Thanks for this. I guess that Zarf's changes to allow zero writes in Glulxe are perhaps not complete - I will investigate when I get the chance.
Thanks. Players affected have located and old version and are using it, but it would be nice if future versions may allow playing that game.
My changes were conservative, based on the one example I was given. I didn't set the interpreter to allow all ROM writes.
Hmmm... the message shown is something like 'write to read only address (0)', so it's the same address (bug coming from Glulxa assembler converting unknown labels to value 0 without any warning), but If I recall properly your changes were applied when some specific opcode was writing to ROM, not in any case, weren't them? Maybe we've run into another opcode doing the same in this case.