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author Patrick Mackinlay <pmackinlay@hotmail.com>2025-01-02 12:30:59 +0700
committer Patrick Mackinlay <pmackinlay@hotmail.com>2025-01-02 12:32:32 +0700
commit2da636bb214ee65c339b385ffc3be275d06ff76e (patch)
tree02fccfdded5689b089e0f3cb711debd6cc1f1386 /src/devices/machine/ds1215.h
parentab34107f9f6487444682837e106edaed0c35c491 (diff)
ds1215: modernize and complete emulation
* rename previous ds1315 to earlier/original ds1215 device * support both ds1215 and transparent access methods * implement rtc and nvram interfaces * support updating registers
Diffstat (limited to 'src/devices/machine/ds1215.h')
-rw-r--r--src/devices/machine/ds1215.h77
1 files changed, 77 insertions, 0 deletions
diff --git a/src/devices/machine/ds1215.h b/src/devices/machine/ds1215.h
new file mode 100644
index 00000000000..ceab96f7201
--- /dev/null
+++ b/src/devices/machine/ds1215.h
@@ -0,0 +1,77 @@
+// license:BSD-3-Clause
+// copyright-holders:Patrick Mackinlay
+
+#ifndef MAME_MACHINE_DS1215_H
+#define MAME_MACHINE_DS1215_H
+
+#pragma once
+
+#include "dirtc.h"
+
+class ds1215_device_base
+ : public device_t
+ , public device_nvram_interface
+ , public device_rtc_interface
+{
+public:
+ auto ceo() { return m_ceo.bind(); }
+
+ bool ceo_r() { return !m_ceo_state; }
+
+protected:
+ ds1215_device_base(machine_config const &mconfig, device_type type, char const *tag, device_t *owner, u32 clock);
+
+ // device_t implementation
+ virtual void device_start() override ATTR_COLD;
+ virtual void device_reset() override ATTR_COLD;
+
+ // device_nvram_interface implementation
+ virtual bool nvram_read(util::read_stream &file) override;
+ virtual bool nvram_write(util::write_stream &file) override;
+ virtual void nvram_default() override;
+
+ // device_rtc_interface implementation
+ virtual bool rtc_feature_y2k() const override { return false; }
+ virtual bool rtc_feature_leap_year() const override { return true; }
+ virtual void rtc_clock_updated(int year, int month, int day, int day_of_week, int hour, int minute, int second) override;
+
+ u8 read_bit();
+ void write_bit(u8 data);
+
+private:
+ void timer(s32 param);
+ void update_ceo();
+
+ devcb_write_line m_ceo;
+ emu_timer *m_timer;
+
+ // internal state
+ u8 m_mode;
+ u8 m_count;
+ u8 m_reg[8];
+ bool m_ceo_state;
+};
+
+class ds1215_device : public ds1215_device_base
+{
+public:
+ ds1215_device(machine_config const &mconfig, char const *tag, device_t *owner, u32 clock = 32'768);
+ ~ds1215_device() {}
+
+ u8 read();
+ void write(u8 data);
+};
+
+class ds1216e_device : public ds1215_device_base
+{
+public:
+ ds1216e_device(machine_config const &mconfig, char const *tag, device_t *owner, u32 clock = 32'768);
+ ~ds1216e_device() {}
+
+ u8 read(offs_t offset);
+};
+
+DECLARE_DEVICE_TYPE(DS1215, ds1215_device)
+DECLARE_DEVICE_TYPE(DS1216E, ds1216e_device)
+
+#endif // MAME_MACHINE_DS1215_H