| ??? 02/16/01 18:59 Read: times |
#9404 - RE: What does this line do ?? |
The first instruction resets the four highest bits of the accu to "0".
The second takes the LATCH VALUE of P1 (the last value you wrote to it, not the levels on the input pins!), makes the highest bits "0", and puts that value back in P1. This is called a read-modify-write instruction. At least, that's what I remember. |
| Topic | Author | Date |
| What does this line do ?? | 01/01/70 00:00 | |
| RE: What does this line do ?? | 01/01/70 00:00 | |
| RE: What does this line do ?? | 01/01/70 00:00 | |
| RE: What does this line do ?? | 01/01/70 00:00 | |
| RE: What does this line do ?? | 01/01/70 00:00 | |
RE: What does this line do ?? | 01/01/70 00:00 |