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Revert of a portion of r20073:

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idectrl.c  [Peter Ferrie]
- correct status flags for multi-sector reads
- implement more correct controller reset values
- fix phantom slave drive detection problem

Causes problems noted with many MAME games such as Area 51: Site 4, Primal Rage 2, All Viper.c games among others that are either not starting or constantly RE-starting looking for proper IDE communications.
This commit is contained in:
Scott Stone 2013-01-05 22:43:37 +00:00
parent 5bf7f966fd
commit dac3c173c6
1 changed files with 6 additions and 21 deletions
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27
src/emu/machine/idectrl.c
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@ -518,10 +518,8 @@ void ide_controller_device::continue_read()
/* reset the totals */ /* reset the totals */
buffer_offset = 0; buffer_offset = 0;
/* clear just the busy flag /* clear the buffer ready and busy flag */
the buffer ready flag stays set until all sectors are read status &= ~IDE_STATUS_BUFFER_READY;
*/
// status &= ~IDE_STATUS_BUFFER_READY;
status &= ~IDE_STATUS_BUSY; status &= ~IDE_STATUS_BUSY;
if (master_password_enable || user_password_enable) if (master_password_enable || user_password_enable)
@ -542,7 +540,6 @@ void ide_controller_device::continue_read()
read_next_sector(); read_next_sector();
else else
{ {
status &= ~IDE_STATUS_BUFFER_READY; /* now clear it */
bus_master_status &= ~IDE_BUSMASTER_STATUS_ACTIVE; bus_master_status &= ~IDE_BUSMASTER_STATUS_ACTIVE;
dma_active = 0; dma_active = 0;
} }
@ -699,7 +696,7 @@ void ide_controller_device::read_first_sector()
void ide_controller_device::read_next_sector() void ide_controller_device::read_next_sector()
{ {
/* mark ourselves busy */ /* mark ourselves busy */
// status |= IDE_STATUS_BUSY; status |= IDE_STATUS_BUSY;
if (command == IDE_COMMAND_READ_MULTIPLE_BLOCK) if (command == IDE_COMMAND_READ_MULTIPLE_BLOCK)
{ {
@ -1183,10 +1180,6 @@ UINT32 ide_controller_device::ide_controller_read(int bank, offs_t offset, int s
status &= ~IDE_STATUS_DRIVE_READY; status &= ~IDE_STATUS_DRIVE_READY;
} }
} }
else
{
return 0;
}
switch (BANK(bank, offset)) switch (BANK(bank, offset))
{ {
@ -1439,17 +1432,9 @@ void ide_controller_device::ide_controller_write(int bank, offs_t offset, int si
//if (data == 0x04) //if (data == 0x04)
if (data & 0x04) if (data & 0x04)
{ {
// status |= IDE_STATUS_BUSY; status |= IDE_STATUS_BUSY;
// status &= ~IDE_STATUS_DRIVE_READY; status &= ~IDE_STATUS_DRIVE_READY;
// reset_timer->adjust(attotime::from_msec(5)); reset_timer->adjust(attotime::from_msec(5));
device_reset(); /* deliver instantly to support buggy BIOSes that don't poll properly */
sector_count = 1;
drive[0].cur_sector = 1;
drive[0].cur_head = 0;
drive[0].cur_cylinder = 0;
drive[1].cur_sector = 1;
drive[1].cur_head = 0;
drive[1].cur_cylinder = 0;
} }
break; break;
} }