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Diffstat (limited to 'src/devices/cpu/m68000/m68008.cpp')
-rw-r--r--src/devices/cpu/m68000/m68008.cpp102
1 files changed, 102 insertions, 0 deletions
diff --git a/src/devices/cpu/m68000/m68008.cpp b/src/devices/cpu/m68000/m68008.cpp
new file mode 100644
index 00000000000..7f71b048d47
--- /dev/null
+++ b/src/devices/cpu/m68000/m68008.cpp
@@ -0,0 +1,102 @@
+// license:BSD-3-Clause
+// copyright-holders:Olivier Galibert
+
+#include "emu.h"
+#include "m68008.h"
+#include "m68kdasm.h"
+
+DEFINE_DEVICE_TYPE(M68008, m68008_device, "m68008", "Motorola MC68008") // 48-pin plastic or ceramic DIP
+DEFINE_DEVICE_TYPE(M68008FN, m68008fn_device, "m68008fn", "Motorola MC68008FN") // 52-pin PLCC
+
+std::unique_ptr<util::disasm_interface> m68008_device::create_disassembler()
+{
+ return std::make_unique<m68k_disassembler>(m68k_disassembler::TYPE_68008);
+}
+
+std::unique_ptr<util::disasm_interface> m68008fn_device::create_disassembler()
+{
+ return std::make_unique<m68k_disassembler>(m68k_disassembler::TYPE_68008);
+}
+
+m68008_device::m68008_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
+ : m68008_device(mconfig, M68008, tag, owner, clock)
+{
+}
+
+m68008_device::m68008_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock)
+ : m68000_device(mconfig, type, tag, owner, clock),
+ m_mmu8(nullptr)
+{
+ m_cpu_space_config.m_addr_width = m_cpu_space_config.m_logaddr_width = 20;
+ m_program_config.m_addr_width = m_program_config.m_logaddr_width = 20;
+ m_opcodes_config.m_addr_width = m_opcodes_config.m_logaddr_width = 20;
+ m_uprogram_config.m_addr_width = m_uprogram_config.m_logaddr_width = 20;
+ m_uopcodes_config.m_addr_width = m_uopcodes_config.m_logaddr_width = 20;
+ m_cpu_space_config.m_data_width = 8;
+ m_program_config.m_data_width = 8;
+ m_opcodes_config.m_data_width = 8;
+ m_uprogram_config.m_data_width = 8;
+ m_uopcodes_config.m_data_width = 8;
+
+ m_disable_specifics = true;
+}
+
+void m68008_device::device_start()
+{
+ m68000_device::device_start();
+
+ m_s_program->specific(m_r_program8);
+ m_s_opcodes->specific(m_r_opcodes8);
+ m_s_uprogram->specific(m_r_uprogram8);
+ m_s_uopcodes->specific(m_r_uopcodes8);
+ m_s_cpu_space->specific(m_cpu_space8);
+
+ // Theoretically UB, in practice works, the alternative (putting
+ // everything in m68000_device) is annoying
+ if(m_mmu8) {
+ m_handlers_f = reinterpret_cast<const handler *>(s_handlers_if8);
+ m_handlers_p = reinterpret_cast<const handler *>(s_handlers_ip8);
+ } else {
+ m_handlers_f = reinterpret_cast<const handler *>(s_handlers_df8);
+ m_handlers_p = reinterpret_cast<const handler *>(s_handlers_dp8);
+ }
+
+}
+
+void m68008_device::update_user_super()
+{
+ if(m_sr & SR_S) {
+ m_sp = 16;
+ m_program8 = m_r_program8;
+ m_opcodes8 = m_r_opcodes8;
+ if(m_mmu8)
+ m_mmu8->set_super(true);
+ } else {
+ m_sp = 15;
+ m_program8 = m_r_uprogram8;
+ m_opcodes8 = m_r_uopcodes8;
+ if(m_mmu8)
+ m_mmu8->set_super(false);
+ }
+}
+
+
+m68008fn_device::m68008fn_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
+ : m68008_device(mconfig, M68008FN, tag, owner, clock)
+{
+ m_cpu_space_config.m_addr_width = m_cpu_space_config.m_logaddr_width = 22;
+ m_program_config.m_addr_width = m_program_config.m_logaddr_width = 22;
+ m_opcodes_config.m_addr_width = m_opcodes_config.m_logaddr_width = 22;
+ m_uprogram_config.m_addr_width = m_uprogram_config.m_logaddr_width = 22;
+ m_uopcodes_config.m_addr_width = m_uopcodes_config.m_logaddr_width = 22;
+ m_cpu_space_config.m_data_width = 8;
+ m_program_config.m_data_width = 8;
+ m_opcodes_config.m_data_width = 8;
+ m_uprogram_config.m_data_width = 8;
+ m_uopcodes_config.m_data_width = 8;
+}
+
+void m68008fn_device::device_start()
+{
+ m68008_device::device_start();
+}