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// license:BSD-3-Clause
// copyright-holders:Juergen Buchmueller
/*****************************************************************************
*
* Xerox AltoII disk word task (KWD)
*
*****************************************************************************/
#ifdef ALTO2_DEFINE_CONSTANTS
#else // ALTO2_DEFINE_CONSTANTS
#ifndef MAME_CPU_ALTO2_A2KWD_H
#define MAME_CPU_ALTO2_A2KWD_H
//! BUS source for disk word task
enum {
bs_kwd_read_kstat = bs_task_3, //!< bus source: read disk status register
bs_kwd_read_kdata = bs_task_4 //!< bus source: read disk data register
};
//! F1 functions for disk word task
enum {
//!< f1 10: undefined
f1_kwd_strobe = f1_task_11, //!< f1 11: strobe
f1_kwd_load_kstat = f1_task_12, //!< f1 12: load kstat register
f1_kwd_increcno = f1_task_13, //!< f1 13: increment record number
f1_kwd_clrstat = f1_task_14, //!< f1 14: clear status register
f1_kwd_load_kcom = f1_task_15, //!< f1 15: load kcom register
f1_kwd_load_kadr = f1_task_16, //!< f1 16: load kadr register
f1_kwd_load_kdata = f1_task_17 //!< f1 17: load kdata register
};
//! F2 functions for disk word task
enum {
f2_kwd_init = f2_task_10, //!< f2 10: branches NEXT[5-9] on WDTASKACT && WDINIT
f2_kwd_rwc = f2_task_11, //!< f2 11: branches NEXT[8-9] on READ/WRITE/CHECK for record
f2_kwd_recno = f2_task_12, //!< f2 12: branches NEXT[8-9] on RECNO[0-1]
f2_kwd_xfrdat = f2_task_13, //!< f2 13: branches NEXT[9] on !SEEKONLY
f2_kwd_swrnrdy = f2_task_14, //!< f2 14: branches NEXT[9] on !SWRDY
f2_kwd_nfer = f2_task_15, //!< f2 15: branches NEXT[9] on !KFER
f2_kwd_strobon = f2_task_16 //!< f2 16: branches NEXT[9] on STROBE
//!< f2 17: undefined
};
void f1_early_kwd_block(); //!< F1 func: disable the disk word task
void init_kwd(int task = task_kwd); //!< initialize the disk word task
void exit_kwd(); //!< deinitialize the disk word task
void reset_kwd(); //!< reset the disk word task
#endif // MAME_CPU_ALTO2_A2KWD_H
#endif // ALTO2_DEFINE_CONSTANTS
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