It uses 128k of PRG ROM space, requires 8k of CHR RAM, and 32k of WRAM. To put this on a cartridge would require an SXROM PCB.

Press SELECT or F1 at any time to change the color scheme. Several are included, including: Monochrome green, monochrome white, monochrome amber, and C-64 light blue text on dark blue background.

Gameplay is recommended with a Family BASIC Keyboard (Famicom accessory), but gamepad play is very usable (word picker style).

Ideal console to play with is a Famicom since the expansion port is usable and the Family BASIC Keyboard is an option; I've been able to use the Family BASIC Keyboard on my NES because I moved my NES components to a NESessity mainboard which adds many nice features while retaining all of the original hardware -- I highly recommend it for tinkerers!

Gamepad gameplay description:
You will see a word picker at the bottom of the screen. There are prefixes to show you which word category you're in:

• V (verb, including special game keywords like QUIT, RESTART, RESTORE, SAVE)
• A (adjective)
• N (noun)
• P (preposition)
• Y (yes/no/hint)
• G (Go, i.e. move in a direction)
• M (magic words, special words that you might need to enter at a critical place - these can be spoilerish, but without a keyboard this is the only way).

Use left and right on the D-pad to change categories. Once you have found your selected category, use D-pad up/down to cycle through the options.  When you've found the word you need, press the A button to select it (which copies it to the prompt). Spaces are added automatically for you.  When your command is finished building, press START to perform your newly-built command. Don't forget, you don't have to be wordy -- you can usually skip prepositions or find easy verb/noun ways to express what you want to do -- the extra prepositions and things are probably rarely needed, but I believe there are a few cases where they absolutely might be necessary.

Not for sale or commercial use.

Zork and Infocom are
(C) 2025 Microsoft / Infocom
MIT License

NES Z-Machine Interpreter
(C) 2026 Christopher Griffin
MIT License