Atari800MacX Help

Compatibility



Years of developement of the Atari800 emulator by different people have it running almost 100% of Atari software. Take it into consideration before you complain ‘The program x doesn’t work with the emulator’. Most of non-working programs we receive are corrupt. They can’t be run on a real Atari computer, thus they don’t work with the emulator.

The emulator’s compatibility rate is growing continuously. You can help us by reporting any non-working software. Please check this first.  This is the list of all known bugs in the emulation.  Some others may have crept in during the development of the Macintosh version, but are not known at this time.

A few keyboard-related bugs:
  - e.g. pressing SHIFT+1 and then releasing SHIFT should still give '!' characters

The cycle-exact ANTIC/GTIA/CPU timing is not 100%.
  This causes display bugs in following programs:
  - Surf's up (game) (The horizon)
  - Dimension X (game) (aligment problem? not tested on acutal machine)
  - Te.mod (demo) (small glitched pixel in the final credits on the bottom left)
  - The break(demo) (bug may exist in the original, check)
  - Our 5oft Unity Part (demo) (cycle-aligment, probably WSYNC)
  - Endless Dream (demo) (credits in the intro)
  - Ergo Bibamus (demo) (one pixel of the flower above the perspective scroll)
  - Isolation (demo) (vector animations)
  - Sweet Illusions (demo)
     (sprites highlighting the scroll below wireframe vectors)

Non-bugs:
  - Mail Order Monsters (game)
     (some colour changes do not align with text, occurs on a real Atari)

The following programs are improved by using the new cycle-exact code
  - 8 Players Demo (demo)
  - Bewesoft's Demo (demo)
  - Bitter Reality (demo)
  - Demonic Laughter (music collection)
  - Extract (graphics collection)
  - GED (graphics editor)
  - Joyride (demo)
  - Mail Order Monsters (game)
  - Master of the Lamps (game)
  - Orneta '95 invitro (demo)
  - Our 5oft Unity Part (demo)
  - Studio Dream (demo)
  - Sweet Illusion (demo)
  - Te.mod (demo)
  - The Break (demo)
  - Miner 2049'er (game) (rotating 5's)
  - Dimension X (game) (title screen upper and lower bars)
  - Graphics impossible (demo) (Antic magazine)
(not tested:)
  - Power Graph (graphics editor)
  - Darkness Warrior (picture)

POKEY interrupts are scanline-, not cycle-exact.
  This causes sound bugs in following programs:
  - Mirax Force (game)
  - Saturday Demo (demo)
  - The Last Guardian (game)

Sound emulation is not accurate enough
  This causes sound bugs in following programs:
  - Numen (demo)

Sound emulation uses VOL_ONLY_SOUND hack.
  This causes sound bugs in following programs:
  - Digital Trash (demo)
  - Ghostbusters (game)
  - Overmind (demo)

Intensive 130xe-banks switching slows down emulation much.
  This causes performance problems in following programs:
  - Impossible but Real (demo)
  - Sheol (demo)
  - Total Daze (demo)
  - Ultra (demo)