Question A
$4015 IF-D NT21
$4017 MI-- ----
Focus only on $4015.D6 and $4017.D6.
1. If $4017.D6 is 0, when read $4015, then $4015.D6 return 0 and $4015.D6 set 1.
2. If $4017.D6 is 0, when read $4015, then $4015.D6 return 1 and $4015.D6 set 0.
3. If $4017.D6 is 1, when read $4015, then $4015.D6 return 0 and $4015.D6 set 1.
4. If $4017.D6 is 1, when read $4015, then $4015.D6 return 1 and $4015.D6 set 0.
Which two are right?
Question B
Assume 4015.D0 is set and $4000.D5(length counter halt) is set.
Write $4003, whether reload length counter or not?
Thanks.
$4015 IF-D NT21
$4017 MI-- ----
Focus only on $4015.D6 and $4017.D6.
1. If $4017.D6 is 0, when read $4015, then $4015.D6 return 0 and $4015.D6 set 1.
2. If $4017.D6 is 0, when read $4015, then $4015.D6 return 1 and $4015.D6 set 0.
3. If $4017.D6 is 1, when read $4015, then $4015.D6 return 0 and $4015.D6 set 1.
4. If $4017.D6 is 1, when read $4015, then $4015.D6 return 1 and $4015.D6 set 0.
Which two are right?
Question B
Assume 4015.D0 is set and $4000.D5(length counter halt) is set.
Write $4003, whether reload length counter or not?
Thanks.