SEG 1905 src/dps8/dps8_iom.c p -> SEG, SEG 1941 src/dps8/dps8_iom.c p -> SEG, SEG 2396 src/dps8/dps8_iom.c p -> SEG = 1; // pat. step 45 SEG 2698 src/dps8/dps8_iom.c p -> SEG = 0; // pat. FIG. 2, step 44 SEG 186 src/dps8/dps8_iom.h word1 SEG; // pg B21