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Diffstat (limited to 'src/devices/bus/acorn/system/vdu40.h')
-rw-r--r-- | src/devices/bus/acorn/system/vdu40.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/src/devices/bus/acorn/system/vdu40.h b/src/devices/bus/acorn/system/vdu40.h new file mode 100644 index 00000000000..ff80a76d1ea --- /dev/null +++ b/src/devices/bus/acorn/system/vdu40.h @@ -0,0 +1,59 @@ +// license:BSD-3-Clause +// copyright-holders:Nigel Barnes +/********************************************************************** + + Acorn 40 Column VDU Interface + + http://chrisacorns.computinghistory.org.uk/8bit_Upgrades/Acorn_VDU.html + +**********************************************************************/ + + +#ifndef MAME_BUS_ACORN_SYSTEM_VDU40_H +#define MAME_BUS_ACORN_SYSTEM_VDU40_H + +#pragma once + +#include "bus/acorn/bus.h" +#include "video/saa5050.h" +#include "video/mc6845.h" +#include "emupal.h" +#include "screen.h" + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +class acorn_vdu40_device : + public device_t, + public device_acorn_bus_interface +{ +public: + // construction/destruction + acorn_vdu40_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); + +protected: + // device-level overrides + virtual void device_start() override; + virtual void device_reset() override; + + // optional information overrides + virtual void device_add_mconfig(machine_config &config) override; + +private: + MC6845_UPDATE_ROW(crtc_update_row); + DECLARE_WRITE_LINE_MEMBER(vsync_changed); + + required_device<screen_device> m_screen; + required_device<mc6845_device> m_crtc; + required_device<saa5050_device> m_trom; + + std::unique_ptr<uint8_t[]> m_videoram; +}; + + +// device type definition +DECLARE_DEVICE_TYPE(ACORN_VDU40, acorn_vdu40_device) + + +#endif // MAME_BUS_ACORN_SYSTEM_VDU40_H |