summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/machine/smpc.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/devices/machine/smpc.cpp')
-rw-r--r--src/devices/machine/smpc.cpp26
1 files changed, 14 insertions, 12 deletions
diff --git a/src/devices/machine/smpc.cpp b/src/devices/machine/smpc.cpp
index aa8ef073dbb..042fbbc143e 100644
--- a/src/devices/machine/smpc.cpp
+++ b/src/devices/machine/smpc.cpp
@@ -14,7 +14,8 @@ TODO:
- fix intback issue with inputs (according to the docs, it should fall in between
VBLANK-IN and OUT, for obvious reasons);
- clean-ups;
-- RTC device (unknown type, handled here for convenience)
+- RTC subdevice (unknown type, handled here for convenience);
+- Does ST-V even has a battery backed NVRAM?
Notes:
SMPC NVRAM contents:
@@ -204,7 +205,7 @@ smpc_hle_device::smpc_hle_device(const machine_config &mconfig, const char *tag,
: device_t(mconfig, SMPC_HLE, tag, owner, clock),
device_memory_interface(mconfig, *this),
m_space_config("regs", ENDIANNESS_LITTLE, 8, 7, 0, nullptr, *ADDRESS_MAP_NAME(smpc_regs)),
- m_smpc_nv(*this, "smpc_nv"),
+ m_mini_nvram(*this, "nvram"),
m_mshres(*this),
m_mshnmi(*this),
m_sshres(*this),
@@ -247,7 +248,7 @@ void smpc_hle_device::static_set_control_port_tags(device_t &device, const char
//-------------------------------------------------
MACHINE_CONFIG_MEMBER(smpc_hle_device::device_add_mconfig)
- MCFG_NVRAM_ADD_0FILL("smpc_nv") // TODO: default for each region (+ move it inside SMPC when converted to device)
+ MCFG_NVRAM_ADD_1FILL("nvram")
// TODO: custom RTC subdevice
MACHINE_CONFIG_END
@@ -261,8 +262,8 @@ void smpc_hle_device::device_start()
system_time systime;
machine().base_datetime(systime);
- m_smpc_nv->set_base(&m_smem, 4);
-
+ m_mini_nvram->set_base(&m_smem, 4);
+
m_mshres.resolve_safe();
m_mshnmi.resolve_safe();
m_sshres.resolve_safe();
@@ -345,6 +346,9 @@ void smpc_hle_device::device_reset()
m_cur_dotsel = false;
m_rtc_timer->adjust(attotime::zero, 0, attotime::from_seconds(1));
+
+// check if SMEM has valid data (default 1 filled), if not then simulate a battery backup fail (-> call the RTC / Language select menu for Saturn)
+ m_settime = m_smem[0] != 0xff;
}
device_memory_interface::space_config_vector smpc_hle_device::memory_space_config() const
@@ -504,11 +508,6 @@ uint8_t smpc_hle_device::get_ddr(bool which)
}
-inline bool smpc_hle_device::get_nmi_status()
-{
- return m_NMI_reset;
-}
-
inline void smpc_hle_device::master_sh2_nmi()
{
m_mshnmi(1);
@@ -657,6 +656,9 @@ void smpc_hle_device::device_timer(emu_timer &timer, device_timer_id id, int par
case 0x16: // SETTIME
{
+ // setting this up will clear the set time in case of battery backed died
+ m_settime = true;
+
for(int i=0;i<7;i++)
m_rtc_data[i] = m_ireg[i];
break;
@@ -714,8 +716,8 @@ void smpc_hle_device::resolve_intback()
if(m_intback_buf[0] != 0)
{
- m_oreg[0] = ((0x80) | ((m_NMI_reset & 1) << 6));
-
+ m_oreg[0] = ((m_settime << 7) | ((m_NMI_reset & 1) << 6));
+
for(i=0;i<7;i++)
m_oreg[1+i] = m_rtc_data[i];