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* 0520-001-H002 (O16-DPT9) DRAWING NO. 41285751-001-02 PAGE 41

03620 151727 1868 * 1869 * MOVE PEN DOWN (WITH INTERRUPT) 1870 03621 0 000000 MIDN DAC ** MOVE PEN DOWN (WITH INT) 1871 03622 14 1427 DP57 OCP PEND PEN DOWN 1872 03623 34 0127 DP58 SKS PLNB SKIP IF PLOTTER NOT BUSY 1873 03624 0 10 03714 JST INTZ 1874 03625 0 10 04176 JST ERRR ERROR ROUTINE 1875 03626 -0 01 03621 JMP* MIDN EXIT FROM SUBROUTINE 1876 03627 147302 BCI 2,NBDN PEN NOT BUSY IMMEDIATELY AFTER MOVING DOWN 03630 142316 1877 * 1878 * MOVE PEN UP (WITH INTERRUPT) 1879 03631 0 000000 MIUP DAC ** MOVE PEN UP (WITH INT) 1880 03632 14 1627 DP59 OCP PENU PEN UP 1881 03633 34 0127 DP60 SKS PLNB SKIP IF PLOTTER NOT BUSY 1882 03634 0 10 03714 JST INTZ 1883 03635 0 10 04176 JST ERRR ERROR ROUTINE 1884 03636 -0 01 03631 JMP* MIUP EXIT FROM SUBROUTINE 1885 03637 147302 BCI 2,NBUP PEN NOT BUSY IMMEDIATELY AFTER MOVING UP 03640 152720 1886 * 1887 * WAIT FOR INTERRUPT (DIRECTIONAL) 1888 03641 0 000000 INTD DAC ** WAIT FOR INTERRUPT (DIRECTIONAL) 1889 03642 0 02 04336 LDA AIED ADDRESS OF INTERRUPT ENTRY POINT 1890 03643 -0 04 04357 STA* INTL INTERRUPT LOCATION 1891 03644 0 02 01560 LDA SMKI SMK '0X20 INSTRUCTION 1892 03645 0 04 03647 STA *+2 1893 03646 0 02 04365 LDA MSKB MASK BIT FOR INTERRUPT 1894 03647 0 00 00000 *** ** PERFORM SMK '0X20 INSTRUCTION 1895 03650 000401 ENB ENABLE INTERRUPT 1896 03651 0 02 04360 LDA INTR INTERRUPT TIMER 4(4.2) MILLI-SECONDS 1897 03652 0 12 04346 DIN1 IRS CNTA INCREMENT COUNT A 1898 03653 0 01 03660 JMP DIN2 1899 03654 0 12 04347 IRS CNTB INCREMENT COUNT B [CNTB = CNTA*(2**16)] 1900 03655 0 01 03663 JMP DIN3 1901 03656 0 12 04350 IRS CNTC INCREMENT COUNT C [CNTC = CNTB*(2**16)] 1902 03657 0 01 03666 JMP DIN4 1903 03660 101000 DIN2 NOP OBEYS WHEN CNTA IS NON-ZERO 1904 03661 101000 NOP 1905 03662 101000 NOP 1906 03663 101000 DIN3 NOP OBEYS WHEN CNTB IS NON-ZERO, BUT CNTA ZERO 1907 03664 101000 NOP 1908 03665 101000 NOP 1909 03666 101000 DIN4 NOP OBEYS WHEN BOTH CNTA AND CNTB ARE ZERO 1910 03667 141206 AOA ADD ONE TO A-REGISTER 1911 03670 100040 SZE TEST FOR COMPLETION OF 4(4.2) MS 1912 03671 0 01 03652 JMP DIN1 DELAY LOOP 0F 4(4.2) MS 1913 03672 001001 INH INHIBIT INTERRUPT 1914 03673 0 10 04176 JST ERRR ERROR ROUTINE
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