// license:BSD-3-Clause // copyright-holders:AJR /********************************************************************** Sitronix ST2202 8-Bit Integrated Microcontroller Sitronix ST2204 8-Bit Integrated Microcontroller Functional blocks: * Interrupt controller (11 levels excluding BRK and RESET) * GPIO (6 ports, 8 bits each) * External bus (up to 7 CS outputs, 48M maximum addressable) * Timers/event counters with clocking outputs (2 plus base timer) * Programmable sound generator (2 channels plus DAC) * LCD controller (ST2202: 240x120 B/W, software gray levels) (ST2204: 320x240 B/W or 240x160 4-gray) * Serial peripheral interface * UART (built-in BRG; RS-232 and IrDA modes) * Direct memory access (1 channel) * Power down modes (WAI-0, WAI-1, STP) * Watchdog timer * Low voltage detector * 256K (ST2202) or 512K (ST2204) ROM (may be disabled) * 4K (ST2202) or 10K (ST2204) RAM Emulation is largely based on documentation for the ST2202. The ST2204 is believed to be almost entirely backward compatible. Two versions of the ST2204 were manufactured: ST2204A, fabricated by TSMC, and ST2204B, fabricated by Hyundai. A PDF document describing the differences between these two was once available. Reverse-engineered documentation for ST2204's internal registers: http://blog.kevtris.org/blogfiles/Game%20King%20Inside.txt **********************************************************************/ #include "emu.h" #include "st2204.h" DEFINE_DEVICE_TYPE(ST2202, st2202_device, "st2202", "Sitronix ST2202 Integrated Microcontroller") DEFINE_DEVICE_TYPE(ST2204, st2204_device, "st2204", "Sitronix ST2204 Integrated Microcontroller") st2204_device::st2204_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock, address_map_constructor map) : st2xxx_device(mconfig, type, tag, owner, clock, map, 26, false) // logical; only 23 address lines are brought out , m_dac_callback(*this) , m_tmode{0} , m_tcntr{0} , m_tload{0} , m_timer{0} , m_psg{0} , m_psgc(0) , m_vol(0) , m_dac(0) , m_psg_timer(nullptr) , m_dms(0) , m_dmd(0) , m_dcnth(0) { } st2204_device::st2204_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : st2204_device(mconfig, ST2204, tag, owner, clock, address_map_constructor(FUNC(st2204_device::int_map), this)) { } st2202_device::st2202_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : st2204_device(mconfig, ST2202, tag, owner, clock, address_map_constructor(FUNC(st2202_device::int_map), this)) { } void st2204_device::device_resolve_objects() { st2xxx_device::device_resolve_objects(); m_dac_callback.resolve_safe(); } void st2204_device::device_start() { std::unique_ptr intf = std::make_unique(); space(AS_DATA).cache(intf->dcache); space(AS_DATA).specific(intf->data); intf->irr_enable = false; intf->irr = 0; intf->prr = 0; intf->drr = 0; intf->dmr = 0; intf->irq_service = false; init_base_timer(0x0020); init_lcd_timer(0x0040); m_timer[0] = timer_alloc(FUNC(st2204_device::t0_interrupt), this); m_timer[1] = timer_alloc(FUNC(st2204_device::t1_interrupt), this); m_psg_timer = timer_alloc(FUNC(st2204_device::psg_interrupt), this); save_item(NAME(m_tmode)); save_item(NAME(m_tcntr)); save_item(NAME(m_tload)); save_item(NAME(m_psg)); save_item(NAME(m_psgc)); save_item(NAME(m_vol)); save_item(NAME(m_dac)); save_item(NAME(m_dms)); save_item(NAME(m_dmd)); save_item(NAME(m_dcnth)); save_item(NAME(intf->dmr)); mintf = std::move(intf); save_common_registers(); init(); state_add(ST_IRR, "IRR", downcast(*mintf).irr).mask(0xff); state_add(ST_PRR, "PRR", downcast(*mintf).prr).mask(0xfff); state_add(ST_DRR, "DRR", downcast(*mintf).drr).mask(0x7ff); state_add(ST_IREQ, "IREQ", m_ireq, [this](u16 data) { m_ireq = data; update_irq_state(); }).mask(st2xxx_ireq_mask()); state_add(ST_IENA, "IENA", m_iena, [this](u16 data) { m_iena = data; update_irq_state(); }).mask(st2xxx_ireq_mask()); for (int i = 0; i < 5; i++) { state_add(ST_PAOUT + i, string_format("P%cOUT", 'A' + i).c_str(), m_pdata[i]); state_add(ST_PCA + i, string_format("PC%c", 'A' + i).c_str(), m_pctrl[i]); if (i == 2) state_add(ST_PSA + i, string_format("PS%c", 'A' + i).c_str(), m_psel[i]); if (i == 2 || i == 3) state_add(ST_PFC + i - 2, string_format("PF%c", 'A' + i).c_str(), m_pfun[i - 2]); } state_add(ST_PLOUT, "PLOUT", m_pdata[6]); state_add(ST_PCL, "PCL", m_pctrl[6]); state_add(ST_PMCR, "PMCR", m_pmcr); state_add(ST_PRS, "PRS", m_prs, [this](u8 data) { prs_w(data); }).mask(0x60); state_add(ST_BTEN, "BTEN", m_bten, [this](u8 data) { bten_w(data); }).mask(0x1f); state_add(ST_BTSR, "BTSR", m_btsr).mask(0x1f); state_add(ST_T0M, "T0M", m_tmode[0]).mask(0x37); state_add(ST_T0C, "T0C", m_tload[0]); state_add(ST_T1M, "T1M", m_tmode[1]).mask(0x1f); state_add(ST_T1C, "T1C", m_tload[1]); state_add(ST_PSG0, "PSG0", m_psg[0]).mask(0xfff); state_add(ST_PSG1, "PSG1", m_psg[1]).mask(0xfff); state_add(ST_PSGC, "PSGC", m_psgc).mask(0x7f); state_add(ST_VOL, "VOL", m_vol); state_add(ST_DAC, "DAC", m_dac); state_add(ST_SYS, "SYS", m_sys, [this](u8 data) { sys_w(data); }); state_add(ST_MISC, "MISC", m_misc).mask(st2xxx_misc_mask()); state_add(ST_LSSA, "LSSA", m_lssa); state_add(ST_LVPW, "LVPW", m_lvpw); state_add(ST_LXMAX, "LXMAX", m_lxmax); state_add(ST_LYMAX, "LYMAX", m_lymax); state_add(ST_LPAN, "LPAN", m_lpan).mask(st2xxx_lpan_mask()); state_add(ST_LCTR, "LCTR", m_lctr).mask(st2xxx_lctr_mask()); state_add(ST_LCKR, "LCKR", m_lckr).mask(st2xxx_lckr_mask()); state_add(ST_LFRA, "LFRA", m_lfra).mask(0x3f); state_add(ST_LAC, "LAC", m_lac).mask(0x1f); state_add(ST_LPWM, "LPWM", m_lpwm).mask(st2xxx_lpwm_mask()); state_add(ST_SCTR, "SCTR", m_sctr); state_add(ST_SCKR, "SCKR", m_sckr).mask(0x7f); state_add(ST_SSR, "SSR", m_ssr).mask(0x77); state_add(ST_UCTR, "UCTR", m_uctr).mask(st2xxx_uctr_mask()); state_add(ST_USR, "USTR", m_usr).mask(0x7f); state_add(ST_IRCTR, "IRCTR", m_irctr).mask(0xc7); state_add(ST_BCTR, "BCTR", m_bctr).mask(0x87); state_add(ST_BRS, "BRS", m_brs); state_add(ST_BDIV, "BDIV", m_bdiv); state_add(ST_DMS, "DMS", m_dms); state_add(ST_DMR, "DMR", downcast(*mintf).dmr).mask(0x7ff); state_add(ST_DMD, "DMD", m_dmd); } void st2204_device::device_reset() { st2xxx_device::device_reset(); m_tmode[0] = m_tmode[1] = 0; m_tcntr[0] = m_tcntr[1] = 0; m_tload[0] = m_tload[1] = 0; m_timer[0]->adjust(attotime::never); m_timer[1]->adjust(attotime::never); m_psg[0] = m_psg[1] = 0; m_psgc = 0; m_vol = 0; m_dac = 0; m_psg_timer->enable(false); m_dac_callback(0); downcast(*mintf).dmr = 0; // other DMA registers are undefined } const char *st2204_device::st2xxx_irq_name(int i) const { switch (i) { case 0: return "PC0 edge"; case 1: return "DAC reload"; case 2: return "Timer 0"; case 3: return "Timer 1"; case 4: return "PA transition"; case 5: return "Base timer"; case 6: return "LCD frame"; case 8: return "SPI TX empty"; case 9: return "SPI RX ready"; case 10: return "UART TX"; case 11: return "UART RX"; default: return "Reserved"; } } u8 st2204_device::mi_st2204::pread(u16 adr) { u16 bank = irq_service && irr_enable ? irr : prr; return data.read_byte(u32(bank ^ 1) << 14 | (adr & 0x3fff)); } u8 st2204_device::mi_st2204::preadc(u16 adr) { u16 bank = irq_service && irr_enable ? irr : prr; return dcache.read_byte(u32(bank ^ 1) << 14 | (adr & 0x3fff)); } void st2204_device::mi_st2204::pwrite(u16 adr, u8 val) { u16 bank = irq_service && irr_enable ? irr : prr; data.write_byte(u32(bank ^ 1) << 14 | (adr & 0x3fff), val); } u8 st2204_device::mi_st2204::dread(u16 adr) { return data.read_byte(u32(drr) << 15 | (adr & 0x7fff)); } u8 st2204_device::mi_st2204::dreadc(u16 adr) { return dcache.read_byte(u32(drr) << 15 | (adr & 0x7fff)); } void st2204_device::mi_st2204::dwrite(u16 adr, u8 val) { data.write_byte(u32(drr) << 15 | (adr & 0x7fff), val); } u8 st2204_device::mi_st2204::read(u16 adr) { return program.read_byte(adr); } u8 st2204_device::mi_st2204::read_sync(u16 adr) { return BIT(adr, 15) ? dreadc(adr) : BIT(adr, 14) ? preadc(adr) : cprogram.read_byte(adr); } u8 st2204_device::mi_st2204::read_arg(u16 adr) { return BIT(adr, 15) ? dreadc(adr) : BIT(adr, 14) ? preadc(adr) : cprogram.read_byte(adr); } u8 st2204_device::mi_st2204::read_dma(u16 adr) { if (BIT(adr, 15)) return dcache.read_byte(u32(dmr) << 15 | (adr & 0x7fff)); else return read(adr); } u8 st2204_device::mi_st2204::read_vector(u16 adr) { return pread(adr); } void st2204_device::mi_st2204::write(u16 adr, u8 val) { program.write_byte(adr, val); } unsigned st2204_device::st2xxx_bt_divider(int n) const { // 2 Hz, 8 Hz, 64 Hz, 256 Hz, 2048 Hz if (n < 5) return 16384 >> ((n & 1) * 2 + (n >> 1) * 5); else return 0; } u32 st2204_device::tclk_pres_div(u8 mode) const { assert(mode < 8); if (mode == 0) return 0x10000; else if (mode < 4) return 0x20000 >> (mode * 2); else if (mode == 4) return 0x100; else return 0x8000 >> (mode * 2); } TIMER_CALLBACK_MEMBER(st2204_device::t0_interrupt) { m_ireq |= 0x004; update_irq_state(); // Bit 4 allows auto-reload m_tcntr[0] = BIT(m_tmode[0], 4) ? m_tload[0] : 0; m_timer[0]->adjust(cycles_to_attotime((256 - m_tcntr[0]) * tclk_pres_div(m_tmode[0] & 0x07))); } TIMER_CALLBACK_MEMBER(st2204_device::t1_interrupt) { m_ireq |= 0x008; update_irq_state(); // Bit 4 allows auto-reload m_tcntr[1] = BIT(m_tmode[1], 4) ? m_tload[1] : 0; if (!BIT(m_tmode[1], 3)) m_timer[1]->adjust(cycles_to_attotime((256 - m_tcntr[1]) * tclk_pres_div(m_tmode[1] & 0x07))); else if ((m_tmode[1] & 0x07) < 3) t1_start_from_oscx(); } void st2204_device::timer_start_from_tclk(int t) { u32 div = tclk_pres_div(m_tmode[t] & 0x07); m_timer[t]->adjust(cycles_to_attotime((255 - m_tcntr[t]) * div + div - (pres_count() & (div - 1)))); } void st2204_device::t1_start_from_oscx() { u32 div = 256 >> (m_tmode[1] & 0x03); m_timer[1]->adjust(attotime::from_ticks(div, 32768)); } u8 st2204_device::t0m_r() { return m_tmode[0]; } void st2204_device::t0m_w(u8 data) { u8 t0m_old = std::exchange(m_tmode[0], data & 0x37); if ((data & 0x27) != (t0m_old & 0x27) && (m_prs & 0x60) == 0x40) { // forced update m_tcntr[0] = t0c_r(); if (BIT(data, 5)) timer_start_from_tclk(0); else if (BIT(t0m_old, 5)) m_timer[0]->adjust(attotime::never); } } u8 st2204_device::t0c_r() { if ((m_prs & 0x60) != 0x40 || !BIT(m_tmode[0], 5)) return m_tcntr[0]; else { u32 div = tclk_pres_div(m_tmode[0] & 0x07); return 255 - u8(attotime_to_cycles(m_timer[0]->remaining()) / div); } } void st2204_device::t0c_w(u8 data) { m_tcntr[0] = m_tload[0] = data; if ((m_prs & 0x60) == 0x40 && BIT(m_tmode[0], 5)) timer_start_from_tclk(0); } u8 st2204_device::t1m_r() { return m_tmode[1]; } void st2204_device::t1m_w(u8 data) { data &= 0x1f; u8 t1m_old = std::exchange(m_tmode[1], data); if ((data & 0x0f) != (t1m_old & 0x0f)) { // forced update m_tcntr[1] = t1c_r(); if (!BIT(data, 3)) { if ((m_prs & 0x60) == 0x40) timer_start_from_tclk(1); else m_timer[1]->adjust(attotime::never); } else if (data < 0x0b) t1_start_from_oscx(); // TODO: BGRCK source } } u8 st2204_device::t1c_r() { if (!BIT(m_tmode[1], 3)) { if ((m_prs & 0x60) != 0x40) return m_tcntr[1]; else { u32 div = tclk_pres_div(m_tmode[1] & 0x07); return 255 - u8(attotime_to_cycles(m_timer[1]->remaining()) / div); } } else if ((m_tmode[1] & 0x07) < 3) { u32 div = 256 >> (m_tmode[1] & 0x03); return 255 - u8(m_timer[1]->remaining().as_ticks(32768) / div); } else return m_tcntr[1]; } void st2204_device::t1c_w(u8 data) { m_tcntr[1] = m_tload[1] = data; } void st2204_device::st2xxx_tclk_start() { if (BIT(m_tmode[0], 5)) timer_start_from_tclk(0); if (!BIT(m_tmode[1], 3)) timer_start_from_tclk(1); } void st2204_device::st2xxx_tclk_stop() { if (m_timer[0]->enabled()) { m_tcntr[0] = t0c_r(); m_timer[0]->adjust(attotime::never); } if (!BIT(m_tmode[1], 3)) { m_tcntr[1] = t1c_r(); m_timer[1]->adjust(attotime::never); } } TIMER_CALLBACK_MEMBER(st2204_device::psg_interrupt) { m_ireq |= 0x002; update_irq_state(); psg_timer_reload(); } void st2204_device::psg_timer_reload() { unsigned count; if (BIT(m_psgc, 0)) count = (0x40 - BIT(m_psg[1], 6, 6)) * (0x40 - BIT(m_psg[1], 0, 6)) * 64; else if ((m_psgc & 0x0d) == 0x04) count = 0x1000 - m_psg[1]; else return; if ((m_psgc & 0x70) == 0x40) m_psg_timer->adjust(cycles_to_attotime(count)); else if ((m_psgc & 0x70) == 0x70) m_psg_timer->adjust(attotime::from_ticks(count, 32768)); else m_psg_timer->adjust(cycles_to_attotime(count << (BIT(m_psgc, 4, 2) + 1))); } u8 st2204_device::psg_r(offs_t offset) { // TODO: instantaneous upcount value if (BIT(offset, 0)) return (m_psg[offset >> 1] >> 8) | 0xf0; else return m_psg[offset >> 1] & 0x0ff; } void st2204_device::psg_w(offs_t offset, u8 data) { if (BIT(offset, 0)) m_psg[offset >> 1] = u16(data & 0x0f) << 8 | (m_psg[offset >> 1] & 0x0ff); else m_psg[offset >> 1] = data | (m_psg[offset >> 1] & 0xf00); } u8 st2204_device::psgc_r() { return m_psgc | 0x80; } void st2204_device::psgc_w(u8 data) { m_psgc = data & 0x7f; if (!m_psg_timer->enabled()) psg_timer_reload(); } u8 st2204_device::vol_r() { return m_vol; } void st2204_device::vol_w(u8 data) { m_vol = data; } u8 st2204_device::dac_r() { return m_dac; } void st2204_device::dac_w(u8 data) { // TODO: emulate PSG/PWM more accurately within device m_dac_callback(data); m_dac = data; } unsigned st2204_device::st2xxx_lfr_clocks() const { // ST2202 datasheet suggests 1/4 as many clocks in 4-bit mode; this seems too fast for GameKing 3 (TODO: double-check this) unsigned lcdcks = ((m_lxmax + m_lfra) * 2 + 3) * 8 * (m_lymax ? m_lymax : 256); if (BIT(m_lckr, 4)) return lcdcks * std::max((m_lckr & 0x0f) * 2, 1); else return lcdcks * std::max(((m_lckr & 0x0c) >> 2) * 2, 1); } u8 st2204_device::dmsl_r() { return m_dms & 0xff; } void st2204_device::dmsl_w(u8 data) { m_dms = (m_dms & 0xff00) | data; } u8 st2204_device::dmsh_r() { return m_dms >> 8; } void st2204_device::dmsh_w(u8 data) { m_dms = (m_dms & 0x00ff) | u16(data) << 8; } u8 st2204_device::dmdl_r() { return m_dmd & 0xff; } void st2204_device::dmdl_w(u8 data) { m_dmd = (m_dmd & 0xff00) | data; } u8 st2204_device::dmdh_r() { return m_dmd >> 8; } void st2204_device::dmdh_w(u8 data) { m_dmd = (m_dmd & 0x00ff) | u16(data) << 8; } void st2204_device::dcntl_w(u8 data) { u16 count = data | u16(m_dcnth & 0x0f) << 8; // FIXME: not instantaneous (obviously), but takes 2 cycles per transfer while CPU is halted mi_st2204 &intf = downcast(*mintf); while (count != 0xffff) { intf.write(m_dmd, intf.read_dma(m_dms)); if (m_dms++ == 0xffff) { // DMR bank increments automatically when source is in data memory m_dms = 0x8000; intf.dmr = (intf.dmr + 1) & 0x7ff; } // DMAM inhibits destination increment if (!BIT(m_dcnth, 4)) m_dmd++; count--; } } void st2204_device::dcnth_w(u8 data) { m_dcnth = data & 0x1f; } u8 st2204_device::dmrl_r() { return downcast(*mintf).dmr & 0xff; } void st2204_device::dmrl_w(u8 data) { u16 &dmr = downcast(*mintf).dmr; dmr = (data & m_drr_mask) | (dmr & 0xff00); } u8 st2204_device::dmrh_r() { return downcast(*mintf).dmr >> 8; } void st2204_device::dmrh_w(u8 data) { u16 &dmr = downcast(*mintf).dmr; dmr = ((u16(data) << 8) & m_drr_mask) | (dmr & 0x00ff); } u8 st2204_device::pmem_r(offs_t offset) { return downcast(*mintf).pread(offset); } void st2204_device::pmem_w(offs_t offset, u8 data) { downcast(*mintf).pwrite(offset, data); } u8 st2204_device::dmem_r(offs_t offset) { return downcast(*mintf).dread(offset); } void st2204_device::dmem_w(offs_t offset, u8 data) { downcast(*mintf).dwrite(offset, data); } void st2204_device::common_map(address_map &map) { map(0x0000, 0x0004).rw(FUNC(st2204_device::pdata_r), FUNC(st2204_device::pdata_w)); map(0x0005, 0x0005).rw(FUNC(st2204_device::psc_r), FUNC(st2204_device::psc_w)); map(0x0008, 0x000c).rw(FUNC(st2204_device::pctrl_r), FUNC(st2204_device::pctrl_w)); map(0x000d, 0x000d).rw(FUNC(st2204_device::pfc_r), FUNC(st2204_device::pfc_w)); map(0x000e, 0x000e).rw(FUNC(st2204_device::pfd_r), FUNC(st2204_device::pfd_w)); map(0x000f, 0x000f).rw(FUNC(st2204_device::pmcr_r), FUNC(st2204_device::pmcr_w)); map(0x0010, 0x0013).w(FUNC(st2204_device::psg_w)); map(0x0014, 0x0014).w(FUNC(st2204_device::dac_w)); map(0x0016, 0x0016).w(FUNC(st2204_device::psgc_w)); map(0x0017, 0x0017).w(FUNC(st2204_device::vol_w)); map(0x0020, 0x0020).rw(FUNC(st2204_device::bten_r), FUNC(st2204_device::bten_w)); map(0x0021, 0x0021).rw(FUNC(st2204_device::btsr_r), FUNC(st2204_device::btclr_all_w)); map(0x0023, 0x0023).rw(FUNC(st2204_device::prs_r), FUNC(st2204_device::prs_w)); map(0x0024, 0x0024).rw(FUNC(st2204_device::t0m_r), FUNC(st2204_device::t0m_w)); map(0x0025, 0x0025).rw(FUNC(st2204_device::t0c_r), FUNC(st2204_device::t0c_w)); map(0x0026, 0x0026).rw(FUNC(st2204_device::t1m_r), FUNC(st2204_device::t1m_w)); map(0x0027, 0x0027).rw(FUNC(st2204_device::t1c_r), FUNC(st2204_device::t1c_w)); map(0x0028, 0x0028).w(FUNC(st2204_device::dmsl_w)); map(0x0029, 0x0029).w(FUNC(st2204_device::dmsh_w)); map(0x002a, 0x002a).w(FUNC(st2204_device::dmdl_w)); map(0x002b, 0x002b).w(FUNC(st2204_device::dmdh_w)); map(0x002c, 0x002c).w(FUNC(st2204_device::dcntl_w)); map(0x002d, 0x002d).w(FUNC(st2204_device::dcnth_w)); map(0x0030, 0x0030).rw(FUNC(st2204_device::sys_r), FUNC(st2204_device::sys_w)); map(0x0031, 0x0031).rw(FUNC(st2204_device::irrl_r), FUNC(st2204_device::irrl_w)); map(0x0032, 0x0032).rw(FUNC(st2204_device::prrl_r), FUNC(st2204_device::prrl_w)); map(0x0033, 0x0033).rw(FUNC(st2204_device::prrh_r), FUNC(st2204_device::prrh_w)); map(0x0034, 0x0034).rw(FUNC(st2204_device::drrl_r), FUNC(st2204_device::drrl_w)); map(0x0035, 0x0035).rw(FUNC(st2204_device::drrh_r), FUNC(st2204_device::drrh_w)); map(0x0036, 0x0036).rw(FUNC(st2204_device::dmrl_r), FUNC(st2204_device::dmrl_w)); map(0x0037, 0x0037).rw(FUNC(st2204_device::dmrh_r), FUNC(st2204_device::dmrh_w)); map(0x0038, 0x0038).rw(FUNC(st2204_device::misc_r), FUNC(st2204_device::misc_w)); map(0x003c, 0x003c).rw(FUNC(st2204_device::ireql_r), FUNC(st2204_device::ireql_w)); map(0x003d, 0x003d).rw(FUNC(st2204_device::ireqh_r), FUNC(st2204_device::ireqh_w)); map(0x003e, 0x003e).rw(FUNC(st2204_device::ienal_r), FUNC(st2204_device::ienal_w)); map(0x003f, 0x003f).rw(FUNC(st2204_device::ienah_r), FUNC(st2204_device::ienah_w)); map(0x0040, 0x0040).w(FUNC(st2204_device::lssal_w)); map(0x0041, 0x0041).w(FUNC(st2204_device::lssah_w)); map(0x0042, 0x0042).w(FUNC(st2204_device::lvpw_w)); map(0x0043, 0x0043).rw(FUNC(st2204_device::lxmax_r), FUNC(st2204_device::lxmax_w)); map(0x0044, 0x0044).rw(FUNC(st2204_device::lymax_r), FUNC(st2204_device::lymax_w)); map(0x0045, 0x0045).rw(FUNC(st2204_device::lpan_r), FUNC(st2204_device::lpan_w)); map(0x0047, 0x0047).rw(FUNC(st2204_device::lctr_r), FUNC(st2204_device::lctr_w)); map(0x0048, 0x0048).w(FUNC(st2204_device::lckr_w)); map(0x0049, 0x0049).w(FUNC(st2204_device::lfra_w)); map(0x004a, 0x004a).rw(FUNC(st2204_device::lac_r), FUNC(st2204_device::lac_w)); map(0x004b, 0x004b).rw(FUNC(st2204_device::lpwm_r), FUNC(st2204_device::lpwm_w)); map(0x004c, 0x004c).rw(FUNC(st2204_device::pl_r), FUNC(st2204_device::pl_w)); // PCL is listed as write-only in ST2202 specification, but DynamiDesk suggests otherwise map(0x004e, 0x004e).rw(FUNC(st2204_device::pcl_r), FUNC(st2204_device::pcl_w)); map(0x0052, 0x0052).rw(FUNC(st2204_device::sctr_r), FUNC(st2204_device::sctr_w)); map(0x0053, 0x0053).rw(FUNC(st2204_device::sckr_r), FUNC(st2204_device::sckr_w)); map(0x0054, 0x0054).rw(FUNC(st2204_device::ssr_r), FUNC(st2204_device::ssr_w)); map(0x0060, 0x0060).rw(FUNC(st2204_device::uctr_r), FUNC(st2204_device::uctr_w)); map(0x0061, 0x0061).rw(FUNC(st2204_device::usr_r), FUNC(st2204_device::ustr_trg_w)); map(0x0062, 0x0062).rw(FUNC(st2204_device::irctr_r), FUNC(st2204_device::irctr_w)); map(0x0063, 0x0063).rw(FUNC(st2204_device::bctr_r), FUNC(st2204_device::bctr_w)); map(0x0066, 0x0066).rw(FUNC(st2204_device::brs_r), FUNC(st2204_device::brs_w)); map(0x0067, 0x0067).rw(FUNC(st2204_device::bdiv_r), FUNC(st2204_device::bdiv_w)); map(0x4000, 0x7fff).rw(FUNC(st2204_device::pmem_r), FUNC(st2204_device::pmem_w)); map(0x8000, 0xffff).rw(FUNC(st2204_device::dmem_r), FUNC(st2204_device::dmem_w)); } void st2202_device::int_map(address_map &map) { common_map(map); map(0x0080, 0x0fff).ram(); } void st2204_device::int_map(address_map &map) { common_map(map); // PSG registers may or may not be readable on ST2202, but are readable here map(0x0010, 0x0013).r(FUNC(st2204_device::psg_r)); map(0x0014, 0x0014).r(FUNC(st2204_device::dac_r)); map(0x0016, 0x0016).r(FUNC(st2204_device::psgc_r)); map(0x0017, 0x0017).r(FUNC(st2204_device::vol_r)); // Source/destination registers are supposedly not readable on ST2202, but may be readable here (count register isn't) map(0x0028, 0x0028).r(FUNC(st2204_device::dmsl_r)); map(0x0029, 0x0029).r(FUNC(st2204_device::dmsh_r)); map(0x002a, 0x002a).r(FUNC(st2204_device::dmdl_r)); map(0x002b, 0x002b).r(FUNC(st2204_device::dmdh_r)); map(0x0080, 0x287f).ram(); // 2800-287F possibly not present in earlier versions }