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fix for divide by zero, if there is no chd. (nw)

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smf- 2013-11-28 16:14:04 +00:00
parent 1df74f4123
commit 7dfecdc03b
1 changed files with 10 additions and 4 deletions
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14
src/emu/machine/idehd.c
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@ -22,6 +22,9 @@
ata_mass_storage_device::ata_mass_storage_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock,const char *shortname, const char *source)
: ata_hle_device(mconfig, type, name, tag, owner, clock, shortname, source),
m_can_identify_device(0),
m_num_cylinders(0),
m_num_sectors(0),
m_num_heads(0),
m_master_password(NULL),
m_user_password(NULL)
{
@ -341,11 +344,14 @@ void ata_mass_storage_device::security_error()
attotime ata_mass_storage_device::seek_time()
{
/* just set a timer */
int new_lba = lba_address();
int sectors_per_cylinder = m_num_heads * m_num_sectors;
int old_cylinder = m_cur_lba / (m_num_heads * m_num_sectors);
int new_cylinder = new_lba / (m_num_heads * m_num_sectors);
if (sectors_per_cylinder == 0 || m_num_cylinders == 0)
return attotime::zero;
int new_lba = lba_address();
int old_cylinder = m_cur_lba / sectors_per_cylinder;
int new_cylinder = new_lba / sectors_per_cylinder;
int diff = abs(old_cylinder - new_cylinder);
m_cur_lba = new_lba;