Two Stop Bits | When the game Beyond Zork starts up, it asks the Z-Machine interpreter what plat...

Screwtapello 49 days ago | parent

When the game Beyond Zork starts up, it asks the Z-Machine interpreter what platform the interpreter is running on. If it's a platform that supports graphics, the game uses a custom font to draw an on-screen map; if it's a platform that only supports text, it does not try to draw the on-screen map. If it's a VT220, it uses the VT220's built-in special characters to draw the map.

Probably nobody was buying a special VT220 edition of Beyond Zork, I think that version was used by the developers working at Infocom, who did their work on a minicomputer and terminals. I believe it was a VAX, rather than a Unix minicomputer, but it wouldn't surprise me if the Unix Z-Machine interpreter had a similar story behind it.

KODust 49 days ago
Beyond Zork’s map drawing code will also produce an ASCII art variant of the map for systems that can’t easily handle the custom font, like, IIRC, the Apple II.
The Infocom dev machine was a DECSystem 20 (PDP-10 architecture) until circa 1988, when they ported tools to the 68020-based Mac II.
I expect they thought the Unix source would be a good basis for future non-Unix development; comments in the source itself allude to this possibility; I’m just wondering if it was used in any shipping product. I suspect it wasn’t.