Pogo, Raygun and 4 items; patching what they do.

[levellord]

This topic promises to become larger as I get more time to find more tiles. Here is what I have:

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Items:
#Battery
%patch $4452 $C7 $06 $9C $AA $01 $00
#Joystick
%patch $4446 $C7 $06 $94 $AA $01 $00
#Vacum
%patch $445E $C7 $06 $96 $AA $00 $00
#Whiskey
%patch $446A $C7 $06 $98 $AA $01 $00

Values:

$00 $00 at the end will make the item not give an item, but still give 1000 points and play the item sound, e.g:

#Vacum doesn't give vacum
%patch $445E $C7 $06 $96 $AA $00 $00

Changing the $9x after the $06 changes what value the item changes. To change what item, etc is got, change this, e.g:

#Vacum gives joystick
%patch $445E $C7 $06 $94 $AA $01 $00


#The pogo:

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#Pogo
%patch $44AB  $C7 $06 $9A $AA $01 $00

Unlike items, the pogo changes the value absolutely; i.e changing the value to $00 $00 will take Keens pogo. Also changing the $9A can make the pogo give [or take?] an item:

#Pogo gives joystick
%patch $44AB $C7 $06 $94 $AA $01 $00

Simalarly the items can give [but not take] a pogo.


Items and pogo give shots or lives:
Use these patches, but change the value its patched to and the shot number:

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#gives extra Keen!
%patch $44AB  $FF $06 $C6 $AA $90 $90
#is a raygun, xx shots:
%patch $44AB $83 $06 $C8 $AA $xx $83

i.e:

#Battery gives 4 shots
%patch $4452 $83 $06 $C8 $AA $04 $83


The raygun works differently, it cannot give either items or pogo it can however:

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#Raygun gives extra Keen!
%patch $44A0  $FF $06 $C6 $AA $90 $90

#Raygun tiles dissapear when touched, but otherwise don't affect Keen [no sound, etc]
%patch $44A0  $7E $06 $C8 $AA $00 $00

Patches specific to various items and the pogo are:

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#Joystick:
#Joystick gives battery [and 2, etc bullets]
%patch $4446  $7E $06 $C8 $AA $02 $00
#Gives whiskey, but plays exit sound.
%patch $4446  $C6 $06 $C8 $AA $02 $00
#Like above but plays raygun sound
%patch $4446  $83 $06 $C8 $AA $02 $00

#Pogo:
#Pogo kills Keen, but without the death sprite.
%patch $44AB  $5F $06 $C8 $AA $00 $00
#Pogo tiles dissapear when touched, but otherwise don't affect Keen
%patch $44AB  $7E $06 $C8 $AA $00 $00
#Pogo gives keen two keys, battery, whiskey, and acts like a raygun. Also kills keen, but gives him an extra life as compensation.
%patch $44AB  $9F $06 $C8 $AA $00 $00
#Like above, but inconpatible with godmode
%patch $44AB  $AF $06 $C8 $AA $00 $00
#Pogo plays exit sound, no points, and no pogo either!
%patch $44AB  $C6 $06 $C8 $AA $00 $00
Pogo kills Keen, he gets a key and the whiskey.
%patch $44AB  $CE $06 $C8 $AA $00 $00
#Pogo completes level, gives you battery and three keys
%patch $44AB  $C9 $06 $C8 $AA $00 $00
#The sound the pogo makes when got
%patch $44B2  $0A $00

#Vacum:
#Vacum gives 256 lives and 256'000 points for each second Keen touches it;
#Doesn't dissapear
%patch $445E $7E $06 $C8 $AA $02 $00

Enjoy!

[KeenRush]

Phew, after several tries I finally managed to write a version that fits into the space.. One gotta make patches as small as possible.. Dunno if this is yet the smallest version possible. I'm very pleased since this is the first patch of mine that does a bit more advanced assembler (jumps and logic).

Anyways;

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# This patch makes raygun tiles take Keen's pogo if Keen has pogo,
# and give Keen pogo if he hasn't got one.
# This patch overwrites pogo tile code, so if you use pogo tiles
# they do nothing but disapper the same way for example the
# collectiables do. You can hear the sound, but you won't get any
# points or ammo or whatever..

%patch $449A $83 $7E $F6 $0F $75 $11 $83 $3E $9A $AA $00
             $B8 $01 $00 $74 $03 $B8 $00 $00 $A3 $9A $AA $90

[levellord]

Now with teleporter and lightswitch properties!

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#This code will make an item or pogo a teleporter, teleporting
#with the item sound and 1000 points.
%patch $4452 $C7 $06 $60 $6C $02 $00

#This code will make an item, pogo or teleporter into a lightswitch
%patch $4452  $C7 $06 $58 $82 $02 $00

e.g:

#Whiskey is a teleporter
%patch $446A $C7 $06 $60 $6C $02 $00

Also however, the $02 can be changed:

#Teleporter
$00 Nothing, just gives 1000 points and item sound
$01 Exit level
$02 Teleport to secret level teleporter

#Lightswitch:
$00 and $01: Disable
$02 and higher Act like a lightswitch

e.g:

#Vacum exits level
%patch $445E $C7 $06 $60 $6C $01 $00

This can be applied to the teleporter as well, and there is also a special teleporter patch useful for easy\med\hard mods where you want to use the same level but not all of the teleporters:

#Teleporter exits level:
%patch $4572 $C7 $06 $60 $6C $01 $00

#Telepoerter tile acts like nothing
%patch $4572 $C7 $06 $98 $AA $01 $00

Enjoy!

[XkyRauh]

Just to clarify, LevelLord, when the Vacuum patch "exits the level," does it mark the level as completed on the map screen? Or does it simply remove Keen from the level, leaving it open to be accessed again?

[grelphy]

As another question, what happens when you use the teleporter patch with the "item-to-tport" patch, what happens? Does it work like a regular (single-use) teleporter, or does it just lock up?

[Stealthy71088]

Patches that affect tiles! Its a dream come true.

Ok here are my comments/ requests

1. could something take the joystick or battery, or one of those fun filled objects?

2. Could the light switch be adjusted so that a certain tile that is black, turn white, or something visible in the dark, while other tiles act normal? A glow in the dark tile thingy? You could make secret passages, and hidden messages, and all sorts of fun things with it :)

[levellord]

Clarifications:

Tile properties 'reference' to code. Changing the teleporter to say, a lightswitch won't delete the teleporter code. If say, the whiskey is made into a teleporter, it will work just like... well, a teleporter.

The 'exit level' property marks the level as done.

I'm not sure about something taking an item, it may be possible, but would need some code rewriting.

As for special lightswitch tiles, this will involve altering the lightswitch code, and most likely the palettes as well, sorry.

[Freeyorp101]

Is there a way to make the parts exit the level and still give the parts?

sorry, it's getting old but...

[levellord]

No, not with the current patch format, although I do believe Spleen may be able to help you there.

[I really should look into these again sometime, I bet I could do a lot more]