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.

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More soon!