mirror of
https://github.com/holub/mame
synced 2025-10-04 16:34:53 +03:00
40a75840af
Now that `direct_read_data` has been replaced with `memory_access_cache`, which is better equipped to deal with dynamic banking, there should be all the more reason to put an end to this pernicious antipattern.
43 lines
1.1 KiB
C++
43 lines
1.1 KiB
C++
// license:BSD-3-Clause
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// copyright-holders:Olivier Galibert
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/***************************************************************************
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m6504.h
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MOS Technology 6502, NMOS variant with reduced address bus
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***************************************************************************/
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#ifndef MAME_CPU_M6502_M6504_H
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#define MAME_CPU_M6502_M6504_H
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#include "m6502.h"
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class m6504_device : public m6502_device {
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public:
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m6504_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
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protected:
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class mi_6504 : public memory_interface {
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public:
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virtual ~mi_6504() {}
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virtual uint8_t read(uint16_t adr) override;
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virtual uint8_t read_sync(uint16_t adr) override;
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virtual uint8_t read_arg(uint16_t adr) override;
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virtual void write(uint16_t adr, uint8_t val) override;
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};
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virtual void device_start() override;
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};
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enum {
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M6504_IRQ_LINE = m6502_device::IRQ_LINE,
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M6504_NMI_LINE = m6502_device::NMI_LINE,
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M6504_SET_OVERFLOW = m6502_device::V_LINE
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};
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DECLARE_DEVICE_TYPE(M6504, m6504_device);
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#endif // MAME_CPU_M6502_M6504_H
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