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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| // license:BSD-3-Clause | ||
| // copyright-holders:Juergen Buchmueller | ||
| /* | ||
| National Semiconductor NSC800 | ||
| */ | ||
|
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| #include "emu.h" | ||
| #include "nsc800.h" | ||
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| #include "z80.inc" | ||
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| #define LOG_INT (1U << 1) // z80.lst | ||
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| //#define VERBOSE (LOG_INT) | ||
| #include "logmacro.h" | ||
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| #define LOGINT(...) LOGMASKED(LOG_INT, __VA_ARGS__) | ||
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| // device type definition | ||
| DEFINE_DEVICE_TYPE(NSC800, nsc800_device, "nsc800", "National Semiconductor NSC800") | ||
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| nsc800_device::nsc800_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) | ||
| : z80_device(mconfig, NSC800, tag, owner, clock) | ||
| { | ||
| } | ||
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|
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| //------------------------------------------------- | ||
| // initialization | ||
| //------------------------------------------------- | ||
|
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| void nsc800_device::device_start() | ||
| { | ||
| z80_device::device_start(); | ||
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| save_item(NAME(m_nsc800_irq_state)); | ||
| } | ||
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| void nsc800_device::device_reset() | ||
| { | ||
| z80_device::device_reset(); | ||
| memset(m_nsc800_irq_state, 0, sizeof(m_nsc800_irq_state)); | ||
| } | ||
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| //------------------------------------------------- | ||
| // execute | ||
| //------------------------------------------------- | ||
|
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| void nsc800_device::do_op() | ||
| { | ||
| #include "cpu/z80/ncs800.hxx" | ||
| } | ||
|
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| void nsc800_device::execute_set_input(int inputnum, int state) | ||
| { | ||
| switch (inputnum) | ||
| { | ||
| case NSC800_RSTA: | ||
| m_nsc800_irq_state[0] = state; | ||
| break; | ||
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| case NSC800_RSTB: | ||
| m_nsc800_irq_state[1] = state; | ||
| break; | ||
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| case NSC800_RSTC: | ||
| m_nsc800_irq_state[2] = state; | ||
| break; | ||
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| default: | ||
| z80_device::execute_set_input(inputnum, state); | ||
| break; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,39 @@ | ||
| // license:BSD-3-Clause | ||
| // copyright-holders:Juergen Buchmueller | ||
| #ifndef MAME_CPU_Z80_NSC800_H | ||
| #define MAME_CPU_Z80_NSC800_H | ||
|
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| #pragma once | ||
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| #include "z80.h" | ||
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| enum | ||
| { | ||
| NSC800_RSTA = Z80_INPUT_LINE_MAX, | ||
| NSC800_RSTB, | ||
| NSC800_RSTC | ||
| }; | ||
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| class nsc800_device : public z80_device | ||
| { | ||
| public: | ||
| nsc800_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock); | ||
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| protected: | ||
| // device_t implementation | ||
| virtual void device_start() override ATTR_COLD; | ||
| virtual void device_reset() override ATTR_COLD; | ||
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| // device_execute_interface implementation | ||
| virtual u32 execute_input_lines() const noexcept override { return 7; } | ||
| virtual void execute_set_input(int inputnum, int state) override; | ||
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| virtual void do_op() override; | ||
| u8 m_nsc800_irq_state[3]; // state of NSC800 restart interrupts A, B, C | ||
| }; | ||
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| DECLARE_DEVICE_TYPE(NSC800, nsc800_device) | ||
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| #endif // MAME_CPU_Z80_NSC800_H |
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