| ??? 05/23/03 07:17 Read: times |
#46456 - RE: Is there any bit addresable 8255? Responding to: ???'s previous message |
NO of course!!
8255 is an external device maped as a memory and the the only instructions aviable are movx @dptr,a and movx a,@dptr. So if you need or want to use addreseable bit: . Search a derivate with more IO ports . Copy the registers of the 8255 in to the internal ram, read/modify the bits, write the registers again in the 8255. |
| Topic | Author | Date |
| Is there any bit addresable 8255? | 01/01/70 00:00 | |
| RE: Is there any bit addresable 8255? | 01/01/70 00:00 | |
| RE: Is there any bit addresable 8255? | 01/01/70 00:00 | |
| RE: Is there any bit addresable 8255? | 01/01/70 00:00 | |
| RE: Is there any bit addresable 8255? | 01/01/70 00:00 | |
| RE: Is there any bit addresable 8255? | 01/01/70 00:00 | |
| RE: Is there any bit addresable 8255? | 01/01/70 00:00 | |
| RE: Is there any bit addresable 8255? | 01/01/70 00:00 | |
| RE: Is there any bit addresable 8255? | 01/01/70 00:00 | |
RE: Is there any bit addresable 8255? | 01/01/70 00:00 |



