Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-04-27 18:53:05 +03:00
Code Issues Actions Packages Projects Releases Wiki Activity

geneve: Fix GPL mode lockup, caused by prior interrupt latch modifications.

Browse Source
This commit is contained in:
Michael Zapf 2019-03-07 21:10:01 +01:00
parent f86ffd0802
commit da3c5ca875
1 changed files with 7 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
src/devices/cpu/tms9900/tms9995.cpp
View File

@ -1508,10 +1508,13 @@ void tms9995_device::int_prefetch_and_decode()
// If the current command is XOP or BLWP, ignore the interrupt // If the current command is XOP or BLWP, ignore the interrupt
if (m_command != XOP && m_command != BLWP) if (m_command != XOP && m_command != BLWP)
{ {
if (m_flag[2] && intmask >= 1) m_int_pending |= PENDING_LEVEL1; // The actual interrupt trigger is an OR of the latch and of
// the interrupt line (for INT1 and INT4); see [1],
// section 2.3.2.1.3
if ((m_int1_active || m_flag[2]) && intmask >= 1) m_int_pending |= PENDING_LEVEL1;
if (m_int_overflow && intmask >= 2) m_int_pending |= PENDING_OVERFLOW; if (m_int_overflow && intmask >= 2) m_int_pending |= PENDING_OVERFLOW;
if (m_flag[3] && intmask >= 3) m_int_pending |= PENDING_DECR; if (m_flag[3] && intmask >= 3) m_int_pending |= PENDING_DECR;
if (m_flag[4] && intmask >= 4) m_int_pending |= PENDING_LEVEL4; if ((m_int4_active || m_flag[4]) && intmask >= 4) m_int_pending |= PENDING_LEVEL4;
} }
if (m_int_pending!=0) if (m_int_pending!=0)
@ -2082,8 +2085,7 @@ void tms9995_device::return_with_address_copy()
1FDA MID flag (only indication, does not trigger when set) 1FDA MID flag (only indication, does not trigger when set)
The TMS9995 allows for wait states during external CRU access. Therefore The TMS9995 allows for wait states during external CRU access. Therefore
we read one block of 8 bits in one go (as given by the MESS architecture) we do iterations for each bit, checking every time for the READY line
but we do iterations for each bit, checking every time for the READY line
in the main loop. in the main loop.
(write) (write)
@ -2159,6 +2161,7 @@ void tms9995_device::cru_input_operation()
m_pass = m_count; m_pass = m_count;
} }
// Read a single CRU bit
bool crubit = BIT(m_cru->read_byte(m_cru_address & CRUREADMASK), 0); bool crubit = BIT(m_cru->read_byte(m_cru_address & CRUREADMASK), 0);
m_cru_value = (m_cru_value >> 1) & 0x7fff; m_cru_value = (m_cru_value >> 1) & 0x7fff;