OP2               540 src/dps8/dps8_cpu.h #define OP2 op [1]          // 2nd descriptor (3rd ins word)
OP2              3559 src/dps8/dps8_eis.c         word18 duo = GETHI (e -> OP2);
OP2              3731 src/dps8/dps8_eis.c         word18 duo = GETHI (e -> OP2);
OP2              7665 src/dps8/dps8_eis.c                e->OP1, e->OP2);