diff options
Diffstat (limited to 'src/devices/cpu/sm510/sm590.cpp')
-rw-r--r-- | src/devices/cpu/sm510/sm590.cpp | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/src/devices/cpu/sm510/sm590.cpp b/src/devices/cpu/sm510/sm590.cpp new file mode 100644 index 00000000000..b4cecee68cc --- /dev/null +++ b/src/devices/cpu/sm510/sm590.cpp @@ -0,0 +1,182 @@ +// license:BSD-3-Clause +// copyright-holders:hap, Jonathan Gevaryahu +/* + + Sharp SM590 MCU core implementation + + TODO: + - if BL >= 4, are port accesses mirrored or ignored? (right now assuming mirrored) + - R port mask options + +*/ + +#include "emu.h" +#include "sm590.h" +#include "sm510d.h" + + +// MCU types +DEFINE_DEVICE_TYPE(SM590, sm590_device, "sm590", "Sharp SM590") // 512x8 ROM, 32x4 RAM +DEFINE_DEVICE_TYPE(SM591, sm591_device, "sm591", "Sharp SM591") // 1kx8 ROM, 56x4 RAM +DEFINE_DEVICE_TYPE(SM595, sm595_device, "sm595", "Sharp SM595") // 768x8 ROM, 32x4 RAM + + +// internal memory maps +void sm590_device::program_512x8(address_map &map) +{ + map(0x000, 0x1ff).rom(); +} + +void sm590_device::program_768x8(address_map &map) +{ + map(0x000, 0x2ff).rom(); +} + +void sm590_device::program_1kx8(address_map &map) +{ + map(0x000, 0x3ff).rom(); +} + +void sm590_device::data_32x4(address_map &map) +{ + map(0x00, 0x1f).ram(); +} + +void sm590_device::data_56x4(address_map &map) +{ + map(0x00, 0x2f).ram(); + map(0x30, 0x37).mirror(0x08).ram(); +} + + +// device definitions +sm590_device::sm590_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock, int stack_levels, int prgwidth, address_map_constructor program, int datawidth, address_map_constructor data) : + sm510_base_device(mconfig, type, tag, owner, clock, stack_levels, prgwidth, program, datawidth, data), + m_write_rx(*this), + m_read_rx(*this, 0) +{ } + +sm590_device::sm590_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : + sm590_device(mconfig, SM590, tag, owner, clock, 4 /* stack levels */, 9 /* prg width */, address_map_constructor(FUNC(sm590_device::program_512x8), this), 5 /* data width */, address_map_constructor(FUNC(sm590_device::data_32x4), this)) +{ } + +sm591_device::sm591_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : + sm590_device(mconfig, SM591, tag, owner, clock, 4, 10, address_map_constructor(FUNC(sm591_device::program_1kx8), this), 6, address_map_constructor(FUNC(sm591_device::data_56x4), this)) +{ } + +sm595_device::sm595_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : + sm590_device(mconfig, SM595, tag, owner, clock, 4, 10, address_map_constructor(FUNC(sm595_device::program_768x8), this), 5, address_map_constructor(FUNC(sm595_device::data_32x4), this)) +{ } + + +// disasm +std::unique_ptr<util::disasm_interface> sm590_device::create_disassembler() +{ + return std::make_unique<sm590_disassembler>(); +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void sm590_device::device_start() +{ + // common init + sm510_base_device::device_start(); + + // init/register for savestates + m_pagemask = 0x7f; + save_item(NAME(m_rports)); +} + + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void sm590_device::device_reset() +{ + // common reset + sm510_base_device::device_reset(); + + // clear outputs + for (int i = 0; i < 4; i++) + port_w(i, 0); +} + + +//------------------------------------------------- +// execute +//------------------------------------------------- + +void sm590_device::execute_one() +{ + switch (m_op & 0xf0) + { + case 0x00: op_adx(); break; + case 0x10: op_tax(); break; + case 0x20: op_lblx(); break; + case 0x30: op_lax(); break; + case 0x80: case 0x90: case 0xa0: case 0xb0: + case 0xc0: case 0xd0: case 0xe0: case 0xf0: + op_t(); break; // TR + + default: + switch (m_op & 0xfc) + { + case 0x60: op_tmi(); break; // TM + case 0x64: op_tba(); break; + case 0x68: op_rm(); break; + case 0x6c: op_sm(); break; + case 0x74: op_lbmx(); break; + case 0x78: op_tl(); break; + case 0x7c: op_tls(); break; + + default: + switch (m_op) + { + case 0x40: op_lda(); break; + case 0x41: op_exc(); break; + case 0x42: op_exci(); break; + case 0x43: op_excd(); break; + case 0x44: op_coma(); break; + case 0x45: op_tam(); break; + case 0x46: op_atr(); break; + case 0x47: op_mtr(); break; + case 0x48: op_rc(); break; + case 0x49: op_sc(); break; + case 0x4a: op_str(); break; + case 0x4b: op_cend(); break; // CCTRL + case 0x4c: op_rtn0(); break; // RTN + case 0x4d: op_rtn1(); break; // RTNS + case 0x50: op_inbm(); break; + case 0x51: op_debm(); break; + case 0x52: op_incb(); break; // INBL + case 0x53: op_decb(); break; // DEBL + case 0x54: op_tc(); break; + case 0x55: op_rta(); break; + case 0x56: op_blta(); break; + case 0x57: op_exbla(); break; // XBLA + case 0x5c: op_atx(); break; + case 0x5d: op_exax(); break; + case 0x70: op_add(); break; + case 0x71: op_ads(); break; + case 0x72: op_adc(); break; + case 0x73: op_add11(); break; // ADCS + + default: op_illegal(); break; + } + break; // 0xff + + } + break; // 0xfc + + } // 0xf0 +} + +bool sm590_device::op_argument() +{ + // TL, TLS(TML) opcodes are 2 bytes + return (m_op & 0xf8) == 0x78; +} |