THIS PACKAGE COMES WITH ABSOLUTELY NO WARRANTY OF ANY KIND, EITHER EXPRESS OR
IMPLIED, STATUTORY OR OTHERWISE. THE ENTIRE RISK AS TO USE, RESULTS AND
PERFORMANCE OF THE PACKAGE IS ASSUMED BY YOU AND IF THE PACKAGE SHOULD PROVE
TO BE DEFECTIVE, YOU ASSUME THE ENTIRE COST OF ALL NECESSARY SERVICING,
REPAIR OR OTHER REMEDIATION.
UNDER NO CIRCUMSTANCES, CAN THE AUTHOR BE HELD RESPONSIBLE FOR ANY DAMAGE
CAUSED IN ANY USUAL, SPECIAL, OR ACCIDENTAL WAY, ALSO IF THE OWNER OR A THIRD
PARTY HAS BEEN POINTED AT SUCH POSSIBILITIES OF DAMAGE.
This install applies to "Megademo" © 1989 Dexion.
This install requires WHDLoad and RawDIC to be in the path.
These programs can be found in the WHDLoad package.
To install from a different drive than DF0: select installation mode Expert.
The installed demo requires 0.5 MB ChipMem (+0.7 MB for preload).
It can be quit by pressing F10 (key can be changed with Tooltype "QuitKey=").
- Full load from HD (real files!)
- DMA and interrupt settings fixed
- Interrupts fixed
- Self-modifying code fixed
- Access fault fixed (write to $dfff064)
- DMA wait in replayer fixed (x10)
- Byte write to volume register in replayer fixed (x10)
- Random generator recoded (it relied on $dff007)
- Decrunchers (ByteKiller) relocated to fast memory and error check added
- Bplcon0 color bit fixes (x15)
- Reset at end of demo patched to quit back to DOS
- Level 2 interrupt used to read keys
- NewIcon (created by me)
- Source code included as usual
- Quit option that works on 68000 machines (default key is 'F10')
I always wanted to patch this one, in fact, I first started to work
on the patch back in 2009 after I finished the patch for Dexion's
Megademo 2. Yesterday I finally got around to creating the patch
for the first Megademo, I completelely restarted from scratch and converted
it to a real file based patch. Since this demo has quite a lot of parts
this took several hours to do.
The code is more less OK but there were a few problems, the scroller in
the loader used self-modifying to blit the chars, the CIA interrupt wasn't
acknowledged correctly, in one part there was a typo which caused an
access fault ($dfff064 vs. $dff064) and the replayers had the common bugs,
additionally self-modifying code was used to set the speed which I
have fixed too.
The demo uses ByteKiller crunched binaries, I have relocated all decrunchers
and added an error check, if decrunching fails WHDLoad will quit with an
appropriate error message.
Worth mentioning is that the demo even had checksum checks for each part,
after loading it was checked if the data is OK. Not too common for 1989.
You can download the demo here:
Enjoy yet another classic demo from HD.
Greetings to all in Scarab and Scoopex, the WHDLoad team, PMC,
Musashi5150, Skan, Slummy, Loaderror, Frequent, Wayne Kerr, Mr.Spiv,
Alpha One, CFou!, Paradroid and all the other usual suspects. :)
Special greetings to all Golf MK1 fans worldwide except those
lowlifes who "borrowed" my MK1 for a joyride!
Extra greetings to the usual suspects on #amigascne, see you all at
Revision 2014! :)
version 1.00 (09.09.2013) done by StingRay:
- initial release
- source code included
If you have problems with this installation please try and get a newer
version of this package from the WHDLoad WWW-Page. If that doesn't help try
some Tooltypes like NOCACHE, NOAUTOVEC, EXPCHIP, NOMMU, PAL or NTSC. If
that also fails, please inform the author via the Bug-Report-Form which
can be accessed on the WHDLoad WWW-Page.
For the full WHDLoad package, other installs and updates refer to: