home *** CD-ROM | disk | FTP | other *** search
/ Floppyshop 2 / Floppyshop - 2.zip / Floppyshop - 2.iso / diskmags / 5791-.end / dmg-5873 / 3rdguide / shifter.txt < prev    next >
Text File  |  1998-10-24  |  3KB  |  56 lines
  1. DESKTOP ⑧x1k1
  2.                                 חללללללללללללללללל†
  3.                                 ´     SHIFTER     ´
  4.                                 ´ bit assignments ´
  5.                                 זללללללללללללללללל¶
  6.                                  Atari SHIFTER
  7.               םגגגגגגגגגגגגגגגגג™
  8.               ø SYNChronization ø     b9=frequency (synchronization=internal)
  9.               ø                 ø        -:             (resolution=high)
  10.               ø                 ø                         frequency=71 Hz
  11.               ø                 ø                            screen=501 lines
  12.               ø                 ø                              line=28 µs
  13.               ø                 ø                    display enable=line 36 &
  14.               ø                 ø                                   col. 0 µs
  15.               ø                 ø        0:             (resolution=medium/low)
  16.               ø                 ø                         frequency=60 Hz
  17.               ø                 ø                            screen=263 lines
  18.               ø                 ø                              line=63.5 µs
  19.               ø                 ø                    display enable=line 35 &
  20.               ø                 ø                                   col. 6.5 µs
  21.               ø                 ø        1:             (resolution=medium/low)
  22.               ø                 ø                         frequency=50 Hz
  23.               ø                 ø                            screen=313 lines
  24.               ø                 ø                              line=64 µs
  25.               ø                 ø                    display enable=line 48/64 &
  26.               ø                 ø                                  =col. 7 µs
  27.               ø                 ø     b8=synchronization
  28.               ø                 ø        0:internal
  29.               ø                 ø        1:external
  30.               ijגגגגגגגגגגגגגגגגגך
  31.                    םגגגגגגגגגגגג™
  32.                    ø RESolution ø  b9-b8=resolution
  33.                    ø            ø        00:low
  34.                    ø            ø        01:medium
  35.                    ø            ø        10:high
  36.                    ijגגגגגגגגגגגגך
  37.                    םגגגגגגגגגגגג™
  38.                    ø Video Base ø[b23-b8]=video base
  39.                    ijגגגגגגגגגגגגך
  40.                 םגגגגגגגגגגגגגגג™
  41.                 ø Video Counter ø[b23-b0]=video counter
  42.                 ø               ø         (1 word read each 500 ns)
  43.                 ø               ø         (when display enable)
  44.                 ø               ø         (without wait state for MC68000)
  45.                 ijגגגגגגגגגגגגגגגך
  46.                םגגגגגגגגגגגגגגגג™
  47.                ø Color Register ø b10-b8=[b2-b0]=red   level
  48.                ø                ø  b6-b4=[b2-b0]=green level
  49.                ø                ø  b2-b0=[b2-b0]=blue  level
  50.                ø                ø              (resolution=high   CR0b0=Ink    )
  51.                ø                ø              (                        0:white)
  52.                ø                ø              (                        1:black)
  53.                ø                ø              (resolution=medium CR0-CR3  used)
  54.                ø                ø              (resolution=low    CR0-CR15 used)
  55.                ijגגגגגגגגגגגגגגגגך
  56.