clk              2277 src/dps8/dps8_scu.c             uint64 clk = set_SCU_clock (cpup, scu_unit_idx) & ((1llu << 52) - 1); // 52 bits
clk              2278 src/dps8/dps8_scu.c             cpu.rQ =  clk  & 0777777777777;    // lower 36-bits of clock
clk              2279 src/dps8/dps8_scu.c             cpu.rA = (clk >> 36) & 0177777;    // upper 16-bits of clock