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author Nigel Barnes <Pernod70@users.noreply.github.com>2020-08-19 22:58:15 +0100
committer Nigel Barnes <Pernod70@users.noreply.github.com>2020-08-19 22:59:51 +0100
commitfc785cecbc0df66b854c9c39ba0a79c04a3b1f0b (patch)
treeda341030a1b7c5f08bde0d4e0a7b30cbc85cf242 /src/devices/bus/electron/mode7.h
parentefed2ea2c21c9ac4dec8b3682efce8d731623abb (diff)
bus/electron: Added the JAFA Mode 7 Display Unit.
Diffstat (limited to 'src/devices/bus/electron/mode7.h')
-rw-r--r--src/devices/bus/electron/mode7.h66
1 files changed, 66 insertions, 0 deletions
diff --git a/src/devices/bus/electron/mode7.h b/src/devices/bus/electron/mode7.h
new file mode 100644
index 00000000000..b3c447ee87d
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+++ b/src/devices/bus/electron/mode7.h
@@ -0,0 +1,66 @@
+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/**********************************************************************
+
+ JAFA Mode 7 Display Unit
+
+**********************************************************************/
+
+#ifndef MAME_BUS_ELECTRON_MODE7_H
+#define MAME_BUS_ELECTRON_MODE7_H
+
+#include "exp.h"
+#include "video/mc6845.h"
+#include "video/saa5050.h"
+#include "screen.h"
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+class electron_mode7_device:
+ public device_t,
+ public device_electron_expansion_interface
+{
+public:
+ static constexpr feature_type imperfect_features() { return feature::GRAPHICS; }
+
+ // construction/destruction
+ electron_mode7_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+ DECLARE_INPUT_CHANGED_MEMBER(break_button);
+
+protected:
+ // device-level overrides
+ virtual void device_start() override;
+
+ // optional information overrides
+ virtual void device_add_mconfig(machine_config &config) override;
+ virtual const tiny_rom_entry *device_rom_region() const override;
+ virtual ioport_constructor device_input_ports() const override;
+
+ virtual uint8_t expbus_r(offs_t offset) override;
+ virtual void expbus_w(offs_t offset, uint8_t data) override;
+
+private:
+ required_device<screen_device> m_screen;
+ required_device<mc6845_device> m_hd6845;
+ required_device<saa5050_device> m_trom;
+ required_device<electron_expansion_slot_device> m_exp;
+ required_memory_region m_exp_rom;
+
+ std::unique_ptr<uint8_t[]> m_videoram;
+
+ MC6845_UPDATE_ROW(crtc_update_row);
+ DECLARE_WRITE_LINE_MEMBER(vsync_changed);
+
+ uint8_t m_romsel;
+};
+
+
+// device type definition
+DECLARE_DEVICE_TYPE(ELECTRON_MODE7, electron_mode7_device)
+
+
+#endif // MAME_BUS_ELECTRON_MODE7_H