Yes. The 2-address instructions could be represented 000xxxxxxxx through
100xxxxxxxx (using 000 through 100 for opcodes). The 1-address instructions could
use 1010000 through 1011111 (16), 1100000 through 1101111 (16), and 1110000
through 1111100 (13 more, for a total of 45). The 0-address instructions could use
11111100000 through 11111101111 (16), and 11111110000 through 11111111111
(16). So we have: