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// license:BSD-3-Clause
// copyright-holders:Olivier Galibert
/***************************************************************************
m4510.cpp
65ce02 with a mmu and a cia integrated
differences between the standard 65ce02 and this CPU:
http://www.zimmers.net/anonftp/pub/cbm/c65/65ce02.txt
***************************************************************************/
#include "emu.h"
#include "m4510.h"
#include "m4510d.h"
DEFINE_DEVICE_TYPE(M4510, m4510_device, "m4510", "CSG 4510")
m4510_device::m4510_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
m65ce02_device(mconfig, M4510, tag, owner, clock),
map_enable(0),
nomap(false)
{
program_config.m_addr_width = 20;
program_config.m_logaddr_width = 16;
program_config.m_page_shift = 13;
sprogram_config.m_addr_width = 20;
sprogram_config.m_logaddr_width = 16;
sprogram_config.m_page_shift = 13;
}
std::unique_ptr<util::disasm_interface> m4510_device::create_disassembler()
{
return std::make_unique<m4510_disassembler>();
}
void m4510_device::device_start()
{
mintf = std::make_unique<mi_4510>(this);
m65ce02_device::init();
save_item(NAME(map_offset));
save_item(NAME(map_enable));
}
void m4510_device::device_reset()
{
map_offset[0] = map_offset[1] = 0;
map_enable = 0;
nomap = true;
// Wild guess, this setting makes the cpu start executing some code in the c65 driver
//map_offset[1] = 0x2e000;
//map_enable = 0x80;
m65ce02_device::device_reset();
}
bool m4510_device::memory_translate(int spacenum, int intention, offs_t &address)
{
if (spacenum == AS_PROGRAM)
{
address = map(address);
}
return true;
}
m4510_device::mi_4510::mi_4510(m4510_device *_base)
{
base = _base;
}
uint8_t m4510_device::mi_4510::read(uint16_t adr)
{
return program.read_byte(base->map(adr));
}
uint8_t m4510_device::mi_4510::read_sync(uint16_t adr)
{
return csprogram.read_byte(base->map(adr));
}
uint8_t m4510_device::mi_4510::read_arg(uint16_t adr)
{
return cprogram.read_byte(base->map(adr));
}
void m4510_device::mi_4510::write(uint16_t adr, uint8_t val)
{
program.write_byte(base->map(adr), val);
}
#include "cpu/m6502/m4510.hxx"
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