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-rw-r--r--trunk/src/emu/cpu/dsp16/dsp16.c215
1 files changed, 215 insertions, 0 deletions
diff --git a/trunk/src/emu/cpu/dsp16/dsp16.c b/trunk/src/emu/cpu/dsp16/dsp16.c
new file mode 100644
index 00000000000..61c160a3366
--- /dev/null
+++ b/trunk/src/emu/cpu/dsp16/dsp16.c
@@ -0,0 +1,215 @@
+/***************************************************************************
+
+ dsp16.h
+
+ WE|AT&T DSP16 series emulator.
+
+***************************************************************************/
+
+#include "emu.h"
+#include "debugger.h"
+#include "dsp16.h"
+
+
+//**************************************************************************
+// DEVICE INTERFACE
+//**************************************************************************
+
+// device type definition
+const device_type DSP16 = &device_creator<dsp16_device>;
+
+
+//-------------------------------------------------
+// dsp16_device - constructor
+//-------------------------------------------------
+
+dsp16_device::dsp16_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : cpu_device(mconfig, DSP16, "DSP16", tag, owner, clock),
+ m_program_config("program", ENDIANNESS_LITTLE, 16, 16, -1),
+ m_pc(0),
+ m_ppc(0),
+ m_icount(0)
+{
+ // Allocate & setup
+}
+
+
+
+//-------------------------------------------------
+// device_start - start up the device
+//-------------------------------------------------
+
+void dsp16_device::device_start()
+{
+ // get our address spaces
+ m_program = space(AS_PROGRAM);
+ m_direct = &m_program->direct();
+
+ save_item(NAME(m_pc));
+
+ // register state with the debugger
+ state_add(DSP16_PC, "PC", m_pc);
+
+ // set our instruction counter
+ m_icountptr = &m_icount;
+}
+
+
+//-------------------------------------------------
+// device_reset - reset the device
+//-------------------------------------------------
+
+void dsp16_device::device_reset()
+{
+ m_pc = m_ppc = 0x0000;
+}
+
+
+//-------------------------------------------------
+// memory_space_config - return the configuration
+// of the specified address space, or NULL if
+// the space doesn't exist
+//-------------------------------------------------
+
+const address_space_config *dsp16_device::memory_space_config(address_spacenum spacenum) const
+{
+ return (spacenum == AS_PROGRAM) ? &m_program_config : NULL;
+}
+
+
+//-------------------------------------------------
+// state_import - import state into the device,
+// after it has been set
+//-------------------------------------------------
+
+void dsp16_device::state_import(const device_state_entry &entry)
+{
+
+}
+
+
+//-------------------------------------------------
+// state_string_export - export state as a string
+// for the debugger
+//-------------------------------------------------
+
+void dsp16_device::state_string_export(const device_state_entry &entry, astring &string)
+{
+ string.printf("");
+}
+
+
+//-------------------------------------------------
+// disasm_min_opcode_bytes - return the length
+// of the shortest instruction, in bytes
+//-------------------------------------------------
+
+UINT32 dsp16_device::disasm_min_opcode_bytes() const
+{
+ return 2;
+}
+
+
+//-------------------------------------------------
+// disasm_max_opcode_bytes - return the length
+// of the longest instruction, in bytes
+//-------------------------------------------------
+
+UINT32 dsp16_device::disasm_max_opcode_bytes() const
+{
+ return 4;
+}
+
+
+//-------------------------------------------------
+// disasm_disassemble - call the disassembly
+// helper function
+//-------------------------------------------------
+
+offs_t dsp16_device::disasm_disassemble(char *buffer, offs_t pc, const UINT8 *oprom, const UINT8 *opram, UINT32 options)
+{
+ extern CPU_DISASSEMBLE( dsp16 );
+ return CPU_DISASSEMBLE_NAME(dsp16)(NULL, buffer, pc, oprom, opram, 0);
+}
+
+
+
+/***************************************************************************
+ MEMORY ACCESSORS
+***************************************************************************/
+
+inline UINT32 dsp16_device::program_read(UINT32 addr)
+{
+ return m_program->read_dword(addr << 1);
+}
+
+inline void dsp16_device::program_write(UINT32 addr, UINT32 data)
+{
+ m_program->write_dword(addr << 1, data & 0xffff);
+}
+
+inline UINT32 dsp16_device::opcode_read()
+{
+ return m_direct->read_decrypted_dword(m_pc << 1);
+}
+
+
+/***************************************************************************
+ CORE EXECUTION LOOP
+***************************************************************************/
+
+//-------------------------------------------------
+// execute_min_cycles - return minimum number of
+// cycles it takes for one instruction to execute
+//-------------------------------------------------
+
+UINT32 dsp16_device::execute_min_cycles() const
+{
+ return 1;
+}
+
+
+//-------------------------------------------------
+// execute_max_cycles - return maximum number of
+// cycles it takes for one instruction to execute
+//-------------------------------------------------
+
+UINT32 dsp16_device::execute_max_cycles() const
+{
+ return 1;
+}
+
+
+//-------------------------------------------------
+// execute_input_lines - return the number of
+// input/interrupt lines
+//-------------------------------------------------
+
+UINT32 dsp16_device::execute_input_lines() const
+{
+ return 1; // TODO
+}
+
+
+void dsp16_device::execute_set_input(int inputnum, int state)
+{
+}
+
+
+void dsp16_device::execute_run()
+{
+ bool check_debugger = ((device_t::machine().debug_flags & DEBUG_FLAG_ENABLED) != 0);
+
+ do
+ {
+ // debugging
+ m_ppc = m_pc; // copy PC to previous PC
+ if (check_debugger)
+ debugger_instruction_hook(this, m_pc);
+
+ // instruction fetch
+ //UINT16 op = opcode_read();
+
+ m_icount--;
+ } while (m_icount > 0);
+}