O 40Crisis μετά τον Invaders Arcade Emulator για CPC
O 40Crisis τον οποίο κάποιοι θα θυμάστε από
-τον Spectrum Emu για CPC
-αλλά και το SPEED-UP patch για το Pac-Man emulator for CPC των SyX & TotO (thanx για το tip Ace)
κι επομένως άριστος γνώστης των δυνατοτήτων αλλά και των περιορισμών των CPC
εξομοιώσε ένα 8080 based μηχάνημα -που αρχιτεκτονικά oι Cpu τους είναι πολύ κοντά (btw η Game Boy CPU ήταν υβρίδιο Ζ80/8080)-
ανέπτύσσοντας τον Space Invaders Arcade Emulatorγια Amstrad/Schneider υπολογιστές.
ξαναχτυπά και πάλι με Invaders Arcade Emulator αυτήν την φορά για Spectrum 128/+2/+2A/+2B/+3 με DIVIDE/DIVMMC Interface V1.00
WHAT IS EMULATED
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- intel 8080 processor. Hopefully z80's designers are the same as 8080 processor and made it fully compatible with 8080 at opcode level
(feature named binary compatible or object code compatible)
- emulator runs emulated game at 60 Hz though display is done at 50 Hz
- graphics identical to original. Rotating the screen 90 degrees
anticlock was a hard job. Resolution used is 224x192 compared to original 224x256.
32 pixels upper part and 32 pixels lower part of the original
arcade display are ignored to fit this more limited resolution.
Scores, remaining ships and credits display have been moved to free 32x192 right area.
- Why a Sinclair Zx Spectrum +2A and above is required without DIVIDE/DIVMMC ?
It's because only theses machines are able to load and execute code in RAM at location [#0000,#4000]. This enable to execute original Space invaders ROM as is.
Divide/Divmmc interface has his own RAM memory located at [#0000,#4000]
V1.01: Added loading screen (22/01/2017)
Loading screen created by Ignacio Prini aka Neil Parsons. Many thanks to him for his great work.
V1.01a: modified colors during loading screen (25/01/2017)
V1.02: added clipping for inverted Y alien sprite (09/03/2017)
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