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-rw-r--r--src/devices/cpu/alto2/a2kwd.h49
1 files changed, 49 insertions, 0 deletions
diff --git a/src/devices/cpu/alto2/a2kwd.h b/src/devices/cpu/alto2/a2kwd.h
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+++ b/src/devices/cpu/alto2/a2kwd.h
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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 _A2KWD_H_
+#define _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 // _A2KWD_H_
+#endif // ALTO2_DEFINE_CONSTANTS