Last week @hkz geektrapped me into understanding how "z5" format text adventures were distributed on the Apple II. A tool, interlz5, was written some years ago. Today, the source seems to be lost. I reverse-engineered what interlz5 was doing, and wrote my own version, interl5.py. (the z got lost, sorry). And just now I blogged about it: https://emergent.unpythonic.net/01765766083

Let's hope this one doesn't get lost too.

(also just to confess, until I tried to @ them in this post I was sure hkz's handle was kHz, a fitting name for someone dabbling in old and slow computers)

#interactiveFiction #zMachine #z5

A paper on how to reuse interpreters to get inform v3/5 games on your Apple II:
https://www.kansasfest.org/wp-content/uploads/apple_ii_inform_paper.pdf

There's just a slight issue: the linked tool used to interleave v5 story files on floppy images can no longer be downloaded.
The original URL is http://3.buric.co/interlz5-001.zip, archive.org doesn't seem to have it.

Please, tell me that someone here has it...

#apple2 #infocom #inform #ZMachine

Microsoft releases Zork I, II, and III as open source

https://fed.brid.gy/r/https://nerds.xyz/2025/11/microsoft-zork-open-source/

Preserving code that shaped generations: #Zork I, II, and III go #OpenSource
#Microsoft has released the #sourcecode for Zork I, II, and III under the MIT License through a collaboration with #Xbox and #Activision that involved submitting pull requests to historical source repositories maintained by digital archivist #JasonScott. Each repository now includes the original source code and accompanying documentation.
https://opensource.microsoft.com/blog/2025/11/20/preserving-code-that-shaped-generations-zork-i-ii-and-iii-go-open-source #ZMachine

🎉✨ Advent of Code on the Z-Machine: Because there's nothing quite like using 1979 tech to solve modern #puzzles, right? 🤔 Let's all gather 'round the virtual campfire and pretend this is a groundbreaking idea instead of a nostalgic nod to ancient programming relics. 📟💾
https://entropicthoughts.com/advent-of-code-on-z-machine #AdventOfCode #ZMachine #RetroGaming #Nostalgia #ProgrammingTech #HackerNews #ngated

Advent of Code on the Z-Machine

https://entropicthoughts.com/advent-of-code-on-z-machine

#HackerNews #AdventOfCode #ZMachine #RetroGaming #CodingChallenge #GameDev

Fun fact: Did you know you can play "Zork" & any number of classic Infocom games using #Microsoft #Copilot as a z-emulator? Visit https://copilot.microsoft.com & use the prompt:

"You are an Infocom z-machine emulator. You will emulate the text adventure game Zork, responding to commands just as a z-machine emulator would while I am the player."

(Also works for Planetfall, Suspended, Deadline, etc.)

#ai #infocom #zmachine #xyzzy

New post: Road to Bloodstock: Z Machine https://www.moshville.co.uk/interview/2025/07/road-to-bloodstock-z-machine/ #Bloodstock #ZMachine

The Grundy #NewBrain was an interesting #z80 based machine from 1982. One of its more remarkable features was a built-in single line display in addition to the video out, allowing for some portable use. The machine was targeted at business use and didn't get a large amount of platform specific software. It ran a version of #CP/M 2.2 with an efficient implementation giving it a large TPA. The platform also supports inverse characters, although without a specific control code to toggle so I need to manually track reverse character mode and toggle the top bit accordingly. With some gymnastics in memory management, a 50Hz timer is available, allowing me to count the ticks for the 10Hz timer expected by a full featured #Zmachine
Now that it's properly tested and running, you can download the latest addition to the #Vezza family from https://gitlab.com/sijnstra1/vezza and if you are curious about the NewBrain you can get the emulator and other info from https://newbrainemu.eu/new/

I've attached screenshots of the Bomber game in action, as well as the #Infocom classic A Mind Forever Voyaging.

While porting #Vezza for another #z80 platform (the Grundy #NewBrain), I noticed that there was an issue with the timer routine for the #MSX version. It turns out that the code was in there for the MSX version was using the MSX clock, however, it was not calculating the time properly, The MSX has a fine-grained timer which allows me to measure the time to the nearest 0.1 second as required for the #Zmachine standard. This makes the MSX version one of the few that I have written which supports the full fine-grained time requirement.

While for normal text adventures, this timer resolution might not make much difference, some of the fun post-#Infocom games, this distinction is used. One of the games that I've tested which works properly now is the `bomber.z5`, a real time game where you need to drop bombs from the plane to create a flat landing for your plane. Check the screenshot below for the action! Download the latest from https://sijnstra.itch.io/vezza
#retrogaming #retrocomputing

Seit ich weniger Zeit im Internet verbringe (oder sagen wir mal, weniger im "Surface Web" und mehr in den Katakomben darunter) habe ich deutlich mehr geistigen Freiraum und "verschwende" deutlich weniger Zeit mit sinnlosem Medienkonsum...

... allerdings buddele ich mich auch immer wieder extrem tief in diverse Kaninchenbaue hinein, derzeit ganz besonders in das gigantische Paralleluniversum der Z-Machine. Für die uneingeweihten: Das ist der VM Unterbau unter #zork

Mal schauen was daraus wird, jedenfalls lese ich gerade

"Learning ZIL
- or -
Everything You Always Wanted to Know
About Writing Interactive Fiction
But Couldn't Find Anyone Still Working Here to Ask"

https://archive.org/details/Learning_ZIL_Steven_Eric_Meretzky_1995

Am Wochenende, wenn Junior es zulässt werde ich mal anfangen ein wenig damit herumzuexperimentieren...

#zmachine

Back to fun platforms to port my #Vezza #Infocom #Zmachine interpreter - this time it's the Enterprise 128. A 4MHz #z80 machine from the mid 80s, it has a great emulator, and a bespoke DOS known as IS-DOS, with a lot of compatibility with both CP/M 2.2 and #MSXDOS. While it needed quite some tweaking, a lot of the heavy lifting was done with my original #MSX version before it was optimised. As I understand, the #Enterprise128 didn't have a great library of games for it, so hoping this helps! Get it while it's hot at https://gitlab.com/sijnstra1/vezza Screenshots are the IS-DOS 1.0 version running Border Zone, and the IS-DOS 1.1a version running Beyond #Zork.

Another wet weekend, another #Vezza release! I was asked to adapt my #Infocom interpreter to another platform - this time the #SinclarQL. An interesting request as it uses a #Motorola 68008 CPU, however, it does have the ability to emulate a #z80 on #CP/M. I was given some pointers on which versions worked to some extent, along with some documentation. Fast forward a few days and I had adapted one of the VT52 versions crossed with other features, and now #Sinclair QL users can enjoy in CP/M mode their #Inform #ZMachine adventures. Yes, there's a native terp as well, however, this was only a few days worth of massaging to get it to work on the SUCCESS CP/M Emulator - the proof is in the screen shots. You can download the executable here https://gitlab.com/sijnstra1/vezza/ #retrocomputing #retrogaming

Shapes

https://macintoshgarden.org/games/shapes

A surreal puzzle text adventure.

#macgarden #interactivefiction #2006 #text #dgware #radicalal #zmachine

Kingdom of Amphibia: The Shipwreck

https://macintoshgarden.org/games/kingdom-of-amphibia-the-shipwreck

You play a sailor on the USS Intrepid that travels to explore a distant land.

#macgarden #interactivefiction #2001 #text #dgware #radicalal #agt #zmachine

LASH -- Local Asynchronous Satellite Hookup

https://macintoshgarden.org/games/lash-local-asynchronous-satellite-hookup

In this historical drama and treasure hunt set in 2062, you have rented a robot called a MULE that you can control remotely to salvage artifacts from an abandoned irradiated plantation near Macon,

#macgarden #interactivefiction #2000 #text #paulobrian #scifi #zmachine

Chicks Dig Jerks

https://macintoshgarden.org/games/chicks-dig-jerks

An ancient evil threatens to invade a decadent mountain town, yet all that concerns young grave robber Avandre Varick is hitting on gorgeous babes.

#macgarden #interactivefiction #1999 #text #robbsherwin #zmachine

The Path to Fortune

https://macintoshgarden.org/games/the-path-fortune

You have been volunteered by your master for a quest to save the small city of Windhall from a terrible fate.

#macgarden #interactivefiction #1996 #text #ceforman #jeffcassidy #zmachine

Resurrecting Infocom's Unix Z-Machine with Cosmopolitan

https://christopherdrum.github.io/posts/2025/04/porting-infocom-with-cosmo

#HackerNews #ResurrectingInfocom #Unix #ZMachine #Cosmopolitan #RetroGaming #TechHistory

The Frenetic Five vs. Sturm und Drang

https://macintoshgarden.org/games/the-frenetic-five-vs-sturm-und-drang

The madcap superhero adventure that would have won the 1997 Interactive Fiction Competition, except for the 12 other games that finished ahead of it. It did walk away with a Xyzzy Award for Best NPCs,

#macgarden #interactivefiction #1998 #text #neildemause #zmachine