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     .                   º  GRAVITATION  º
                          ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ            
     .    .              v1.3DR(DemoRecorder)        .

     .                            by                 .

                         James Shaughnessy          .

                              (C) 1998


 *** SPECIAL DEMO RECORD VERSION! ***

 It only works in 1 player and PODS are disabled (because of the random
 factor - and lack of memory I'm afraid), and digital pad only
 (yeah, like you'd try for a record-breaking time in ANALOG mode)
 Also a PAL recording will only work properly in PAL mode,
 and the same for NTSC, because of the different syncronization.
 For this reason they are kept separate in memory -- ie a recording
 an NTSC demo will NOT overwrite a demo saved in PAL mode, and you
 can only view a PAL recording in PAL mode.

 Type SAVEPAL or SAVENTSC at the DOS prompt to save the relevant demos
 in memory to "MYPAL.DAT" or "MYNTSC.DAT" in the current directory
 respectively.  This will overwrite any previously saved demos of that
 name, but will not wipe Grav's default demos (DEMOPAL.DAT and
 DEMONTSC.DAT) unless you manually rename them.
 The original demos that come with Grav can be found on my page on the
 Hall Of Fame table (FTP/DEMODEF.ZIP) if you want to restore them.


 *** INSTALLATION ***

 This is an add-on so you will need to have/download GRAV13.ZIP too by
 the way.   Unzip the archive to your normal Grav v1.3 directory,
 Then type DEMOREC to upload all the files to the yaroze, in the normal
 way.  Type SIOCONS QUICKDR to quick load it after you've ran it
 once (SIOCONS QUICK will load the NORMAL version)


 *** TECHNICAL STUFF ***

 Records 50 bytes per second PAL, 60 bytes per second NTSC
 so 72K = approx 24 minutes PAL and 20 minutes NTSC
 8K = 2m16.53s maximum per level (NTSC) starting at DEMO_ADDR
 8K = 2m43.84s maximum per level (PAL) starting at DEMO_ADDR+DEMO_SIZE

 DEMO_SIZE MUST be evenly divisible by nine (ie 72K = 8K per level)
 Automatically records a demo for each map in correct location, and
 limits maximum size.

 Per frame, a single byte is recorded for the ship input status
 (much more efficient than storing ship coordinates and means the
 recording goes through the normal game engine ie. easier to implement)

 &  BIT
  1  0  Fire 1
  2  1  Fire 2
  4  2  Thrust
  8  3  Reverse Thrust
 16  4  Airbrake
 32  5  Left
 64  6  Right
128  7  End of demo



If you reckon your pretty nifty with the Grav or you have any mates who
do, why not record a demo of your skills, zip it up and send it to me --
especially if you can beat my times (quite possible -- look at the
standard demos and you'll see loads of room for improvement. No really!)
But be warned -- it's harder when you know it's being recorded and
also more frustrating when you crash!  Believe me!


Cheers,
Jim                      1st Sept (c)1998
-----------------------------------------
James Shaughnessy    james@manc.u-net.com
http://www.netyaroze-europe.com/~shaughnj
-----------------------------------------