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ti99/geneve: TIPI: Fixed crash on empty queue access and network instabilities.

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This commit is contained in:
Michael Zapf 2022-06-07 01:41:58 +02:00
parent 9b961a538a
commit 91e217332f
2 changed files with 7 additions and 3 deletions
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9
src/devices/bus/ti99/peb/tipi.cpp
View File

@ -105,6 +105,7 @@ tipi_card_device::tipi_card_device(const machine_config &mconfig, const char *ta
m_waitinit(false),
m_rpiconn(false),
m_tc(0),
m_rd(0),
m_lasttc(0)
{
}
@ -155,9 +156,8 @@ void tipi_card_device::readz(offs_t offset, uint8_t *value)
int val = 0;
if (m_address & 2)
{
val = m_indqueue.front();
m_indqueue.pop();
LOGMASKED(LOG_PORTS, "RDIN -> %02x\n", val);
LOGMASKED(LOG_PORTS, "RDIN -> %02x\n", m_rd);
val = m_rd;
}
else
{
@ -393,6 +393,9 @@ void tipi_card_device::process_message()
{
m_rc = m_tc; // Auto-acknowledge
m_lasttc = m_tc;
m_rd = m_indqueue.front();
m_indqueue.pop();
}
}
}

1
src/devices/bus/ti99/peb/tipi.h
View File

@ -88,6 +88,7 @@ private:
u8 m_tc;
u8 m_td;
u8 m_rc;
u8 m_rd;
u8 m_lasttc;
};