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.
49 lines
1.1 KiB
C++
49 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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m6507.c
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MOS Technology 6502, NMOS variant with reduced address bus
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***************************************************************************/
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#include "emu.h"
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#include "m6507.h"
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DEFINE_DEVICE_TYPE(M6507, m6507_device, "m6507", "MOS Technology M6507")
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m6507_device::m6507_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
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m6502_device(mconfig, M6507, tag, owner, clock)
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{
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program_config.m_addr_width = 13;
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sprogram_config.m_addr_width = 13;
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}
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void m6507_device::device_start()
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{
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mintf = std::make_unique<mi_6507>();
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init();
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}
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uint8_t m6507_device::mi_6507::read(uint16_t adr)
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{
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return program->read_byte(adr & 0x1fff);
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}
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uint8_t m6507_device::mi_6507::read_sync(uint16_t adr)
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{
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return scache->read_byte(adr & 0x1fff);
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}
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uint8_t m6507_device::mi_6507::read_arg(uint16_t adr)
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{
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return cache->read_byte(adr & 0x1fff);
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}
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void m6507_device::mi_6507::write(uint16_t adr, uint8_t val)
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{
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program->write_byte(adr & 0x1fff, val);
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}
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