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// license:BSD-3-Clause
// copyright-holders:Dirk Best, Vas Crabb
/*****************************************************************************
*
* DL1416
*
* 4-Digit 16-Segment Alphanumeric Intelligent Display
* with Memory/Decoder/Driver
*
* See video/dl1416.cpp for more info
*
****************************************************************************/
#ifndef MAME_VIDEO_DL1416_H
#define MAME_VIDEO_DL1416_H
#pragma once
/***************************************************************************
DEVICE TYPES
***************************************************************************/
DECLARE_DEVICE_TYPE(DL1414T, dl1414_device)
DECLARE_DEVICE_TYPE(DL1416B, dl1416_device)
DECLARE_DEVICE_TYPE(DL1416T, dl1416_device)
/***************************************************************************
TYPE DECLARATIONS
***************************************************************************/
class dl1414_device : public device_t
{
public:
auto update() { return m_update_cb.bind(); }
// signal-level interface
virtual void wr_w(int state); // write strobe (rising edge)
void addr_w(u8 state);
void data_w(u8 state);
// bus interface - still requires cu_w to set cursor enable state
virtual void bus_w(offs_t offset, u8 data);
protected:
dl1414_device(
machine_config const &mconfig,
device_type type,
char const *tag,
device_t *owner,
u32 clock);
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
void set_cursor_state(offs_t offset, bool state);
virtual u16 translate(u8 digit, bool cursor) const = 0;
// input line state
bool m_wr_in;
u8 m_addr_in;
u8 m_data_in;
private:
devcb_write16 m_update_cb;
void do_update(offs_t offset);
// internal state
u8 m_digit_ram[4]; // holds the digit code for each position
bool m_cursor_state[4]; // holds the cursor state for each position
};
class dl1416_device : public dl1414_device
{
public:
virtual void wr_w(int state) override;
void ce_w(int state); // chip enable (active low)
void cu_w(int state); // cursor enable (active low)
protected:
dl1416_device(
machine_config const &mconfig,
device_type type,
char const *tag,
device_t *owner,
u32 clock);
// device-level overrides
virtual void device_start() override;
bool cu_in() const { return m_cu_in; }
private:
// input line state
bool m_ce_in, m_ce_latch;
bool m_cu_in;
u8 m_addr_latch;
};
#endif // MAME_VIDEO_DL1416_H
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