Email: Password: Remember Me | Create Account (Free)

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
???
03/31/09 14:43
Read: times


 		 #164064 - Compare ISR for 8051 with 8080
Responding to: ???'s previous message
The 8051 is an old microcontroller.

But do locate the descriptions for an old 8080 processor, and count the number of instruction cycles that it takes to enter an interrupt.

Compare this with the number of cycles the 8051 needs.

One of them is a microcontroller. One is not. What is your view of the differences between 8051 or 8080 ISR handlers?

If you don't find good info about the 8080, you may take the newer 16-bit 8086 instead. The comparison will be meaningful as to the design differences between an old microcontroller and an old microprocessor from the same manufacturer.

List of 29 messages in thread
TopicAuthorDate
Register Bank Concept In 8051            01/01/70 00:00      
   Reg Banks            01/01/70 00:00      
      General??            01/01/70 00:00      
   Deja vu?            01/01/70 00:00      
      Compare ISR for 8051 with 8080            01/01/70 00:00      
      It's legacy from 8048            01/01/70 00:00      
         that just shifts the question...            01/01/70 00:00      
         "Legacy" is not necessarily bad            01/01/70 00:00      
   this is really about ....            01/01/70 00:00      
      Microprocessors respond quickly too            01/01/70 00:00      
         but will need a lot of pushes and pops            01/01/70 00:00      
            PUSHA and POPA            01/01/70 00:00      
         8086 not an X86            01/01/70 00:00      
            It was, at the time ...            01/01/70 00:00      
               80C186EB            01/01/70 00:00      
                  all???            01/01/70 00:00      
                     All 8031s            01/01/70 00:00      
                        verbiage            01/01/70 00:00      
                           Bad Grammar            01/01/70 00:00      
                              preposition 'in' required I feel            01/01/70 00:00      
                                 Good at            01/01/70 00:00      
                                    ok            01/01/70 00:00      
                                    Good with            01/01/70 00:00      
                                       Bad Grammer II            01/01/70 00:00      
                                          I'm very sorry to hear...            01/01/70 00:00      
                                          In the words of Professor Henry Higgins            01/01/70 00:00      
                                             do you have any ? :)            01/01/70 00:00      
                                                You're right ... those OLD books are all in Latin or Aramaic            01/01/70 00:00      
                                       Maybe...            01/01/70 00:00      

Back to Subject List