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WD17xx: Connected Side Select Output for variants that support it. [Curt Coder]

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This commit is contained in:
Curt Coder 2011-09-18 14:04:03 +00:00
parent 3d2cda66bb
commit c1e7e1873d
1 changed files with 21 additions and 12 deletions
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33
src/emu/machine/wd17xx.c
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@ -139,6 +139,9 @@
2011-Jun-24 Curt Coder
- Added device types for all known variants, and enforced inverted DAL lines.
2011-Sep-18 Curt Coder
- Connected Side Select Output for variants that support it.
TODO:
- What happens if a track is read that doesn't have any id's on it?
@ -1003,7 +1006,22 @@ static int wd17xx_find_sector(device_t *device)
return 0;
}
static void wd17xx_side_compare(device_t *device, UINT8 command)
{
wd1770_state *w = get_safe_token(device);
if (command & FDC_SIDE_CMP_T)
{
w->head = (command & FDC_SIDE_CMP_S) ? 1 : 0;
if (wd17xx_has_side_select(device))
wd17xx_set_side(device, w->head);
}
else
{
w->head = ~0;
}
}
/* read a sector */
static void wd17xx_read_sector(device_t *device)
@ -1012,10 +1030,7 @@ static void wd17xx_read_sector(device_t *device)
w->data_offset = 0;
/* side compare? */
if (w->read_cmd & 0x02)
w->head = (w->read_cmd & 0x08) ? 1 : 0;
else
w->head = ~0;
wd17xx_side_compare(device, w->read_cmd);
if (wd17xx_find_sector(device))
{
@ -1067,10 +1082,7 @@ static void wd17xx_write_sector(device_t *device)
*/
/* side compare? */
if (w->write_cmd & 0x02)
w->head = (w->write_cmd & 0x08) ? 1 : 0;
else
w->head = ~0;
wd17xx_side_compare(device, w->write_cmd);
/* find sector */
if (wd17xx_find_sector(device))
@ -1173,10 +1185,7 @@ static TIMER_CALLBACK( wd17xx_write_sector_callback )
else
{
/* side compare? */
if (w->write_cmd & 0x02)
w->head = (w->write_cmd & 0x08) ? 1 : 0;
else
w->head = ~0;
wd17xx_side_compare(device, w->write_cmd);
/* attempt to find it first before getting data from cpu */
if (wd17xx_find_sector(device))