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-rw-r--r--src/devices/cpu/vax/vax.cpp100
1 files changed, 100 insertions, 0 deletions
diff --git a/src/devices/cpu/vax/vax.cpp b/src/devices/cpu/vax/vax.cpp
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+++ b/src/devices/cpu/vax/vax.cpp
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+// 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<util::disasm_interface> vax_cpu_device::create_disassembler()
+{
+ return std::make_unique<vax_disassembler>();
+}
+
+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;
+}