void m58846_device::execute_one()
{
// handle one opcode
switch (m_op & 0x1f0)
{
case 0x30: op_sey(); break;
case 0x70: op_sp(); break;
case 0xa0: op_a(); break;
case 0xb0: op_la(); break;
case 0xc0: case 0xd0: case 0xe0: case 0xf0: op_lxy(); break;
default:
switch (m_op & 0x1fc)
{
case 0x20: op_szb(); break;
case 0x4c: op_sb(); break;
case 0x58: op_szk(); break;
case 0x5c: op_rb(); break;
case 0x60: op_xam(); break;
case 0x64: op_tam(); break;
case 0x68: op_xamd(); break;
case 0x6c: op_xami(); break;
default:
switch (m_op)
{
case 0x06: case 0x07: op_su(); break;
case 0x40: case 0x41: op_lcps(); break;
case 0x4a: case 0x4b: op_lz(); break;
case 0x54: case 0x55: op_ias(); break;
case 0x00: op_nop(); break;
case 0x01: op_ba(); break;
case 0x02: op_iny(); break;
case 0x03: op_dey(); break;
case 0x04: op_di(); break;
case 0x05: op_ei(); break;
case 0x09: op_tabe(); break; // undocumented
case 0x0a: op_am(); break;
case 0x0b: op_ose(); break;
case 0x0c: op_tya(); break;
case 0x0f: op_cma(); break;
case 0x10: op_cls(); break;
case 0x11: op_clds(); break;
case 0x13: op_cld(); break;
case 0x14: op_rd(); break;
case 0x15: op_sd(); break;
case 0x16: op_tepa(); break;
case 0x17: op_ospa(); break;
case 0x18: op_rl(); break; // undocumented
case 0x19: op_rr(); break; // undocumented
case 0x1a: op_teab(); break;
case 0x1b: op_osab(); break;
case 0x1c: op_tba(); break;
case 0x1d: op_tay(); break;
case 0x1e: op_tab(); break;
case 0x26: op_seam(); break;
case 0x2b: op_szd(); break;
case 0x2f: op_szc(); break;
case 0x43: op_amc(); break;
case 0x44: op_rt(); break;
case 0x45: op_rts(); break;
case 0x46: op_rti(); break;
case 0x48: op_rc(); break;
case 0x49: op_sc(); break;
case 0x53: op_amcs(); break;
case 0x57: op_iak(); break;
case 0x81: op_ofa(); break;
case 0x82: op_snz1(); break;
case 0x83: op_snz2(); break;
case 0x84: op_oga(); break;
case 0x85: op_t2ab(); break;
case 0x86: op_tva(); break;
case 0x8a: op_tab2(); break;
case 0x8c: op_iaf(); break;
default:
melps4_cpu_device::execute_one();
break;
}
break; // 0x1ff
}
break; // 0x1fc
} // big switch
}
void ucom4_cpu_device::execute_run()
{
while (m_icount > 0)
{
m_icount--;
// remember previous opcode
m_prev_op = m_op;
// handle interrupt - it not accepted during LI($9x) or EI($31), or while skipping
if (m_int_f && m_inte_f && (m_prev_op & 0xf0) != 0x90 && m_prev_op != 0x31 && !m_skip)
{
m_icount--;
push_stack();
m_pc = 0xf << 2;
m_int_f = 0;
m_inte_f = (m_family == NEC_UCOM43) ? 0 : 1;
standard_irq_callback(0);
}
// fetch next opcode
debugger_instruction_hook(this, m_pc);
m_op = m_program->read_byte(m_pc);
m_bitmask = 1 << (m_op & 0x03);
increment_pc();
fetch_arg();
if (m_skip)
{
m_skip = false;
m_op = 0; // nop
}
// handle opcode
switch (m_op & 0xf0)
{
case 0x80: op_ldz(); break;
case 0x90: op_li(); break;
case 0xa0: op_jmpcal(); break;
case 0xb0: op_czp(); break;
case 0xc0: case 0xd0: case 0xe0: case 0xf0: op_jcp(); break;
default:
switch (m_op)
{
case 0x00: op_nop(); break;
case 0x01: op_di(); break;
case 0x02: op_s(); break;
case 0x03: op_tit(); break;
case 0x04: op_tc(); break;
case 0x05: op_ttm(); break;
case 0x06: op_daa(); break;
case 0x07: op_tal(); break;
case 0x08: op_ad(); break;
case 0x09: op_ads(); break;
case 0x0a: op_das(); break;
case 0x0b: op_clc(); break;
case 0x0c: op_cm(); break;
case 0x0d: op_inc(); break;
case 0x0e: op_op(); break;
case 0x0f: op_dec(); break;
case 0x10: op_cma(); break;
case 0x11: op_cia(); break;
case 0x12: op_tla(); break;
case 0x13: op_ded(); break;
case 0x14: op_stm(); break;
case 0x15: op_ldi(); break;
case 0x16: op_cli(); break;
case 0x17: op_ci(); break;
case 0x18: op_exl(); break;
case 0x19: op_adc(); break;
case 0x1a: op_xc(); break;
case 0x1b: op_stc(); break;
case 0x1c: op_illegal(); break;
case 0x1d: op_inm(); break;
case 0x1e: op_ocd(); break;
case 0x1f: op_dem(); break;
case 0x30: op_rar(); break;
case 0x31: op_ei(); break;
case 0x32: op_ip(); break;
case 0x33: op_ind(); break;
case 0x40: op_ia(); break;
case 0x41: op_jpa(); break;
case 0x42: op_taz(); break;
case 0x43: op_taw(); break;
case 0x44: op_oe(); break;
case 0x45: op_illegal(); break;
case 0x46: op_tly(); break;
case 0x47: op_thx(); break;
case 0x48: op_rt(); break;
case 0x49: op_rts(); break;
case 0x4a: op_xaz(); break;
case 0x4b: op_xaw(); break;
case 0x4c: op_xls(); break;
case 0x4d: op_xhr(); break;
case 0x4e: op_xly(); break;
case 0x4f: op_xhx(); break;
default:
switch (m_op & 0xfc)
{
case 0x20: op_fbf(); break;
case 0x24: op_tab(); break;
case 0x28: op_xm(); break;
case 0x2c: op_xmd(); break;
case 0x34: op_cmb(); break;
case 0x38: op_lm(); break;
case 0x3c: op_xmi(); break;
case 0x50: op_tpb(); break;
case 0x54: op_tpa(); break;
case 0x58: op_tmb(); break;
case 0x5c: op_fbt(); break;
case 0x60: op_rpb(); break;
case 0x64: op_reb(); break;
case 0x68: op_rmb(); break;
case 0x6c: op_rfb(); break;
case 0x70: op_spb(); break;
case 0x74: op_seb(); break;
case 0x78: op_smb(); break;
case 0x7c: op_sfb(); break;
}
break; // 0xfc
}
break; // 0xff
} // big switch
}
}