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diff --git a/src/devices/machine/7400.h b/src/devices/machine/7400.h
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-// license:BSD-3-Clause
-// copyright-holders:Ryan Holtz
-/*****************************************************************************
-
- 7400 Quad 2-Input NAND Gate
-
-***********************************************************************
-
- Connection Diagram:
- ___ ___
- 1A 1 |* u | 14 Vcc
- 1B 2 | | 13 4B
- 1Y 3 | | 12 4A
- 2A 4 | | 11 4Y
- 2B 5 | | 10 3B
- 2Y 6 | | 9 3A
- GND 7 |_______| 8 3Y
-
- Truth Table:
- ___________
- | A | B | Y |
- |---|---|---|
- | 0 | 0 | 0 |
- | 0 | 1 | 0 |
- | 1 | 0 | 0 |
- | 1 | 1 | 1 |
- |___|___|___|
-
-**********************************************************************/
-
-#ifndef MAME_MACHINE_7400_H
-#define MAME_MACHINE_7400_H
-
-#pragma once
-
-class ttl7400_device : public device_t
-{
-public:
- // construction/destruction
- ttl7400_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0);
-
- template <std::size_t Bit> auto y_cb() { return m_y_func[Bit].bind(); }
-
- // public interfaces
- DECLARE_WRITE_LINE_MEMBER( a1_w );
- DECLARE_WRITE_LINE_MEMBER( a2_w );
- DECLARE_WRITE_LINE_MEMBER( a3_w );
- DECLARE_WRITE_LINE_MEMBER( a4_w );
- DECLARE_WRITE_LINE_MEMBER( b1_w );
- DECLARE_WRITE_LINE_MEMBER( b2_w );
- DECLARE_WRITE_LINE_MEMBER( b3_w );
- DECLARE_WRITE_LINE_MEMBER( b4_w );
-
- DECLARE_READ_LINE_MEMBER( y1_r );
- DECLARE_READ_LINE_MEMBER( y2_r );
- DECLARE_READ_LINE_MEMBER( y3_r );
- DECLARE_READ_LINE_MEMBER( y4_r );
-
-protected:
- void a_w(uint8_t line, uint8_t state);
- void b_w(uint8_t line, uint8_t state);
- uint8_t y_r(uint8_t line);
-
- // device-level overrides
- virtual void device_start() override;
- virtual void device_reset() override;
-
-private:
- void update();
-
- // callbacks
- devcb_write_line m_y_func[4];
-
- // inputs
- uint8_t m_a; // pins 1,4,9,12
- uint8_t m_b; // pins 2,5,10,13
-
- // outputs
- uint8_t m_y; // pins 3,6,8,11
-};
-
-// device type definition
-DECLARE_DEVICE_TYPE(TTL7400, ttl7400_device)
-
-#endif // MAME_MACHINE_7400_H