// license:BSD-3-Clause // copyright-holders:AJR /*************************************************************************** DEC VAX CPUs Currently these devices are just stubs with no actual execution core. ***************************************************************************/ #include "emu.h" #include "vax.h" #include "vaxdasm.h" // device type definitions DEFINE_DEVICE_TYPE(KD32A, kd32a_device, "kd32a", "DEC KD32-A MicroVAX I CPU") DEFINE_DEVICE_TYPE(DC333, dc333_device, "dc333", "DEC DC333 MicroVAX II CPU") DEFINE_DEVICE_TYPE(DC341, dc341_device, "dc341", "DEC DC341 CVAX CPU") vax_cpu_device::vax_cpu_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock, int addrwidth) : cpu_device(mconfig, type, tag, owner, clock) , m_program_config("program", ENDIANNESS_LITTLE, 32, addrwidth, 0, 32, 9) , m_psl(0) , m_icount(0) { } kd32a_device::kd32a_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : vax_cpu_device(mconfig, KD32A, tag, owner, clock, 30) { } dc333_device::dc333_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : vax_cpu_device(mconfig, DC333, tag, owner, clock, 32) { } dc341_device::dc341_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : vax_cpu_device(mconfig, DC341, tag, owner, clock, 32) { } std::unique_ptr vax_cpu_device::create_disassembler() { return std::make_unique(); } device_memory_interface::space_config_vector vax_cpu_device::memory_space_config() const { return space_config_vector { std::make_pair(AS_PROGRAM, &m_program_config), }; } void vax_cpu_device::device_start() { address_space &space = this->space(AS_PROGRAM); space.specific(m_program_space); space.cache(m_cache); std::fill_n(&m_gpr[0], 16, 0); set_icountptr(m_icount); state_add(STATE_GENPC, "GENPC", m_gpr[15]).noshow(); state_add(STATE_GENPCBASE, "CURPC", m_gpr[15]).noshow(); for (int i = 0; i < 12; i++) state_add(VAX_R0 + i, util::string_format("R%d", i).c_str(), m_gpr[i]); state_add(VAX_AP, "AP", m_gpr[12]); state_add(VAX_FP, "FP", m_gpr[13]); state_add(VAX_SP, "SP", m_gpr[14]); state_add(VAX_PC, "PC", m_gpr[15]); state_add(VAX_PSL, "PSL", m_psl); save_item(NAME(m_gpr)); save_item(NAME(m_psl)); } void vax_cpu_device::device_reset() { m_gpr[15] = 0; m_psl = 0x041f0000; } void dc341_device::device_reset() { vax_cpu_device::device_reset(); m_gpr[15] = 0x20040000; // 0x20060000 in run mode } void vax_cpu_device::execute_run() { debugger_instruction_hook(m_gpr[15]); m_icount = 0; }