1 /MEMOREX FD651 - FD1771 - DR8EA
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4 /FLOPPY DISC CONTROLLER AND DRIVE TEST
6 / ROBERT KRAUSE MaY 1983
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10 /------------------------------------------------------
11 /DR8EA - CONTROLLER CONNECTIONS
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31 /------------------------------------------------------
33 DBDI= 6500 /DISABLE INTERRUPT
34 DBEI= 6501 /ENABLE INTERRUPT
35 DBSK= 6502 /SKIP ON DONE FLAG
36 DBCI= 6503 /CLEAR SELECTIVE INPUT REGISTER
37 DBRI= 6504 /TRANSFER INPUT TO AC
38 DBCO= 6505 /CLEAR SELECTIVE OUTPUT REGISTER
39 DBSO= 6506 /SET SELECTIVE OUTPUT REGISTER
40 DBRO= 6507 /TRANSFER OUTPUT TO AC
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45 /------------------------------------------------------
47 QSR= 2 /STEP RATE 10MS
49 QHL= 10 /HEAD LOAD FLAG
51 QMR= 20 /MULTIPLE RECORD FLAG
53 QM1= 1 /FA USER DEFINED MARK
54 QM2= 2 /F9 USER DEFINED MARK
55 QM3= 3 /F8 DELETED DATA MARK
56 QSY= 1 /SYNCHRONIZE FLAG
57 QI0= 1 /INTERRUPT NOT READY TO READY TRANSITION
58 QI1= 2 / " READY TO NOT READY TRANSITION
59 QI2= 4 / " INDEX PULSE
62 FDRS= 000!QSR /RESTORE
65 FDSI= 120!QSR /STEP IN
66 FDSO= 160!QSR /STEP OUT
67 FDRD= 210 /READ COMMAND
68 FDWR= 250 /WRITE COMMAND
69 FDRA= 300 /READ ADDRESS
71 FDWT= 364 /WRITE TRACK
72 FDFI= 320 /FORCE INTERRUPT
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76 /FD1771 REGISTER ADDRESSES
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79 FCSR= 1400 /COMMAND STATUS REGISTER
80 FTRK= 1000 /TRACK REG.
81 FSEC= 400 /SECTOR REG.
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86 /FD1771 STATUS REGISTER BITS
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90 FSWP= 100 /WRITE PROTECT
91 FSHE= 40 /HEAD ENGAGED
94 FSNF= 20 /ID OR RECORD NOT FOUND
98 FSCP= 1 /COMMAND IN PROGRESS
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