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Necrosis C64/128

INSTRUCTIONS COMMODORE 64 NECROȘIS It started on the night shift at St. Jude's Infirmary. By midnight, the wards were full of the dead - and the dead were hungry. You wake alone on a gurney. Three people are still alive somewhere in the dark: a nurse on the wards, a priest who went down into the catacombs, and a nun ringing the chapel bell in Blackmoor Cemetery. Fight, run and climb your way out through the infirmary, the undercroft and the graveyard. Save who you can. Do not get bitten. CONTROLS Joystick in port 2, or the keyboard: O (letter O) left · P right · Q up · A down · SPACE - fire Up - jump on the spot, or climb a ladder. Up + left/right - a running jump across gaps and onto ledges. Down - climb down through a hatch, or take a weapon you are standing over. Fire - swing the axe, fire the shotgun, or shove a zombie away with your bare hands. YOUR MISSION Each level ends at an EXIT in its very last screen: a hatch down from the infirmary, then ladders up and out. Climb the final ladder in the cemetery to escape. On the way, walk up to each survivor to save them: Nurse Ellen Hayes, Father Tom Reilly and Sister Agnes Morrow. They have all been bitten. The nurse turns after 5 minutes, the priest after 10, and anyone left alive after 20 minutes- and a survivor who has turned is a zombie until you put them down. Watch the clock on the status panel. Can you save them or just yourself? REV2 update. Changing screens (the main cause): drawing each new room took about three-quarters of a second, with the screen blanked the whole time. That happens at every screen edge and adds up over a playthrough. Rewrote the room-drawing loops in assembler and now build the new room while the old one is still showing. A screen change now takes about 0.13 seconds, with the screen blank for about one frame. Zombies that have your scent: they never go back to sleep, so the further you get, the more there are to update. With every zombie on the level awake, the game dropped to 10–12 frames a second. Zombies two or more rooms away now go on a separate list and are moved a few at a time. Those queued in the next room only wait at the edge while the screen already holds four. The same worst-case now runs at about 24–25 frames a second. They still follow you from screen to screen.Smaller savings: sleeping zombies are checked less often, choosing which zombies to draw is quicker when four or fewer are in the room, and a slow division, the game is done every frame. Ordinary scenes on all three levels now measure 46–48 frames a second with the profiler running, so a normal build should be close to 50. Game clock: now runs on the C64's built-in real-time clock. Before, it counted frames, so it ran slow whenever the game did. This also means the nurse, priest and remaining survivors now turn at true 5, 10 and 20 minutes. Reported bugs.Text crawl at the end of the game may slow down.