Speed Coin no no 1984 Stern Puzzle spdcoin spdcoin 0216 scramble 15kHz vertical (cw) yes 1 2-way horizontal 0 07 prg 0000-7FFF aud 8000-9FFF obj0 A000-BFFF obj1 C000-DFFF col E000-E01F 20210430005030