Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-07-04 09:28:51 +03:00
Code Issues Actions 4 Packages Projects Releases Wiki Activity

Fixed head incrementing when using CHS with 16 heads (nw)

Browse Source
This commit is contained in:
smf- 2013-06-16 22:45:51 +00:00
parent eb5c9decf4
commit 42d77a2f41
1 changed files with 10 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
src/emu/machine/idehd.c
View File

@ -457,6 +457,8 @@ void ide_mass_storage_device::signal_delayed_interrupt(attotime time, int buffer
void ide_mass_storage_device::next_sector() void ide_mass_storage_device::next_sector()
{ {
UINT8 cur_head = m_device_head & IDE_DEVICE_HEAD_HS;
/* LBA direct? */ /* LBA direct? */
if (m_device_head & IDE_DEVICE_HEAD_L) if (m_device_head & IDE_DEVICE_HEAD_L)
{ {
@ -468,7 +470,7 @@ void ide_mass_storage_device::next_sector()
{ {
m_cylinder_high++; m_cylinder_high++;
if (m_cylinder_high == 0) if (m_cylinder_high == 0)
m_device_head = (m_device_head & ~IDE_DEVICE_HEAD_HS) | ((m_device_head + 1) & IDE_DEVICE_HEAD_HS); cur_head++;
} }
} }
} }
@ -482,10 +484,10 @@ void ide_mass_storage_device::next_sector()
{ {
/* heads are 0 based */ /* heads are 0 based */
m_sector_number = 1; m_sector_number = 1;
m_device_head = (m_device_head & ~IDE_DEVICE_HEAD_HS) | ((m_device_head + 1) & IDE_DEVICE_HEAD_HS); cur_head++;
if ((m_device_head & IDE_DEVICE_HEAD_HS) >= m_num_heads) if (cur_head >= m_num_heads)
{ {
m_device_head &= ~IDE_DEVICE_HEAD_HS; cur_head = 0;
m_cylinder_low++; m_cylinder_low++;
if (m_cylinder_low == 0) if (m_cylinder_low == 0)
m_cylinder_high++; m_cylinder_high++;
@ -493,6 +495,8 @@ void ide_mass_storage_device::next_sector()
} }
} }
m_device_head = (m_device_head & ~IDE_DEVICE_HEAD_HS) | cur_head;
m_cur_lba = lba_address(); m_cur_lba = lba_address();
} }