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wd_fdc: check if the timer for sector register update is already

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running, fixes bbc format command
This commit is contained in:
Dirk Best 2015-05-27 15:29:00 +02:00
parent 2e772fb160
commit efb22342e3
1 changed files with 5 additions and 1 deletions
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6
src/emu/machine/wd_fdc.c
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@ -1130,7 +1130,11 @@ void wd_fdc_t::sector_w(UINT8 val)
// return; // return;
sector_buffer = val; sector_buffer = val;
delay_cycles(t_sector, dden ? delay_register_commit*2 : delay_register_commit);
// set a timer to write the new value to the register, but only if we aren't in
// the middle of an already occurring update
if (!t_sector->enabled())
delay_cycles(t_sector, dden ? delay_register_commit*2 : delay_register_commit);
} }
UINT8 wd_fdc_t::sector_r() UINT8 wd_fdc_t::sector_r()