the definitions for the graphic screen.  The console will auto-
     matically reinitialize itself to the new screen mode.

     The following flags and arguments are interpreted by ggrrffccoonnffiigg:

     --rr      Print out a raw listing of the mode definitions instead of the
             pretty list normally shown.

     _d_e_v_i_c_e  The grf device to manipulate.  This argument is required.

     _f_i_l_e    The file which contains the mode definitions.  If this argument
             is not specified, ggrrffccoonnffiigg will print out of a list of the modes
             currently loaded into the grf device.

MMOODDEE DDEEFFIINNIITTIIOONN FFIILLEE
     The mode definitions are taken from a file which has lines of the format:

     num clk wid hi dep hbs hss hse ht vbs vss vse vt flags

     _n_u_m     The mode number or 'c' for the console mode.

     _c_l_k     The pixel clock in Hz.

     _w_i_d     The screen mode's width.

     _h_i      The screen mode's height.

     _d_e_p     The bitdepth of the mode.

     _h_b_s _h_s_s _h_s_e _h_t
             The horizontal timing parameters for the mode in pixel values.
             All the values are relative to the end of the horizontal blank
             (beginning of the displayed area).

     _v_b_s _v_s_s _v_s_e _v_t
             The vertical timing paramters for the mode in line values.  All
             the values are relative to the end of vertical blank (beginning
             of the displayed area).

     _f_l_a_g_s   By default every mode uses negative horizontal and vertical sync
             pulses, it is non-interlaced and does not use scandoubling.

                   default        Use the default flags: -hsync -vsync

                   doublescan     Doublescan mode

                   interlace      Interlace mode

                   +hsync         Positive horizontal sync pulses

                   -hsync         Negative horizontal sync pulses


                   +vsync         Positive vertical sync pulses

                   -vsync         Negative vertical sync pulses

                   sync-on-green  Composite sync on green

      ------------------------------------------------------
      |                           ^                        |
      |                          vse                       |
      |      (0,0)                                         |
      |        *-----------------------------------        |
      |        |                  ^        ^      |        |
      |        |                 vbe       !      |        |
      |        |                           !      |        |
      |        |                           !      |        |
      |<-hse   |<-hbe                      !      |<-hbs   |      |      |
      |        |                           !      |   hss->| hse->| hbe->|
      |        |                          hi      |        |      |      |
      |        |                           !      |        |
      |        |                           !      |        |
      |        |<============ wid =========+=====>|        |
      |        |                           !      |        |
      |        |                           !      |        |
      |        |                           !      |        |
      |        |                           v      |        |
      |        ------------------------------------        |
      |                           ^                        |
      |                          vbs                       |
      |                                                    |
      ------------------------------------------------------
                                  ^
                                 vss
                             - ------- -
                                  ^
                                 vse
                             - ------- -
                                  ^
                                 vbe


SSEEEE AALLSSOO
     console(4),  iteconfig(8),  grfcl(4),  grfcv(4),  grfcv3d(4),  grfet(4),
     grfrh(4),  grfrt(4),  grful(4)

HHIISSTTOORRYY
     The ggrrffccoonnffiigg command first appeared in NetBSD 1.0

     The mode definition file changed two times.

     In NetBSD 1.0 all horizontal values were videoclock cycle values instead
     of pixel values:

      num clk      wid hi  dep hbs hss hse hbe ht  vbs vss vse vbe  vt
      1   31000000 640 480  8   80  86  96 102 104 480 489 492  517  520
      2   31000000 640 480  8   80  86  96 102 104 240 244 246  258  260
      3   31000000 640 480  8   80  86  96 102 104 960 978 984 1034 1040

     In NetBSD 1.1 and NetBSD 1.2:

      num clk      wid hi  dep hbs hss hse hbe ht  vbs vss vse vbe  vt
      1   31000000 640 480  8  640 688 768 816 832 480 489 492  517  520
      2   31000000 640 480  8  640 688 768 816 832 240 244 246  258  260
      3   31000000 640 480  8  640 688 768 816 832 960 978 984 1034 1040


     the vertical values were used to select the interlace or doublescan mode.
     All vertical values were half the width for the interlace mode and twice
     the width for the doublescan mode.

     Beginning with NetBSD 1.3:

      num clk      wid hi  dep hbs hss hse ht  vbs vss vse vt  flags
      1   31000000 640 480  8  640 688 768 832 480 489 492 520 default
      2   31000000 640 480  8  640 688 768 832 480 489 492 520 interlace
      3   31000000 640 480  8  640 688 768 832 480 489 492 520 doublescan
      4   31000000 640 480  8  640 688 768 832 480 489 492 520 +hsync +vsync

     hbe and vbe are computed in the grf drivers.

BBUUGGSS
     ggrrffccoonnffiigg can not set the modes for /dev/grf1, /dev/grf2 and /dev/grf4
     and it will not work for /dev/grf0.


NetBSD                          October 7, 1994                              3