diff options
Diffstat (limited to 'src/devices/cpu/m6502/rp2a03.h')
-rw-r--r-- | src/devices/cpu/m6502/rp2a03.h | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/src/devices/cpu/m6502/rp2a03.h b/src/devices/cpu/m6502/rp2a03.h new file mode 100644 index 00000000000..4112bbbe152 --- /dev/null +++ b/src/devices/cpu/m6502/rp2a03.h @@ -0,0 +1,91 @@ +// license:BSD-3-Clause +// copyright-holders:Olivier Galibert +/*************************************************************************** + + rp2a03.h + + 6502, NES variant + +***************************************************************************/ +#ifndef MAME_CPU_M6502_RP2A03_H +#define MAME_CPU_M6502_RP2A03_H + +#pragma once + +#include "m6502.h" +#include "sound/nes_apu.h" + +class rp2a03_core_device : public m6502_device { +public: + rp2a03_core_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); + + virtual std::unique_ptr<util::disasm_interface> create_disassembler() override; + + virtual void do_exec_full() override; + virtual void do_exec_partial() override; + +protected: + rp2a03_core_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock); + +#define O(o) void o ## _full(); void o ## _partial() + + // rp2a03 opcodes - same as 6502 with D disabled + O(adc_nd_aba); O(adc_nd_abx); O(adc_nd_aby); O(adc_nd_idx); O(adc_nd_idy); O(adc_nd_imm); O(adc_nd_zpg); O(adc_nd_zpx); + O(arr_nd_imm); + O(isb_nd_aba); O(isb_nd_abx); O(isb_nd_aby); O(isb_nd_idx); O(isb_nd_idy); O(isb_nd_zpg); O(isb_nd_zpx); + O(rra_nd_aba); O(rra_nd_abx); O(rra_nd_aby); O(rra_nd_idx); O(rra_nd_idy); O(rra_nd_zpg); O(rra_nd_zpx); + O(sbc_nd_aba); O(sbc_nd_abx); O(sbc_nd_aby); O(sbc_nd_idx); O(sbc_nd_idy); O(sbc_nd_imm); O(sbc_nd_zpg); O(sbc_nd_zpx); + +#undef O + +private: +}; + +class rp2a03_device : public rp2a03_core_device, public device_mixer_interface { +public: + rp2a03_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); + + void rp2a03_map(address_map &map) ATTR_COLD; + +protected: + rp2a03_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock); + + required_device<nesapu_device> m_apu; + + virtual void device_add_mconfig(machine_config &config) override ATTR_COLD; + + void apu_irq(int state); + uint8_t apu_read_mem(offs_t offset); +}; + +class rp2a03g_device : public rp2a03_device +{ +public: + rp2a03g_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); + +protected: + virtual void device_add_mconfig(machine_config &config) override ATTR_COLD; +}; + +/* These are the official XTAL values and clock rates used by Nintendo for + manufacturing throughout the production of the 2A03. PALC_APU_CLOCK is + the clock rate devised by UMC(?) for PAL Famicom clone hardware. */ + +#define RP2A03_NTSC_XTAL XTAL(21'477'272) +#define RP2A03_PAL_XTAL XTAL(26'601'712) +#define NTSC_APU_CLOCK (RP2A03_NTSC_XTAL/12) /* 1.7897726666... MHz */ +#define PAL_APU_CLOCK (RP2A03_PAL_XTAL/16) /* 1.662607 MHz */ +#define PALC_APU_CLOCK (RP2A03_PAL_XTAL/15) /* 1.77344746666... MHz */ + +enum { + RP2A03_IRQ_LINE = m6502_device::IRQ_LINE, + RP2A03_APU_IRQ_LINE = m6502_device::APU_IRQ_LINE, + RP2A03_NMI_LINE = m6502_device::NMI_LINE, + RP2A03_SET_OVERFLOW = m6502_device::V_LINE +}; + +DECLARE_DEVICE_TYPE(RP2A03_CORE, rp2a03_core_device) +DECLARE_DEVICE_TYPE(RP2A03, rp2a03_device) +DECLARE_DEVICE_TYPE(RP2A03G, rp2a03g_device) + +#endif // MAME_CPU_M6502_RP2A03_H |