Lethal Zone WHDLoad Pack

README
Short : HD-Installer for Lethal Zone V1.2
Type : game/patch
Author : Bored Seal (bored@whdload.de) & StingRay

This patch applies to "Lethal Zone" by Infernal Byte System (c) 1991 - 1 disk.
Slave requires WHDLOAD V17+.
Game requires 0.5 MB Chip Mem (+0.9MB of any memory for preload option)

FEATURES:
- Full load from HD
- PP20 decruncher relocated to Fast RAM
- CPU dependent loops fixed
- Blitter waits added (1x)
- Keyboard routine added (3x)
- Highscores will be saved
- Trainer option added (set CUSTOM1=1 for unlimited lives)
- ROM/NI icon (created by JHZ)
- Quit option (your default key)


FEATURES v1.1 (29-Dec-2015) done by StingRay:
- Wrong copperlist fix corrected
- Illegal/out of bounds blits fixed
- Timing fixed
- "Lazy" blitterwait patch replaced with just 2 really needed blitter waits
- Lots of new trainer options added (CUSTOM1/2, see below)
- High-score saving disabled if any trainers are used
- PowerPacker decruncher slightly optimised
- Keyboard interrupts added
- Uses WHDLoad v17+ features (config)
- New install script
- Source included

FEATURES v1.2 (14-Aug-2016) done by StingRay:
- fixed timing and interrupt bug which caused the game to freeze
- timing fixes are optional now and have to be enabled with CUSTOM3

 Notes V1.2:
 -----------
 There were bug reports that the game would lock up completely and a reboot
 of the machine was the only possible option. Not good of course! Today
 I had a look and found the problem, it was caused by the replayer using
 and changing register a5 outside the vertical blank interrupt, if a
 VBI occured while the replayer was called, the interrupt would lock up
 the machine as a5 didn't contain the expected custom base ($dff000).
 I have fixed this now and the game should now work fine! I have also made
 all timing fixes optional, they now have to be enabled with the CUSTOM3
 tooltype.

 
 Notes V1.1:
 -----------

 I have updated the patch for this rather nice R-Type clone. The wrong
 copperlist fix has been corrected, some timing fixes have been added,
 the out of bounds blits have been fixed so game will not blit outside
 the $80000 memory area anymore and I also have added quite a few trainer
 options. Since I have updated the patch to use WHDLoad v17+ features the
 trainer options can be selected in WHDLoad's splash window. If in-game keys
 are enabled the following extra keys are available:

    L - toggle unlimited lives
    B - toggle unlimited beams
    F - toggle unlimited fuel
    D - toggle between single/double weapon
    N - skip level

 Additionally, the built-in cheat keys will be enabled as well, these are:
    F5 - invincibility on
    F6 - invincibility off
    F7 - add life
   1-6 - select song
 F1-F4 - select level


 The starting level (1-4) can be selected with CUSTOM2.

 If any trainer options are used the high-score saving will be disabled!

 Happy new year everyone,
 Sting, 29-Dec-2015


NOTES:
 Game was released on Amiga Fun coverdisk 10/91.
Slave will automatically convert your old highscore table from image to file.

Thanks to Helmut Motzkau for disk image.

         Bug report form, full WHDLoad package and other installs:
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