APPENDIX FIFTEEN



with GRAPHICS 6 where each line is two scan lines (GRAPHICS 14 is
sometimes called GRAPHICS 6-1/2). BAK and PF0 are the two-color
registers; the first bit of a screen byte identifies the color.

GRAPHICS 15 has been made popular by many drawing and paint-
ing programs such as Datasoft's Micropainter and both Koala's and
Atari's drawing programs for their touch tablets, It is a four-color
mode with a resolution of 160 across X 192 down (160 with text
lines), each screen line being one scan line high. Colors are BAK,
PF0-PF2; only the first two bits of a screen byte identify the byte
color. It is sometimes called GRAPHICS 7-1/2.

                                        Memory Used
                                        -----------
Mode        Lines       Colors   Split Screen   Full Screen
12       40 X 20/24       5          1154          1152
13       40 X 10/12       5           664           660
14      160 X 160/192     2          4270          4296
15      160 X 160/192     4          8112          8138

Here are the pinouts on the 800 and XL/XE's monitor jack (looking at
the back of the unit):


                              *     * 
                           *  *     *  *
                         *    *******    * 
                        *                 *
          Audia output *  3             1  * Composite luminance
                       *                   *
                       *                   *
      Composite chroma  *  5           4  *  Composite video
       (not available    *               *
       on XL models)       *     2     *
                              *     *
                              Ground