-----Original Message----- From: Si Owen <[EMAIL PROTECTED]> To: [email protected] <[email protected]> Date: 13 September 1999 13:34 Subject: Defender on SimCoupe (Was: Defender Source Code)
>I've only just got around to playing this - it's a superb port! I think a >few of us will pay you back in beer or something :-) ;-) Thanks, I'm glad you like it! >The difficulty is very authentic too as I've yet to get past the 2nd wave! >We're you one of those people that could spend hours playing a single game?? Er, 'fraid not! I was pretty hopeless at the arcade original. I wasn't too bad at that other classic '80's William's shooter... The masterpiece that is Robotron 2084! Yes, I've already thought about a port!! Trouble is, the original had a blitter and I don't think the SAM has nearly enough horespower to pull a decent version of this one off. >I think I've tracked down some of the problems with it running under >SimCoupe... I experienced the same running fast and slow when down to the >last few landers. That's horrible, isn't it! >Seems to be to do with instruction timing, as after I added an approximate >form of memory >contention(*) and it seems to be fine now. I'm guessing it normally runs at >25fps, so the uncontended >timings meant it could manage a frame in under 1/50th when there wasn't so >much to do. Ah, you might have a problem here as it normally runs at 1/50th on a real SAM... 25fps would have been sacrilege to the original. ;-) The struggle to keep the game at a constant 50fps was one of the main reasons for the strange 'have I missed a frame' code. >If only I could stop myself getting distracted by minor (but worthwhile, I >suppose) details I might even get the Win32 to a releasable state. I seem >to have a bad habit of chipping away at lots of bits instead of >concentrating on each one and finishing them off. *sigh* I'll be great when you finish it, hopefully with decent sound and a VSync option!! :-) Chris.
