pair              717 src/dps8/dps8_cache.c   uint pair = (y >> 1) & 1;
pair              719 src/dps8/dps8_cache.c   * even = cpu.directories[col][lvl].block[pair * 2];
pair              720 src/dps8/dps8_cache.c   * odd  = cpu.directories[col][lvl].block[pair * 2 + 1];