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" © 1988 North Star.
This install requires WHDLoad to be in the path.
To install from a different drive than DF0: select installation mode Expert.
The installed demo requires 0.5 MB ChipMem (+1.1 MB OtherMem for preload).
It can be quit by pressing F10 (key can be changed with Tooltype "QuitKey=").
- Full load from HD
- OS stuff patched (AllocMem, FreeMem, file loading, relocation etc.)
- Byte write to CopJmp1 fixed (x5)
- Bplcon0 color bit fixes (x19)
- Self-modifying code fixed
- Write to HTOTAL ($dff1c0) fixed
- DMA wait in replayer fixed (x5)
- Wrong memory allocation checks fixed (x2)
- Modulo bugs fixed (x2)
- Timing fixed
- CPU dependent delay fixed
- Bugs in scrolling routines fixed (x3)
- Reset at end of demo patched to quit back to DOS
- Copperlist bugs fixed
- Interrupt fixed
- NewIcon (created by me)
- Source code included as usual
- Quit option that works on 68000 machines (default key is 'F10')
This was fun to do, yet another classic and still entertaining
demo has now been patched. Worth mentioning is that all parts use
standard relocatable executables and allocate the needed memory
using AllocMem, so (almost) no absolute addresses were used, definitely not
common for a 1988 demo! Restoring the system copperlist was done assuming
the default copperlist is at address $22f8, this only worked correctly
on Kickstart 1.2, on all other Kickstarts invalid copperlists were
restored resulting in a lot of graphics trash at the end of each part.
Fixing this wasn't much of a problem though.
There were some glitches with the scrollers in some of Atom's parts
that kept me busy for a while but I found a good enough workaround I hope.
These problems only occured on fast machines for some reason.
All files in the "data" directory can be packed with any of the crunchers
supported by WHDLoad (FImp, ProPack etc.).
Enjoy yet another classic demo from HD. This patch is dedicated to the
memory of Atom!
Greetings to all in Scarab and Scoopex, the WHDLoad team, PMC,
Musashi5150, Skan, Slummy, Loaderror, Frequent, Wayne Kerr, Mr.Spiv,
Alpha One, CFou!, Paradroid, Audiomonster, Vention, Slammer
Axis, Tim, Triace, Britelite, Buzzer and all the other usual suspects. :)
Special greetings to all Golf MK1 fans worldwide and all classic
car owners/drivers. :)
Extra greetings to the usual suspects on #amigascne, see you all at
Revision 2017! :)
version 1.00 (08.06.2016) done by StingRay:
- initial release
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: