// license:BSD-3-Clause // copyright-holders:Olivier Galibert /*************************************************************************** m6507.c Mostek 6502, NMOS variant with reduced address bus ***************************************************************************/ #include "emu.h" #include "m6507.h" const device_type M6507 = &device_creator; m6507_device::m6507_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock) : m6502_device(mconfig, M6507, "M6507", tag, owner, clock, "m6507", __FILE__) { program_config.m_addrbus_width = 13; sprogram_config.m_addrbus_width = 13; } void m6507_device::device_start() { if(direct_disabled) mintf = new mi_6507_nd; else mintf = new mi_6507_normal; init(); } UINT8 m6507_device::mi_6507_normal::read(UINT16 adr) { return program->read_byte(adr & 0x1fff); } UINT8 m6507_device::mi_6507_normal::read_sync(UINT16 adr) { return sdirect->read_byte(adr & 0x1fff); } UINT8 m6507_device::mi_6507_normal::read_arg(UINT16 adr) { return direct->read_byte(adr & 0x1fff); } void m6507_device::mi_6507_normal::write(UINT16 adr, UINT8 val) { program->write_byte(adr & 0x1fff, val); } UINT8 m6507_device::mi_6507_nd::read_sync(UINT16 adr) { return sprogram->read_byte(adr & 0x1fff); } UINT8 m6507_device::mi_6507_nd::read_arg(UINT16 adr) { return program->read_byte(adr & 0x1fff); }