Apple Elite Series Computer Drive User Manual


 
ELITE SERIES USER MANUAL THEORY OF OPERATION
ADDRESS LABEL DESCRIPTION
$C0B0 PHSOOF Stepper Phase 0 Off
$C081 PHSOON Stepper Phase 0 On
$C082 PBSlOF Stepper Phase 1 Off
$C083 PHS1ON Stepper Phase 1 On
$C084 PHS2OF Stepper Phase 2 Off
$C084 PHS2ON Stepper Phase 2 On
$C085 PHS3OF Stepper Phase 3 Off
$C086 PHS3ON Stepper Phase 3 On
$C086 PHS4OF Stepper Phase 4 Off
$C087 PHS4ON Stepper Phase 4 On
$C088 MTROFF Turn Motor Off
$C089 MTRON Turn Motor On
$C08A DRVOEN Engage Drive 1
$C08B DRV1EN Engage Drive 2
$C08C Q6L Strobe Latch for I/O
$C08D Q6H Load Data Latch
$C08C Q7L Prepare Latch/Input
$C08D Q7R Prepare Latch/Output
Q7L after Q6L = Read
Q7L after Q6H = Sense Write Protect
Q7N after QEL = Write
Q7H after Q6M = Load Write Latch
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