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i8257: Added safety. (nw)

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This commit is contained in:
Curt Coder 2014-04-29 10:29:19 +00:00
parent 065a1a392e
commit ea2c53b539
1 changed files with 15 additions and 5 deletions
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20
src/emu/machine/i8257.c
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@ -169,6 +169,7 @@ inline void i8257n_device::dma_read()
m_temp = m_in_memr_cb(offset);
break;
}
}
@ -250,9 +251,18 @@ i8257n_device::i8257n_device(const machine_config &mconfig, const char *tag, dev
: device_t(mconfig, I8257N, "I8257N", tag, owner, clock, "i8257n", __FILE__),
device_execute_interface(mconfig, *this),
m_icount(0),
m_tc(false),
m_msb(0),
m_hreq(CLEAR_LINE),
m_hack(0),
m_ready(1),
m_state(0),
m_current_channel(0),
m_last_channel(0),
m_transfer_mode(0),
m_status(0),
m_request(0),
m_temp(0),
m_out_hrq_cb(*this),
m_out_tc_cb(*this),
m_in_memr_cb(*this),
@ -285,12 +295,12 @@ void i8257n_device::device_start()
// resolve callbacks
m_out_hrq_cb.resolve_safe();
m_out_tc_cb.resolve_safe();
m_in_memr_cb.resolve();
m_in_memr_cb.resolve_safe(0);
m_out_memw_cb.resolve_safe();
m_in_ior_0_cb.resolve();
m_in_ior_1_cb.resolve();
m_in_ior_2_cb.resolve();
m_in_ior_3_cb.resolve();
m_in_ior_0_cb.resolve_safe(0);
m_in_ior_1_cb.resolve_safe(0);
m_in_ior_2_cb.resolve_safe(0);
m_in_ior_3_cb.resolve_safe(0);
m_out_iow_0_cb.resolve_safe();
m_out_iow_1_cb.resolve_safe();
m_out_iow_2_cb.resolve_safe();