The main thing that appealed to me about this idea is that it would require a two-dimensional program counter. As I recall from the original specification, skipping through blank space is supposed to take O(1) time, but I didn't plan on implementing that. I did, however, imagine a machine with 256x256 bytes of memory, where some 80x25 (or 24?) region was reserved as directly memory-mapped to a character display (and protected at boot by surrounding it with jump instructions).
The main thing that appealed to me about this idea is that it would require a two-dimensional program counter. As I recall from the original specification, skipping through blank space is supposed to take O(1) time, but I didn't plan on implementing that. I did, however, imagine a machine with 256x256 bytes of memory, where some 80x25 (or 24?) region was reserved as directly memory-mapped to a character display (and protected at boot by surrounding it with jump instructions).