release:zzt40
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Table of Contents
ZZT 4.x
ZZT 4.0 and 4.1 are hex edits of ZZT 3.2 created by WiL for widespread use.
ZZT 4.0
Documentation
The major changes here:
ZZT's notorious 20k board limit has now been increased to a healthier 32k.
ZZT's equally notorious bottomw-row placement bug has been fixed.
ZZT's annoying water-glink sound effect is now removed.
ZZT is now 39k, smaller than the original executable.
Minor changes include:
Textual changes - also, untitled.zzt, temp.brd, and saved.sav will no longer be the default. Now by >default you must put in a name of your own. This means no more angst over accidentally saving over your >last board, saved game, or ZZT project.
In addition, ZZT 4.0 came with a separate NoMsg variant, additionally changing:
* in-game messages and sound effects (that i have found so far) removed: Except the invisible wall message and sound effect. I coudln't justify removing that one. And the key and door messages.
* No yellow borders.
Changes
Some of the documented changes are inaccurate with regards to the in-executable changes.
Functional
- The IoTmpBuf allocation calls have been patched to allocate a size of 0xFFFF (65535) rather than 0x4E20 (20000) bytes (offset 0x2387, 0x23E8).
- The flag name SECRET is replaced with EDITED (offset 0x9651).
- The
Y < 25requirement from OopExecute's #PUT handling is replaced withY < 26, fixing the #PUT bottom row bug (offset 0xC9E1).
Branding
| Description | Location | Original string | Modified string |
|---|---|---|---|
| Configuration screen, second line (shareware) | 0x1C44 | Shareware version 3.2' | New! ZZT Version 4.0 |
| Configuration screen, second line (registered) | 0x1C7A | Version 3.2 | Version 4.0 |
| Copyright notice | 0x1CA9 | Created by Tim Sweeney | By Tim Sweeney and WiL |
| Copyright notice | 0x1D42 | Copyright (c) 1991 Epic MegaGames, Press ... to abort' | Public Domain since 1997. ZZT 4.0 released in 2004, ... to quit ' |
| Shutdown notice (registered) | 0x217F | Registered version -- Thank you for playing ZZT. | Thanks for playing! ZZT 4.0 made by WiL. . |
Graphics/Names
| Description | Location | Original string | Modified string |
|---|---|---|---|
| Default save filename | 0x2173 | SAVED | Empty (length set to 0) |
| Default exported board filename | 0x2179 | TEMP | Empty (length set to 0) |
| Energizer pickup message | 0x4468 | Energizer - You are invincible | Empty (length set to 0) |
| Default object name | 0x4EF4 (ElementObjectTick), 0xBF4D (OopExecute) | Interaction | Empty (length set to 0) |
| Ammunition pickup message | 0x56C5 | Ammunition - 5 shots per container. | Empty (length set to 0) |
| Gem pickup message | 0x5750 | Gems give you Health! | Empty (length set to 0) |
| Fake wall message | 0x5D8B | A fake wall - secret passage! | A fake wall - secret passage!U |
| Editor board name prompt | 0x7AC0 | Room's Title:, Board Name: (length edited) | |
| Sidebar - default world name | 0x109C1 | Untitled | Empty (length set to 0) |
- The fake wall message change seems to be an accident - the string length is incremented by one, causing the first byte of ElementFakeTouch's code to be added to the string.
Sounds
| Description | Location | Original | Modified | Comment |
|---|---|---|---|---|
| Water step sound | 0x5F40 | #64#1#80#1 | Empty (length set to 0) |
Bugs
| Location | Original | Modified | Comment |
|---|---|---|---|
| 0x5BE0 | 0x00 | 0x2E | This makes ElementPusherTick remove 46 bytes from the stack every time it is called, causing a stack underflow and a crash after exactly seven pusher ticks if nothing else is done. The intent of adding this seems to be a misplaced hex edit pertaining to the torch's pickup message, which immediately follows said method. |
Changes (NoMsg variant)
- The following messages have their lengths set to 0:
Bomb activated!(offset 0x3E38),A path is cleared through the forest.(offset 0x5D0A),A fake wall - secret passage!(offset 0x5D8B),Your way is blocked by water.(offset 0x5F45),Game over - Press ESCAPE(offset 0x6183),Can't shoot in this place!(offset 0x619F).
- The following sounds have their lengths set to 0:
- Energizer melody (offset 0x43F7 - pickup, 0x625C - running out),
- Scroll pickup (offset 0x54D0),
- Key pickup failure (offset 0x5597),
- Key pickup success (offset 0x55B4),
- Ammo pickup (offset 0x56BE),
- Gem pickup (offset 0x5747),
- Door open success (offset 0x5815),
- Door open failure (offset 0x5835),
- Torch pickup (offset 0x5C0F),
- Torch burnout (offset 0x6255),
- Running out of time (offset 0x6280).
- The yellow border tile definition is replaced with a white-on-black Empty (offset 0x175FE).
- The misplaced torch pickup message hex edit is undone, removing the Pusher stack underflow crash bug (but not the message!).
Links
release/zzt40.1614539315.txt.gz · Last modified: 2021/02/28 19:08 by asie