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psr500: Fake a periodic interrupt; add placeholders for various internal registers

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This commit is contained in:
AJR 2023-04-11 16:04:47 -04:00
parent b6c949ed22
commit 2fec5dcf43
1 changed files with 37 additions and 1 deletions
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38
src/mame/yamaha/ympsr400.cpp
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@ -28,15 +28,31 @@ public:
protected:
virtual void driver_start() override;
virtual void machine_start() override;
private:
TIMER_CALLBACK_MEMBER(interrupt_hack);
void program_map(address_map &map);
void data_map(address_map &map);
required_device<cpu_device> m_maincpu;
required_device<cpu_device> m_mpscpu;
emu_timer *m_hack_timer;
};
void psr400_state::machine_start()
{
m_hack_timer = timer_alloc(FUNC(psr400_state::interrupt_hack), this);
m_hack_timer->adjust(attotime::from_msec(1), 0, attotime::from_msec(1));
}
TIMER_CALLBACK_MEMBER(psr400_state::interrupt_hack)
{
m_maincpu->set_state_int(mn1880_device::MN1880_IF, m_maincpu->state_int(mn1880_device::MN1880_IF) | (1 << 3));
}
void psr400_state::program_map(address_map &map)
{
// 2 MB external program memory space using MMU
@ -46,7 +62,27 @@ void psr400_state::program_map(address_map &map)
void psr400_state::data_map(address_map &map)
{
// 2 MB external data memory space using MMU
map(0x000000, 0x000000).nopw(); // ?
map(0x000001, 0x000001).nopr(); // ?
map(0x000011, 0x000011).noprw(); // ?
map(0x000014, 0x000014).noprw(); // ?
map(0x000018, 0x000018).lr8(NAME([]() { return 0; })); // serial status?
map(0x00001a, 0x00001a).nopw(); // serial transmit buffer?
map(0x000030, 0x000031).ram(); // ?
map(0x000034, 0x000036).noprw(); // ?
map(0x00003a, 0x00003b).noprw(); // ?
map(0x00003e, 0x00003f).noprw(); // ?
map(0x000050, 0x000053).ram(); // ?
map(0x000055, 0x000055).noprw(); // ?
map(0x00005d, 0x00005e).noprw(); // ?
map(0x000080, 0x03ffff).mirror(0xc0000).ram(); // 2x 1M-bit PSRAM (only one on PSR-400)
map(0x003fe0, 0x003fff).unmaprw(); // window for more internal SFRs?
map(0x003fe3, 0x003fe3).noprw(); // ?
map(0x003fe6, 0x003fe6).nopw(); // ?
map(0x003fe7, 0x003fe7).noprw(); // ?
map(0x003fe9, 0x003fe9).nopr(); // ?
map(0x003fee, 0x003fee).lr8(NAME([]() { return 0x05; })).nopw(); // ?
map(0x003ff3, 0x003ff3).noprw(); // ?
map(0x100000, 0x10000f).mirror(0xffff0).rw("gew8", FUNC(multipcm_device::read), FUNC(multipcm_device::write));
}
@ -55,7 +91,7 @@ INPUT_PORTS_END
void psr400_state::psr500(machine_config &config)
{
MN18801A(config, m_maincpu, 10_MHz_XTAL); // MN18801A (also has 500 kHz secondary resonator)
MN18801A(config, m_maincpu, 10_MHz_XTAL); // MN18801A (also has 500 kHz secondary resonator connected to XI)
m_maincpu->set_addrmap(AS_PROGRAM, &psr400_state::program_map);
m_maincpu->set_addrmap(AS_DATA, &psr400_state::data_map);