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-rw-r--r--src/devices/cpu/ccpu/ccpu.c689
1 files changed, 689 insertions, 0 deletions
diff --git a/src/devices/cpu/ccpu/ccpu.c b/src/devices/cpu/ccpu/ccpu.c
new file mode 100644
index 00000000000..e8893580f0c
--- /dev/null
+++ b/src/devices/cpu/ccpu/ccpu.c
@@ -0,0 +1,689 @@
+// license:BSD-3-Clause
+// copyright-holders:Aaron Giles
+/***************************************************************************
+
+ ccpu.c
+ Core implementation for the portable Cinematronics CPU emulator.
+
+ Written by Aaron Giles
+ Special thanks to Zonn Moore for his detailed documentation.
+
+***************************************************************************/
+
+#include "emu.h"
+#include "debugger.h"
+#include "ccpu.h"
+
+
+const device_type CCPU = &device_creator<ccpu_cpu_device>;
+
+
+/***************************************************************************
+ MACROS
+***************************************************************************/
+
+#define READOP(a) (m_direct->read_byte(a))
+
+#define RDMEM(a) (m_data->read_word((a) * 2) & 0xfff)
+#define WRMEM(a,v) (m_data->write_word((a) * 2, (v)))
+
+#define READPORT(a) (m_io->read_byte(a))
+#define WRITEPORT(a,v) (m_io->write_byte((a), (v)))
+
+#define SET_A0 do { m_a0flag = m_A; } while (0)
+#define SET_CMP_VAL(x) do { m_cmpacc = *m_acc; m_cmpval = (x) & 0xfff; } while (0)
+#define SET_NC(a) do { m_ncflag = ~(a); } while (0)
+#define SET_MI(a) do { m_nextnextmiflag = (a); } while (0)
+
+#define TEST_A0 (m_a0flag & 1)
+#define TEST_NC ((m_ncflag >> 12) & 1)
+#define TEST_MI ((m_miflag >> 11) & 1)
+#define TEST_LT (m_cmpval < m_cmpacc)
+#define TEST_EQ (m_cmpval == m_cmpacc)
+#define TEST_DR (m_drflag != 0)
+
+#define NEXT_ACC_A do { SET_MI(*m_acc); m_acc = &m_A; } while (0)
+#define NEXT_ACC_B do { SET_MI(*m_acc); if (m_acc == &m_A) m_acc = &m_B; else m_acc = &m_A; } while (0)
+
+#define CYCLES(x) do { m_icount -= (x); } while (0)
+
+#define STANDARD_ACC_OP(resexp,cmpval) \
+do { \
+ UINT16 result = resexp; \
+ SET_A0; /* set the A0 bit based on the previous 'A' value */ \
+ SET_CMP_VAL(cmpval); /* set the compare values to the previous accumulator and the cmpval */ \
+ SET_NC(result); /* set the NC flag based on the unmasked result */ \
+ *m_acc = result & 0xfff; /* store the low 12 bits of the new value */ \
+} while (0)
+
+
+
+/***************************************************************************
+ INITIALIZATION AND SHUTDOWN
+***************************************************************************/
+
+ccpu_cpu_device::ccpu_cpu_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : cpu_device(mconfig, CCPU, "Cinematronics CPU", tag, owner, clock, "ccpu", __FILE__)
+ , m_program_config("program", ENDIANNESS_BIG, 8, 15, 0)
+ , m_data_config("data", ENDIANNESS_BIG, 16, 32, -1)
+ , m_io_config("io", ENDIANNESS_BIG, 8, 5, 0)
+ , m_external_input(*this)
+ , m_flags(0)
+{
+}
+
+
+READ8_MEMBER( ccpu_cpu_device::read_jmi )
+{
+ /* this routine is called when there is no external input */
+ /* and the JMI jumper is present */
+ return TEST_MI;
+}
+
+
+void ccpu_cpu_device::wdt_timer_trigger()
+{
+ m_waiting = FALSE;
+ m_watchdog++;
+ if (m_watchdog >= 3)
+ m_PC = 0;
+}
+
+
+void ccpu_cpu_device::device_start()
+{
+ /* copy input params */
+ m_external_input.resolve_safe(0);
+ m_vector_callback.bind_relative_to(*owner());
+ assert(!m_vector_callback.isnull());
+
+ m_program = &space(AS_PROGRAM);
+ m_direct = &m_program->direct();
+ m_data = &space(AS_DATA);
+ m_io = &space(AS_IO);
+
+ save_item(NAME(m_PC));
+ save_item(NAME(m_A));
+ save_item(NAME(m_B));
+ save_item(NAME(m_I));
+ save_item(NAME(m_J));
+ save_item(NAME(m_P));
+ save_item(NAME(m_X));
+ save_item(NAME(m_Y));
+ save_item(NAME(m_T));
+ save_item(NAME(m_a0flag));
+ save_item(NAME(m_ncflag));
+ save_item(NAME(m_cmpacc));
+ save_item(NAME(m_cmpval));
+ save_item(NAME(m_miflag));
+ save_item(NAME(m_nextmiflag));
+ save_item(NAME(m_nextnextmiflag));
+ save_item(NAME(m_drflag));
+ save_item(NAME(m_waiting));
+ save_item(NAME(m_watchdog));
+
+ // Register state for debugger
+ state_add( CCPU_PC, "PC", m_PC).formatstr("%04X");
+ state_add( CCPU_A, "A", m_A).mask(0xfff).formatstr("%03X");
+ state_add( CCPU_B, "B", m_B).mask(0xfff).formatstr("%03X");
+ state_add( CCPU_I, "I", m_I).mask(0xfff).formatstr("%03X");
+ state_add( CCPU_J, "J", m_J).mask(0xfff).formatstr("%03X");
+ state_add( CCPU_P, "P", m_P).mask(0xf).formatstr("%1X");
+ state_add( CCPU_X, "X", m_X).mask(0xfff).formatstr("%03X");
+ state_add( CCPU_Y, "Y", m_Y).mask(0xfff).formatstr("%03X");
+ state_add( CCPU_T, "T", m_T).mask(0xfff).formatstr("%03X");
+ state_add(STATE_GENPC, "curpc", m_PC).noshow();
+ state_add(STATE_GENFLAGS, "GENFLAGS", m_flags).formatstr("%6s").noshow();
+
+ m_icountptr = &m_icount;
+}
+
+
+void ccpu_cpu_device::state_string_export(const device_state_entry &entry, std::string &str)
+{
+ switch (entry.index())
+ {
+ case STATE_GENFLAGS:
+ strprintf(str, "%c%c%c%c%c%c",
+ TEST_A0 ? '0' : 'o',
+ TEST_NC ? 'N' : 'n',
+ TEST_LT ? 'L' : 'l',
+ TEST_EQ ? 'E' : 'e',
+ m_external_input() ? 'M' : 'm',
+ TEST_DR ? 'D' : 'd');
+ break;
+ }
+}
+
+
+void ccpu_cpu_device::device_reset()
+{
+ /* zero registers */
+ m_PC = 0;
+ m_A = 0;
+ m_B = 0;
+ m_I = 0;
+ m_J = 0;
+ m_P = 0;
+ m_X = 0;
+ m_Y = 0;
+ m_T = 0;
+ m_acc = &m_A;
+
+ /* zero flags */
+ m_a0flag = 0;
+ m_ncflag = 0;
+ m_cmpacc = 0;
+ m_cmpval = 1;
+ m_miflag = m_nextmiflag = m_nextnextmiflag = 0;
+ m_drflag = 0;
+
+ m_waiting = FALSE;
+ m_watchdog = 0;
+}
+
+
+
+/***************************************************************************
+ CORE EXECUTION LOOP
+***************************************************************************/
+
+void ccpu_cpu_device::execute_run()
+{
+ if (m_waiting)
+ {
+ m_icount = 0;
+ return;
+ }
+
+ do
+ {
+ UINT16 tempval;
+ UINT8 opcode;
+
+ /* update the delayed MI flag */
+ m_miflag = m_nextmiflag;
+ m_nextmiflag = m_nextnextmiflag;
+
+ /* fetch the opcode */
+ debugger_instruction_hook(this, m_PC);
+ opcode = READOP(m_PC++);
+
+ switch (opcode)
+ {
+ /* LDAI */
+ case 0x00: case 0x01: case 0x02: case 0x03:
+ case 0x04: case 0x05: case 0x06: case 0x07:
+ case 0x08: case 0x09: case 0x0a: case 0x0b:
+ case 0x0c: case 0x0d: case 0x0e: case 0x0f:
+ tempval = (opcode & 0x0f) << 8;
+ STANDARD_ACC_OP(tempval, tempval);
+ NEXT_ACC_A; CYCLES(1);
+ break;
+
+ /* INP */
+ case 0x10: case 0x11: case 0x12: case 0x13:
+ case 0x14: case 0x15: case 0x16: case 0x17:
+ case 0x18: case 0x19: case 0x1a: case 0x1b:
+ case 0x1c: case 0x1d: case 0x1e: case 0x1f:
+ if (m_acc == &m_A)
+ tempval = READPORT(opcode & 0x0f) & 1;
+ else
+ tempval = READPORT(16 + (opcode & 0x07)) & 1;
+ STANDARD_ACC_OP(tempval, tempval);
+ NEXT_ACC_A; CYCLES(1);
+ break;
+
+ /* A8I */
+ case 0x20:
+ tempval = READOP(m_PC++);
+ STANDARD_ACC_OP(*m_acc + tempval, tempval);
+ NEXT_ACC_A; CYCLES(3);
+ break;
+
+ /* A4I */
+ case 0x21: case 0x22: case 0x23:
+ case 0x24: case 0x25: case 0x26: case 0x27:
+ case 0x28: case 0x29: case 0x2a: case 0x2b:
+ case 0x2c: case 0x2d: case 0x2e: case 0x2f:
+ tempval = opcode & 0x0f;
+ STANDARD_ACC_OP(*m_acc + tempval, tempval);
+ NEXT_ACC_A; CYCLES(1);
+ break;
+
+ /* S8I */
+ case 0x30:
+ tempval = READOP(m_PC++);
+ STANDARD_ACC_OP(*m_acc + (tempval ^ 0xfff) + 1, tempval);
+ NEXT_ACC_A; CYCLES(3);
+ break;
+
+ /* S4I */
+ case 0x31: case 0x32: case 0x33:
+ case 0x34: case 0x35: case 0x36: case 0x37:
+ case 0x38: case 0x39: case 0x3a: case 0x3b:
+ case 0x3c: case 0x3d: case 0x3e: case 0x3f:
+ tempval = opcode & 0x0f;
+ STANDARD_ACC_OP(*m_acc + (tempval ^ 0xfff) + 1, tempval);
+ NEXT_ACC_A; CYCLES(1);
+ break;
+
+ /* LPAI */
+ case 0x40: case 0x41: case 0x42: case 0x43:
+ case 0x44: case 0x45: case 0x46: case 0x47:
+ case 0x48: case 0x49: case 0x4a: case 0x4b:
+ case 0x4c: case 0x4d: case 0x4e: case 0x4f:
+ tempval = READOP(m_PC++);
+ m_J = (opcode & 0x0f) + (tempval & 0xf0) + ((tempval & 0x0f) << 8);
+ NEXT_ACC_A; CYCLES(3);
+ break;
+
+ /* T4K */
+ case 0x50:
+ m_PC = (m_P << 12) + m_J;
+ NEXT_ACC_B; CYCLES(4);
+ break;
+
+ /* JMIB/JEHB */
+ case 0x51:
+ if (m_external_input()) { m_PC = ((m_PC - 1) & 0xf000) + m_J; CYCLES(2); }
+ NEXT_ACC_B; CYCLES(2);
+ break;
+
+ /* JVNB */
+ case 0x52:
+ if (TEST_DR) { m_PC = ((m_PC - 1) & 0xf000) + m_J; CYCLES(2); }
+ NEXT_ACC_B; CYCLES(2);
+ break;
+
+ /* JLTB */
+ case 0x53:
+ if (TEST_LT) { m_PC = ((m_PC - 1) & 0xf000) + m_J; CYCLES(2); }
+ NEXT_ACC_B; CYCLES(2);
+ break;
+
+ /* JEQB */
+ case 0x54:
+ if (TEST_EQ) { m_PC = ((m_PC - 1) & 0xf000) + m_J; CYCLES(2); }
+ NEXT_ACC_B; CYCLES(2);
+ break;
+
+ /* JCZB */
+ case 0x55:
+ if (TEST_NC) { m_PC = ((m_PC - 1) & 0xf000) + m_J; CYCLES(2); }
+ NEXT_ACC_B; CYCLES(2);
+ break;
+
+ /* JOSB */
+ case 0x56:
+ if (TEST_A0) { m_PC = ((m_PC - 1) & 0xf000) + m_J; CYCLES(2); }
+ NEXT_ACC_B; CYCLES(2);
+ break;
+
+ /* SSA */
+ case 0x57:
+ NEXT_ACC_B; CYCLES(2);
+ break;
+
+ /* JMP */
+ case 0x58:
+ m_PC = ((m_PC - 1) & 0xf000) + m_J;
+ NEXT_ACC_A; CYCLES(4);
+ break;
+
+ /* JMI/JEH */
+ case 0x59:
+ if (m_external_input()) { m_PC = ((m_PC - 1) & 0xf000) + m_J; CYCLES(2); }
+ NEXT_ACC_A; CYCLES(2);
+ break;
+
+ /* JVN */
+ case 0x5a:
+ if (TEST_DR) { m_PC = ((m_PC - 1) & 0xf000) + m_J; CYCLES(2); }
+ NEXT_ACC_A; CYCLES(2);
+ break;
+
+ /* JLT */
+ case 0x5b:
+ if (TEST_LT) { m_PC = ((m_PC - 1) & 0xf000) + m_J; CYCLES(2); }
+ NEXT_ACC_A; CYCLES(2);
+ break;
+
+ /* JEQ */
+ case 0x5c:
+ if (TEST_EQ) { m_PC = ((m_PC - 1) & 0xf000) + m_J; CYCLES(2); }
+ NEXT_ACC_A; CYCLES(2);
+ break;
+
+ /* JCZ */
+ case 0x5d:
+ if (TEST_NC) { m_PC = ((m_PC - 1) & 0xf000) + m_J; CYCLES(2); }
+ NEXT_ACC_A; CYCLES(2);
+ break;
+
+ /* JOS */
+ case 0x5e:
+ if (TEST_A0) { m_PC = ((m_PC - 1) & 0xf000) + m_J; CYCLES(2); }
+ NEXT_ACC_A; CYCLES(2);
+ break;
+
+ /* NOP */
+ case 0x5f:
+ NEXT_ACC_A; CYCLES(2);
+ break;
+
+ /* ADD */
+ case 0x60: case 0x61: case 0x62: case 0x63:
+ case 0x64: case 0x65: case 0x66: case 0x67:
+ case 0x68: case 0x69: case 0x6a: case 0x6b:
+ case 0x6c: case 0x6d: case 0x6e: case 0x6f:
+ m_I = (m_P << 4) + (opcode & 0x0f);
+ tempval = RDMEM(m_I);
+ STANDARD_ACC_OP(*m_acc + tempval, tempval);
+ NEXT_ACC_A; CYCLES(3);
+ break;
+
+ /* SUB */
+ case 0x70: case 0x71: case 0x72: case 0x73:
+ case 0x74: case 0x75: case 0x76: case 0x77:
+ case 0x78: case 0x79: case 0x7a: case 0x7b:
+ case 0x7c: case 0x7d: case 0x7e: case 0x7f:
+ m_I = (m_P << 4) + (opcode & 0x0f);
+ tempval = RDMEM(m_I);
+ STANDARD_ACC_OP(*m_acc + (tempval ^ 0xfff) + 1, tempval);
+ NEXT_ACC_A; CYCLES(3);
+ break;
+
+ /* SETP */
+ case 0x80: case 0x81: case 0x82: case 0x83:
+ case 0x84: case 0x85: case 0x86: case 0x87:
+ case 0x88: case 0x89: case 0x8a: case 0x8b:
+ case 0x8c: case 0x8d: case 0x8e: case 0x8f:
+ m_P = opcode & 0x0f;
+ NEXT_ACC_A; CYCLES(1);
+ break;
+
+ /* OUT */
+ case 0x90: case 0x91: case 0x92: case 0x93:
+ case 0x94: case 0x95: case 0x96: case 0x97:
+ case 0x98: case 0x99: case 0x9a: case 0x9b:
+ case 0x9c: case 0x9d: case 0x9e: case 0x9f:
+ if (m_acc == &m_A)
+ WRITEPORT(opcode & 0x07, ~*m_acc & 1);
+ NEXT_ACC_A; CYCLES(1);
+ break;
+
+ /* LDA */
+ case 0xa0: case 0xa1: case 0xa2: case 0xa3:
+ case 0xa4: case 0xa5: case 0xa6: case 0xa7:
+ case 0xa8: case 0xa9: case 0xaa: case 0xab:
+ case 0xac: case 0xad: case 0xae: case 0xaf:
+ m_I = (m_P << 4) + (opcode & 0x0f);
+ tempval = RDMEM(m_I);
+ STANDARD_ACC_OP(tempval, tempval);
+ NEXT_ACC_A; CYCLES(3);
+ break;
+
+ /* TST */
+ case 0xb0: case 0xb1: case 0xb2: case 0xb3:
+ case 0xb4: case 0xb5: case 0xb6: case 0xb7:
+ case 0xb8: case 0xb9: case 0xba: case 0xbb:
+ case 0xbc: case 0xbd: case 0xbe: case 0xbf:
+ m_I = (m_P << 4) + (opcode & 0x0f);
+ tempval = RDMEM(m_I);
+ {
+ UINT16 result = *m_acc + (tempval ^ 0xfff) + 1;
+ SET_A0;
+ SET_CMP_VAL(tempval);
+ SET_NC(result);
+ SET_MI(result);
+ }
+ NEXT_ACC_A; CYCLES(3);
+ break;
+
+ /* WS */
+ case 0xc0: case 0xc1: case 0xc2: case 0xc3:
+ case 0xc4: case 0xc5: case 0xc6: case 0xc7:
+ case 0xc8: case 0xc9: case 0xca: case 0xcb:
+ case 0xcc: case 0xcd: case 0xce: case 0xcf:
+ m_I = (m_P << 4) + (opcode & 0x0f);
+ m_I = RDMEM(m_I) & 0xff;
+ NEXT_ACC_A; CYCLES(3);
+ break;
+
+ /* STA */
+ case 0xd0: case 0xd1: case 0xd2: case 0xd3:
+ case 0xd4: case 0xd5: case 0xd6: case 0xd7:
+ case 0xd8: case 0xd9: case 0xda: case 0xdb:
+ case 0xdc: case 0xdd: case 0xde: case 0xdf:
+ m_I = (m_P << 4) + (opcode & 0x0f);
+ WRMEM(m_I, *m_acc);
+ NEXT_ACC_A; CYCLES(3);
+ break;
+
+ /* DV */
+ case 0xe0:
+ {
+ INT16 stopX = (INT16)(m_A << 4) >> 4;
+ INT16 stopY = (INT16)(m_B << 4) >> 4;
+
+ stopX = ((INT16)(stopX - m_X) >> m_T) + m_X;
+ stopY = ((INT16)(stopY - m_Y) >> m_T) + m_Y;
+
+ m_vector_callback(m_X, m_Y, stopX, stopY, m_T);
+
+ /* hack to make QB3 display semi-correctly during explosions */
+ m_A = m_X & 0xfff;
+ m_B = m_Y & 0xfff;
+ }
+ NEXT_ACC_A; CYCLES(1);
+ break;
+
+ /* LPAP */
+ case 0xe1:
+ m_J = RDMEM(m_I);
+ NEXT_ACC_A; CYCLES(3);
+ break;
+
+ /* WSP */
+ case 0xf1:
+ m_I = RDMEM(m_I) & 0xff;
+ NEXT_ACC_A; CYCLES(3);
+ break;
+
+ /* LKP */
+ case 0xe2:
+ case 0xf2:
+ tempval = READOP(((m_PC - 1) & 0xf000) + *m_acc);
+ STANDARD_ACC_OP(tempval, tempval);
+ NEXT_ACC_A; CYCLES(7);
+ m_PC++;
+ break;
+
+ /* MUL */
+ case 0xe3:
+ case 0xf3:
+ tempval = RDMEM(m_I);
+ SET_A0;
+ m_cmpval = tempval & 0xfff;
+ if (m_acc == &m_A)
+ {
+ if (m_A & 1)
+ {
+ UINT16 result;
+ m_cmpacc = m_B;
+ m_A = (m_A >> 1) | ((m_B << 11) & 0x800);
+ m_B = ((INT16)(m_B << 4) >> 5) & 0xfff;
+ result = m_B + tempval;
+ SET_NC(result);
+ SET_MI(result);
+ m_B = result & 0xfff;
+ }
+ else
+ {
+ UINT16 result;
+ m_cmpacc = m_A;
+ result = m_A + tempval;
+ m_A = (m_A >> 1) | ((m_B << 11) & 0x800);
+ m_B = ((INT16)(m_B << 4) >> 5) & 0xfff;
+ SET_NC(result);
+ SET_MI(result);
+ }
+ }
+ else
+ {
+ UINT16 result;
+ m_cmpacc = m_B;
+ m_B = ((INT16)(m_B << 4) >> 5) & 0xfff;
+ result = m_B + tempval;
+ SET_NC(result);
+ SET_MI(result);
+ if (m_A & 1)
+ m_B = result & 0xfff;
+ }
+ NEXT_ACC_A; CYCLES(2);
+ break;
+
+ /* NV */
+ case 0xe4:
+ case 0xf4:
+ m_T = 0;
+ while (((m_A & 0xa00) == 0x000 || (m_A & 0xa00) == 0xa00) &&
+ ((m_B & 0xa00) == 0x000 || (m_B & 0xa00) == 0xa00) &&
+ m_T < 16)
+ {
+ m_A = (m_A << 1) & 0xfff;
+ m_B = (m_B << 1) & 0xfff;
+ m_T++;
+ CYCLES(1);
+ }
+ NEXT_ACC_A; CYCLES(1);
+ break;
+
+ /* FRM */
+ case 0xe5:
+ case 0xf5:
+ m_waiting = TRUE;
+ NEXT_ACC_A;
+ m_icount = -1;
+
+ /* some games repeat the FRM opcode twice; it apparently does not cause
+ a second wait, so we make sure we skip any duplicate opcode at this
+ point */
+ if (READOP(m_PC) == opcode)
+ m_PC++;
+ break;
+
+ /* STAP */
+ case 0xe6:
+ case 0xf6:
+ WRMEM(m_I, *m_acc);
+ NEXT_ACC_A; CYCLES(2);
+ break;
+
+ /* CST */
+ case 0xf7:
+ m_watchdog = 0;
+ /* ADDP */
+ case 0xe7:
+ tempval = RDMEM(m_I);
+ STANDARD_ACC_OP(*m_acc + tempval, tempval);
+ NEXT_ACC_A; CYCLES(2);
+ break;
+
+ /* SUBP */
+ case 0xe8:
+ case 0xf8:
+ tempval = RDMEM(m_I);
+ STANDARD_ACC_OP(*m_acc + (tempval ^ 0xfff) + 1, tempval);
+ NEXT_ACC_A; CYCLES(3);
+ break;
+
+ /* ANDP */
+ case 0xe9:
+ case 0xf9:
+ tempval = RDMEM(m_I);
+ STANDARD_ACC_OP(*m_acc & tempval, tempval);
+ NEXT_ACC_A; CYCLES(2);
+ break;
+
+ /* LDAP */
+ case 0xea:
+ case 0xfa:
+ tempval = RDMEM(m_I);
+ STANDARD_ACC_OP(tempval, tempval);
+ NEXT_ACC_A; CYCLES(2);
+ break;
+
+ /* SHR */
+ case 0xeb:
+ case 0xfb:
+ tempval = ((m_acc == &m_A) ? (m_A >> 1) : ((INT16)(m_B << 4) >> 5)) & 0xfff;
+ tempval |= (*m_acc + (0xb0b | (opcode & 0xf0))) & 0x1000;
+ STANDARD_ACC_OP(tempval, 0xb0b | (opcode & 0xf0));
+ NEXT_ACC_A; CYCLES(1);
+ break;
+
+ /* SHL */
+ case 0xec:
+ case 0xfc:
+ tempval = (*m_acc << 1) & 0xfff;
+ tempval |= (*m_acc + (0xc0c | (opcode & 0xf0))) & 0x1000;
+ STANDARD_ACC_OP(tempval, 0xc0c | (opcode & 0xf0));
+ NEXT_ACC_A; CYCLES(1);
+ break;
+
+ /* ASR */
+ case 0xed:
+ case 0xfd:
+ tempval = ((INT16)(*m_acc << 4) >> 5) & 0xfff;
+ STANDARD_ACC_OP(tempval, 0xd0d | (opcode & 0xf0));
+ NEXT_ACC_A; CYCLES(1);
+ break;
+
+ /* SHRB */
+ case 0xee:
+ case 0xfe:
+ if (m_acc == &m_A)
+ {
+ tempval = (m_A >> 1) | ((m_B << 11) & 0x800);
+ m_B = ((INT16)(m_B << 4) >> 5) & 0xfff;
+ }
+ else
+ tempval = ((INT16)(m_B << 4) >> 5) & 0xfff;
+ tempval |= (*m_acc + (0xe0e | (opcode & 0xf0))) & 0x1000;
+ STANDARD_ACC_OP(tempval, 0xe0e | (opcode & 0xf0));
+ NEXT_ACC_A; CYCLES(1);
+ break;
+
+ /* SHLB */
+ case 0xef:
+ case 0xff:
+ if (m_acc == &m_A)
+ {
+ tempval = (m_A << 1) & 0xfff;
+ m_B = (m_B << 1) & 0xfff;
+ }
+ else
+ tempval = (m_B << 1) & 0xfff;
+ tempval |= (*m_acc + (0xf0f | (opcode & 0xf0))) & 0x1000;
+ STANDARD_ACC_OP(tempval, 0xf0f | (opcode & 0xf0));
+ NEXT_ACC_A; CYCLES(1);
+ break;
+
+ /* IV */
+ case 0xf0:
+ m_X = (INT16)(m_A << 4) >> 4;
+ m_Y = (INT16)(m_B << 4) >> 4;
+ NEXT_ACC_A; CYCLES(1);
+ break;
+ }
+ } while (m_icount > 0);
+}
+
+
+offs_t ccpu_cpu_device::disasm_disassemble(char *buffer, offs_t pc, const UINT8 *oprom, const UINT8 *opram, UINT32 options)
+{
+ extern CPU_DISASSEMBLE( ccpu );
+ return CPU_DISASSEMBLE_NAME(ccpu)(this, buffer, pc, oprom, opram, options);
+}