| ??? 06/04/10 17:59 Read: times |
#176393 - ports? machine cycle? Responding to: ???'s previous message |
shows when ports are sampled. Usually this relates to a machine cycle
this is not about sampling ports, but about sampling interrupt activating flags. The interrupt flags MAY be 'sampled' each machine cycle, but instruction exccution is (I think with the exception of 1 or 2 'strange' derivatives) not interrupted. you may be right, just the language does not make it sound so. Erik Re 'strange' derivatives,: I vagely recall some uCs (Infineon?) that will interrupt multiply and divide instructions, but not which. Never worked with any such '51s |
| Topic | Author | Date |
| Interrupt Hardware checked on SETB EA? | 01/01/70 00:00 | |
| Yes... | 01/01/70 00:00 | |
| the way to see it | 01/01/70 00:00 | |
| so exactly when does the hardware check the interrupt regs | 01/01/70 00:00 | |
| VERY derivative dependent | 01/01/70 00:00 | |
| Datasheet should tell you | 01/01/70 00:00 | |
| ports? machine cycle? | 01/01/70 00:00 | |
Still the datasheet will say. | 01/01/70 00:00 |