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Fixed an initial setup error with seek.

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This commit is contained in:
Thomas Harte 2016-09-24 22:43:12 -04:00
parent d50629e6aa
commit 9e1d4c8b01
1 changed files with 10 additions and 3 deletions
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13
Components/1770/1770.cpp
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@ -136,6 +136,9 @@ void WD1770::process_index_hole()
{
index_hole_count_++;
posit_event(Event::IndexHole);
// motor power-down
if(index_hole_count_ == 9 && !(status_&Flag::Busy)) status_ &= ~Flag::MotorOn;
}
// +------+----------+-------------------------+
@ -172,6 +175,7 @@ void WD1770::posit_event(Event new_event_type)
wait_for_command:
printf("Idle...\n");
status_ &= ~Flag::Busy;
index_hole_count_ = 0;
WAIT_FOR_EVENT(Event::Command);
printf("Starting %02x\n", command_);
status_ |= Flag::Busy;
@ -205,9 +209,12 @@ void WD1770::posit_event(Event new_event_type)
if((command_ >> 5) == 3) step_direction_ = 0;
if((command_ >> 5) != 0) goto perform_step_command;
// This is now definitely either a seek or a restore; if it's a restore then set track to 0xff.
if(!(command_ & 0x10)) track_ = 0xff;
data_ = 0;
// This is now definitely either a seek or a restore; if it's a restore then set track to 0xff and data to 0x00.
if(!(command_ & 0x10))
{
track_ = 0xff;
data_ = 0;
}
perform_seek_or_restore_command:
if(track_ == data_) goto verify;