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-rw-r--r--src/devices/cpu/sm510/sm510.cpp165
1 files changed, 165 insertions, 0 deletions
diff --git a/src/devices/cpu/sm510/sm510.cpp b/src/devices/cpu/sm510/sm510.cpp
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+++ b/src/devices/cpu/sm510/sm510.cpp
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+// license:BSD-3-Clause
+// copyright-holders:hap
+/*
+
+ Sharp SM510 MCU core implementation
+
+*/
+
+#include "emu.h"
+#include "sm510.h"
+#include "sm510d.h"
+
+
+// MCU types
+DEFINE_DEVICE_TYPE(SM510, sm510_device, "sm510", "Sharp SM510") // 2.7Kx8 ROM, 128x4 RAM(32x4 for LCD)
+
+
+// internal memory maps
+void sm510_device::program_2_7k(address_map &map)
+{
+ map(0x0000, 0x02bf).rom();
+ map(0x0400, 0x06bf).rom();
+ map(0x0800, 0x0abf).rom();
+ map(0x0c00, 0x0ebf).rom();
+}
+
+void sm510_device::data_96_32x4(address_map &map)
+{
+ map(0x00, 0x5f).ram();
+ map(0x60, 0x6f).ram().share("lcd_ram_a");
+ map(0x70, 0x7f).ram().share("lcd_ram_b");
+}
+
+
+// device definitions
+sm510_device::sm510_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) :
+ sm510_base_device(mconfig, SM510, tag, owner, clock, 2 /* stack levels */, 12 /* prg width */, address_map_constructor(FUNC(sm510_device::program_2_7k), this), 7 /* data width */, address_map_constructor(FUNC(sm510_device::data_96_32x4), this))
+{ }
+
+
+// disasm
+std::unique_ptr<util::disasm_interface> sm510_device::create_disassembler()
+{
+ return std::make_unique<sm510_disassembler>();
+}
+
+
+//-------------------------------------------------
+// buzzer controller
+//-------------------------------------------------
+
+void sm510_device::clock_melody()
+{
+ u8 out = 0;
+
+ if (m_r_mask_option == RMASK_DIRECT)
+ {
+ // direct output
+ out = m_r & 3;
+ }
+ else
+ {
+ // from divider, R2 inverse phase
+ out = m_div >> m_r_mask_option & 1;
+ out |= (out << 1 ^ 2);
+ out &= m_r;
+ }
+
+ // output to R pins
+ if (out != m_r_out)
+ {
+ m_write_r(out);
+ m_r_out = out;
+ }
+}
+
+
+//-------------------------------------------------
+// execute
+//-------------------------------------------------
+
+void sm510_device::execute_one()
+{
+ switch (m_op & 0xf0)
+ {
+ case 0x20: op_lax(); break;
+ case 0x30: op_adx(); break;
+ case 0x40: op_lb(); break;
+
+ case 0x80: case 0x90: case 0xa0: case 0xb0:
+ op_t(); break;
+ case 0xc0: case 0xd0: case 0xe0: case 0xf0:
+ op_tm(); break;
+
+ default:
+ switch (m_op & 0xfc)
+ {
+ case 0x04: op_rm(); break;
+ case 0x0c: op_sm(); break;
+ case 0x10: op_exc(); break;
+ case 0x14: op_exci(); break;
+ case 0x18: op_lda(); break;
+ case 0x1c: op_excd(); break;
+ case 0x54: op_tmi(); break;
+ case 0x70: case 0x74: case 0x78: op_tl(); break;
+ case 0x7c: op_tml(); break;
+
+ default:
+ switch (m_op)
+ {
+ case 0x00: op_skip(); break;
+ case 0x01: op_atbp(); break;
+ case 0x02: op_sbm(); break;
+ case 0x03: op_atpl(); break;
+ case 0x08: op_add(); break;
+ case 0x09: op_add11(); break;
+ case 0x0a: op_coma(); break;
+ case 0x0b: op_exbla(); break;
+
+ case 0x51: op_tb(); break;
+ case 0x52: op_tc(); break;
+ case 0x53: op_tam(); break;
+ case 0x58: op_tis(); break;
+ case 0x59: op_atl(); break;
+ case 0x5a: op_ta0(); break;
+ case 0x5b: op_tabl(); break;
+ case 0x5d: op_cend(); break;
+ case 0x5e: op_tal(); break;
+ case 0x5f: op_lbl(); break;
+
+ case 0x60: op_atfc(); break;
+ case 0x61: op_atr(); break;
+ case 0x62: op_wr(); break;
+ case 0x63: op_ws(); break;
+ case 0x64: op_incb(); break;
+ case 0x65: op_idiv(); break;
+ case 0x66: op_rc(); break;
+ case 0x67: op_sc(); break;
+ case 0x68: op_tf1(); break;
+ case 0x69: op_tf4(); break;
+ case 0x6a: op_kta(); break;
+ case 0x6b: op_rot(); break;
+ case 0x6c: op_decb(); break;
+ case 0x6d: op_bdc(); break;
+ case 0x6e: op_rtn0(); break;
+ case 0x6f: op_rtn1(); break;
+
+ default: op_illegal(); break;
+ }
+ break; // 0xff
+
+ }
+ break; // 0xfc
+
+ } // big switch
+
+ // BM high bit is only valid for 1 step
+ m_bmask = (m_op == 0x02) ? 0x40 : 0;
+}
+
+bool sm510_device::op_argument()
+{
+ // LBL, TL, TML opcodes are 2 bytes
+ return m_op == 0x5f || (m_op & 0xf0) == 0x70;
+}