mirror of
https://github.com/holub/mame
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93 lines
3.4 KiB
C++
93 lines
3.4 KiB
C++
/***************************************************************************
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MSM6222B
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A somewhat hd44780-compatible LCD controller.
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The -01 variant has a fixed cgrom, the other variants are mask-programmed.
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****************************************************************************
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Copyright Olivier Galibert
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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distribution.
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* Neither the name 'MAME' nor the names of its contributors may be
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used to endorse or promote products derived from this software
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without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY OLIVIER GALIBERT ''AS IS'' AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL OLIVIER GALIBERT BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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***************************************************************************/
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#ifndef __MSM6222B_H__
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#define __MSM6222B_H__
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#define MCFG_MSM6222B_ADD( _tag ) \
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MCFG_DEVICE_ADD( _tag, MSM6222B, 0 )
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#define MCFG_MSM6222B_01_ADD( _tag ) \
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MCFG_DEVICE_ADD( _tag, MSM6222B_01, 0 )
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class msm6222b_device : public device_t {
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public:
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msm6222b_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
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msm6222b_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source);
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void control_w(UINT8 data);
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UINT8 control_r();
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void data_w(UINT8 data);
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UINT8 data_r();
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// Character n bits are at bytes n*16..n*16+7 when 8-high, +10 when 11-high. Only the low 5 bits are used.
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// In one line mode n = 0..79. In two line mode first line is 0..39 and second is 40..79.
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const UINT8 *render();
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protected:
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virtual void device_start();
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private:
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UINT8 cgram[8*8];
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UINT8 ddram[80];
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UINT8 render_buf[80*16];
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bool cursor_direction, cursor_blinking, two_line, shift_on_write, double_height, cursor_on, display_on;
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UINT8 adc, shift;
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const UINT8 *cgrom;
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void cursor_step(bool direction);
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void shift_step(bool direction);
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bool blink_on() const;
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};
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class msm6222b_01_device : public msm6222b_device {
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public:
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msm6222b_01_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
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protected:
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virtual const rom_entry *device_rom_region() const;
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};
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extern const device_type MSM6222B;
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extern const device_type MSM6222B_01;
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#endif
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