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floppy.cpp: as_ticks returns a u64, so go unsigned all the way

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AJR 2021-01-25 10:19:04 -05:00
parent cc03eb3b03
commit 0feb608c6c
1 changed files with 1 additions and 3 deletions
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4
src/devices/imagedev/floppy.cpp
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@ -932,9 +932,7 @@ attotime floppy_image_device::get_next_transition(const attotime &from_when)
return cache_end_time; return cache_end_time;
// Put a flux transition in the middle of a 4us interval with a 50% probability // Put a flux transition in the middle of a 4us interval with a 50% probability
int64_t interval_index = (from_when - cache_weak_start).as_ticks(250000); uint64_t interval_index = (from_when < cache_weak_start) ? 0 : (from_when - cache_weak_start).as_ticks(250000);
if(interval_index < 0)
interval_index = 0;
attotime weak_time = cache_weak_start + attotime::from_ticks(interval_index*2+1, 500000); attotime weak_time = cache_weak_start + attotime::from_ticks(interval_index*2+1, 500000);
for(;;) { for(;;) {
if(weak_time >= cache_end_time) if(weak_time >= cache_end_time)