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(MESS) HDC9234 still WIP, added some more functions and burst mode.(nw)

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This commit is contained in:
Michael Zapf 2014-09-30 19:51:00 +00:00
parent c7d4794dac
commit bf05466963
2 changed files with 651 additions and 305 deletions
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938
src/emu/machine/hdc9234.c
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18
src/emu/machine/hdc9234.h
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@ -135,10 +135,10 @@ private:
floppy_image_device* m_floppy;
// internal register OUTPUT1
UINT8 m_output1;
UINT8 m_output1, m_output1_old;
// internal register OUTPUT2
UINT8 m_output2;
UINT8 m_output2, m_output2_old;
// Write the output registers to the latches
void auxbus_out();
@ -391,17 +391,17 @@ private:
// Are we on track 0?
bool on_track00();
// Are we using rapid steps (needed to decide to wait for seek complete)
bool rapid_steps();
// Is the currently selected drive a floppy drive?
bool using_floppy();
// Common subprograms READ ID, VERIFY, and DATA TRANSFER
void read_id(int& cont, bool implied_seek);
void read_id(int& cont, bool implied_seek, bool wait_seek_complete);
void verify(int& cont, bool verify_all);
void data_transfer(int& cont);
// Activates the step line
void step_on(bool towards00, int next);
// Clears the step line (after the pulse length time)
void step_off(int next);
// ===================================================
// Commands
// ===================================================