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Diffstat (limited to 'src/devices/bus/centronics/digiblst.h')
-rw-r--r-- | src/devices/bus/centronics/digiblst.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/src/devices/bus/centronics/digiblst.h b/src/devices/bus/centronics/digiblst.h new file mode 100644 index 00000000000..340e5cd0f4c --- /dev/null +++ b/src/devices/bus/centronics/digiblst.h @@ -0,0 +1,60 @@ +// license:BSD-3-Clause +// copyright-holders:Barry Rodewald +/* + * digiblst.h + * + * Digiblaster - a DIY printer port DAC for the Amstrad CPC + * Printed in the German magazine CPC Amstrad International issue 8-9/1991 + * Uses Strobe (inverted on the CPC) for the 8th bit (CPCs only have 7-bit printer ports) + * + * Code borrows from the Covox Speech Thing device. + * + * Created on: 23/08/2014 + */ + +#ifndef DIGIBLST_H_ +#define DIGIBLST_H_ + +#pragma once + +#include "ctronics.h" +#include "sound/dac.h" + +// ======================> centronics_covox_device + +class centronics_digiblaster_device : public device_t, + public device_centronics_peripheral_interface +{ +public: + // construction/destruction + centronics_digiblaster_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + + // optional information overrides + virtual machine_config_constructor device_mconfig_additions() const; + +protected: + // device-level overrides + virtual void device_start(); + + virtual DECLARE_WRITE_LINE_MEMBER( input_data0 ) { if (state) m_data |= 0x01; else m_data &= ~0x01; update_dac(); } + virtual DECLARE_WRITE_LINE_MEMBER( input_data1 ) { if (state) m_data |= 0x02; else m_data &= ~0x02; update_dac(); } + virtual DECLARE_WRITE_LINE_MEMBER( input_data2 ) { if (state) m_data |= 0x04; else m_data &= ~0x04; update_dac(); } + virtual DECLARE_WRITE_LINE_MEMBER( input_data3 ) { if (state) m_data |= 0x08; else m_data &= ~0x08; update_dac(); } + virtual DECLARE_WRITE_LINE_MEMBER( input_data4 ) { if (state) m_data |= 0x10; else m_data &= ~0x10; update_dac(); } + virtual DECLARE_WRITE_LINE_MEMBER( input_data5 ) { if (state) m_data |= 0x20; else m_data &= ~0x20; update_dac(); } + virtual DECLARE_WRITE_LINE_MEMBER( input_data6 ) { if (state) m_data |= 0x40; else m_data &= ~0x40; update_dac(); } + virtual DECLARE_WRITE_LINE_MEMBER( input_strobe ) { if (state) m_data &= ~0x80; else m_data |= 0x80; update_dac(); } + +private: + required_device<dac_device> m_dac; + + void update_dac(); + + UINT8 m_data; +}; + +// device type definition +extern const device_type CENTRONICS_DIGIBLASTER; + + +#endif /* DIGIBLST_H_ */ |