FROTZ V2.22 - an interpreter for all Infocom games. Complies with standard 0.2 of Graham Nelson's specification. Written by Stefan Jokisch in 1995-97 This program once started as a re-make of Mark Howell's Zip, but it has grown into an utterly new interpreter. Frotz is freeware: It may be used and distributed freely provided no commercial profit is involved. (c) 1995-1997 Stefan Jokisch. Please report bugs to: s.jokisch@avu.de Acknowledgements: Many thanks to Paul D. Doherty for his continuing support of this project. Thanks to everyone who sent bug reports, contributions or helpful hints (in alphabetical order): Thomas Biskup, Ian Carpenter, Graeme Cree, Jason Dyer, Carl Edman, Bernhard Fuchs, Joe Hachem, John Kennedy, Kirk Klobe, Marnix Klooster, John Mackin, Ambat Sasi Nair, Alan Sherrod and Linards Ticmanis. Last but not least, thanks to the porters: Amiga................................David Kinder OS/2........................Christopher J. Madsen Unix (curses library).............Galen Hazelwood Windows 95..........................Rich Lawrence Executables are available from ftp.gmd.de and from http://www.geocities.com/SiliconValley/Heights/3222/frotz.html which is the Frotz home page maintained by Chris Madsen. Features: - support for V1 to V8 games - real-time input ('Border Zone') - built-in graphic font ('Beyond Zork', 'Journey') - mouse support ('Beyond Zork' and all V6 games) - function key support including number pad keys ('Beyond Zork') - command line editing and history - word completion (similar to "tcsh" under Unix) - small save files - switches for colour setting - switch for setting the Tandy bit - sound effects ('The Lurking Horror' and 'Sherlock') - cheat functions - multiple UNDO (via hot key, even for old V1 to V4 games) - input line recording and playback (via hot key) - support for European characters ('Zork I German') - underlined, reverse and boldface text - fast performance without virtual memory Special keys: Alt-D - toggle debugging options (-a, -A, -o, -O) Alt-H - help on hot keys Alt-N - new game (restart) Alt-P - turn on input line playback Alt-R - toggle input line recording on/off Alt-S - set the random number seed Alt-U - multiple undo, works even for old V1 to V4 games Alt-X - exit game When testing a text adventure it can be difficult to reproduce a specific bug. To avoid this problem you should use the Alt-R key to record all your inputs in a command file. Later you can press Alt-P to feed the command file back into Frotz. In some cases, however, you will find that the result is different because many games contain random events. Luckily, Frotz provides a hot key to control these events. Type Alt-S and you are asked for a seed value, i.e. a value in the range from 1 to 32767. Normally, you would choose a number >= 1000. Smaller values generate a special sequence of random numbers as proposed by Nelson. (For instance, the seed value 4 generates 1, 2, 3, 4, 1, 2, 3, 4, 1...). In any case, random events become predictable until the next restart. See also the command line option -s below. When you need to type an unpleasantly long word, try to type the first three or four letters then press the tabulator key. If you are lucky, Frotz fills in some or all of the missing letters. A beep indicates that the word is ambiguous or that it does not exist. Syntax: frotz [options] story-file -i ignore runtime errors Set this switch and Frotz no longer worries about anything the game tries to do. This can help you to get around fatal errors. -l # set the left margin -r # set the right margin Setting the margins is a matter of taste; Infocom interpreters usually set a right margin of one character (-r1). -S # set the width of the transscript file By default your transscript files are formatted to a width of 80 columns per line -- regardless of the current screen width. This switch allows you to change this setting. In particular, you can try -S 9999 or similar to deactivate automatic line splitting in transscript files. -c # set the number of context lines When the game prints several pages of text in a row, Frotz stops for a more prompt after each page. The first prompt appears when your input reaches the top of the window. Further prompts appear when the previous page has been scrolled off the window. You can use this switch to make the latter more prompts appear earlier. -u # set the number of undo slots for multiple undo Frotz tries to allocate as much conventional memory as possible for multiple UNDO. If this strategy causes some kind of problem, use this switch to set a tighter limit. In particular, you might want to turn off the UNDO feature altogether by typing -u0. -s # set the random number seed The given seed value is used as the initial seed value on every restart. This is helpful for testing games like 'Curses' which make random decisions before the first input (such that the hot key Alt-S does not really help). The meaning of seed values has been explained in the previous section. -x expand abbreviations (g, x, z ==> again, examine, wait) This switch was made for old Infocom games that lack the common abbreviations introduced in later games. Use it with caution: A few games might use "g", "x" or "z" for different purposes. -o watch object movement -O watch object locating -a watch attribute assignment -A watch attribute testing Although these switches may be of assistance while debugging new games, they are are actually meant to be cheat functions. The -o switch, for example, helps to locate the thief in 'Zork 1' and the cat in 'Curses'. The other switches produce a lot of obscure messages during the game; but some of these messages might give you important clues if you watch carefully. -t set the Tandy bit Some old Infocom games were sold by the Tandy Corporation. These games behave slightly different when you use this option. For example, 'The Witness' gets censored: bastards turn into idiots, private dicks into private eyes and so on. Questions and answers: Q: What is Frotz? A: Frotz runs text adventures which come in so-called story files: ZORK1.DAT, TRINITY.DAT, CURSES.Z5, JIGSAW.Z8, ARTHUR.ZIP etc. Q: Where can I find story files to use with Frotz? A: First, you can use the files from your original Infocom games. It is possible to play Atari ST, Amiga, PC or Macintosh games on your computer once you manage to transfer the story files. Some people even extracted story files from old Atari 800, Apple II and C-64 disks! Second, there is also an increasing number of new games available on the Internet. Check the if-archive at ftp.gmd.de. Q: Why does Frotz stop with an error message? A: It might have detected a bug in the story file other interpreters overlooked. Use the -i switch to run your story file anyway. It's also possible that the story file is corrupt; be sure to download story files in binary mode. Q: What do I need for sound? A: You need the original 'Sherlock' or 'Lurking Horror'. Next get the SHSOUND.ZIP or LHSOUND.ZIP package from ftp.gmd.de (directory is /if-archive/infocom/missing-files). Each package contains a readme file, sound files and a tool to update your old story file. Follow the instructions in the readme file. Q: When exactly should I hear sound? A: Here are two examples: In 'Lurking Horror', you can hear chanting during your dream in the terminal pool. In 'Sherlock', you should play the violin. Q: Why doesn't the sound work? A: Be sure to use the correct story files: 'Sherlock' release 26 (not release 21) or 'Lurking Horror' release 221 (not release 203). The release number is shown at the start of the game. Q: How can I send transscription to the printer? A: Type PRT: as file name. Q: Why is it impossible to save or restore? A: When your story file is stored on a floppy disk, do not remove the disk during save and restore. List of fatal errors: - "Bad stack frame" - "Byte swapped story file" - "Call to illegal address" - "Call to non-routine" [1] - "Cannot open story file" - "Division by zero" - "Error reading save file" - "Illegal attribute number" - "Illegal object number" [2] - "Jump to illegal address" - "No such property" - "Out of memory" - "Print at illegal address" - "Stack overflow" [3] - "Store out of dynamic memory" - "Story file read error" - "Text buffer overflow" - "Unknown opcode" - "Unknown Z-code version" [1] The first byte of a routine must be less than 16. [2] In V4 and above, object numbers > 2000 are considered illegal. [3] This condition is only checked on every call instruction.