Archive for the 'Gruepal' Category

DrupalZM – It is pitch black.

After fixing a dumb bitwise math bug and fixing a piece of the insert object logic (after removing an object, it wasn’t setting siblings correctly), things are looking pretty awesome. I would call the following a pretty successful test!

ZORK I: The Great Underground Empire
Copyright (c) 1981, 1982, 1983 Infocom, Inc. All rights reserved.
ZORK is a registered trademark of Infocom, Inc.
Revision 88 / Serial number 840726

West of House
You are standing in an open field west of a white house, with a boarded front door.
There is a small mailbox here.

>n
North of House
You are facing the north side of a white house. There is no door here, and all the windows are boarded up. To the north a narrow path winds through the trees.

>e
Behind House
You are behind the white house. A path leads into the forest to the east. In one corner of the house there is a small window which is slightly ajar.

>open window
With great effort, you open the window far enough to allow entry.

>go in
Kitchen
You are in the kitchen of the white house. A table seems to have been used recently for the preparation of food. A passage leads to the west and a dark staircase can be seen leading upward. A dark chimney leads down and to the east is a small window which is open.
On the table is an elongated brown sack, smelling of hot peppers.
A bottle is sitting on the table.
The glass bottle contains:
A quantity of water

>take bottle
Taken.

>w
Living Room
You are in the living room. There is a doorway to the east, a wooden door with strange gothic lettering to the west, which appears to be nailed shut, a trophy case, and a large oriental rug in the center of the room.
Above the trophy case hangs an elvish sword of great antiquity.
A battery-powered brass lantern is on the trophy case.

>take lantern
Taken.

>move rug
With a great effort, the rug is moved to one side of the room, revealing the dusty cover of a closed trap door.

>open door
Which door do you mean, the wooden door or the trap door?

>trap
The door reluctantly opens to reveal a rickety staircase descending into darkness.

>i
You are carrying:
A brass lantern
A glass bottle
The glass bottle contains:
A quantity of water

>take sword
Taken.

>d
You have moved into a dark place.
The trap door crashes shut, and you hear someone barring it.

It is pitch black. You are likely to be eaten by a grue.
Your sword is glowing with a faint blue glow.

>turn on lantern
The brass lantern is now on.

Cellar
You are in a dark and damp cellar with a narrow passageway leading north, and a crawlway to the south. On the west is the bottom of a steep metal ramp which is unclimbable.

>n
The Troll Room
This is a small room with passages to the east and south and a forbidding hole leading west. Bloodstains and deep scratches (perhaps made by an axe) mar the walls.
A nasty-looking troll, brandishing a bloody axe, blocks all passages out of the room.
Your sword has begun to glow very brightly.
The troll swings; the blade turns on your armor but crashes broadside into your head.

>kill troll with sword
You are still recovering from that last blow, so your attack is ineffective.
The troll swings his axe, but it misses.

>g
You charge, but the troll jumps nimbly aside.
The axe sweeps past as you jump aside.

>g
The troll is staggered, and drops to his knees.
The troll slowly regains his feet.

>g
The fatal blow strikes the troll square in the heart: He dies.
Almost as soon as the troll breathes his last breath, a cloud of sinister black fog envelops him, and when the fog lifts, the carcass has disappeared.
Your sword is no longer glowing.

>score
Your score is 35 (total of 350 points), in 18 moves.
This gives you the rank of Amateur Adventurer.

DrupalZM – Opening the Small Mailbox Reveals…

Even though it seems like I encounter a new set of issues at every step, things are progressing really nicely with the zmachine module. The lexical parser is done, it parses the input buffer and creates the parse table, looking up each word in the game dictionary. I had a few bugs with memory addressing and setting attributes of objects, but those are cleared up now.

I dont have any user interface to put commands into the input buffer yet, but I am able to set a “script” in the program so it will execute commands one by one, as can be seen below. This shows how much progress is done – as can be seen, it recognizes commands properly, but there are still a few bugs (notice how even though I take the leaflet and its in my inventory, its still in the mailbox as well – I’m not updating the objects 100% correctly yet). Also, if you try to move from the first room it crashes, which I think is actually related to the previously mentioned object issue. But anyway – here’s a nice transcript of how much is working so far!

ZORK I: The Great Underground Empire
Copyright (c) 1981, 1982, 1983 Infocom, Inc. All rights reserved.
ZORK is a registered trademark of Infocom, Inc.
Revision 88 / Serial number 840726

West of House
You are standing in an open field west of a white house, with a boarded front door.
There is a small mailbox here.

>open mailbox
Opening the small mailbox reveals a leaflet.

>take leaflet
Taken.

>read it
“WELCOME TO ZORK!

ZORK is a game of adventure, danger, and low cunning. In it you will explore some of the most amazing territory ever seen by mortals. No computer should be without one!”

>look
West of House
You are standing in an open field west of a white house, with a boarded front door.
There is a small mailbox here.
The small mailbox contains:
A leaflet

>i
You are carrying:
A leaflet

>jump
Are you enjoying yourself?

>jump
Wheeeeeeeeee!!!!!

>jump
Very good. Now you can go to the second grade.

>take me
How romantic!

>hello sailor
Nothing happens here.

>look at me
That’s difficult unless your eyes are prehensile.

>quit
Your score is 0 (total of 350 points), in 11 moves.
This gives you the rank of Beginner.
Do you wish to leave the game? (Y is affirmative): >
Ok.

Now to fix things up with the objects!

DrupalZM – West of House

I’m pretty excited about DrupalZM, things are going fairly smoothly. I fixed up a few major bugs with signed number calculations and the z-character -> zscii -> ascii converter. I also implemented more opcodes, as well as the output buffer that takes care of rendering text to the screen properly and in a controlled fashion. The machine now executes until it expects user input! Definitely exciting, as this means that the object table is being correctly manipulated and read (e.g. the west of house object, the cretin (the player), the mailbox, etc). Below is text from DrupalZM – the expected text for the starting room of Zork I!

ZORK I: The Great Underground Empire
Copyright (c) 1981, 1982, 1983 Infocom, Inc. All rights reserved.
ZORK is a registered trademark of Infocom, Inc.
Revision 88 / Serial number 840726

West of House
You are standing in an open field west of a white house, with a boarded front door.
There is a small mailbox here.

>

More soon!

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