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???
11/28/08 07:53
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 		 #160357 - why not?
Responding to: ???'s previous message
Andy Neil said:
If the biggest RAM size possible is your overriding concern, then the MCS-51 is certainly not the best architecture to go for.
Nor any other 8-bit architecture.

Why not?

As long as there is no specified access speed (whatever it may mean), you can attach to an 8-bitter as much RAM as you want, and it's still trivial to access. In fact, 8-bit microcomputers of the "golden era" (80s) usually had 64-128kB of RAM. Recall, that the original PC had 8-bit wide data bus, and only a few claimed that 640kB would be too much... ;-)

JW


List of 35 messages in thread
TopicAuthorDate
Need bigger RAM            01/01/70 00:00      
   find out here            01/01/70 00:00      
   MCS-51 is the best            01/01/70 00:00      
      Not for BIG RAM!            01/01/70 00:00      
         why not?            01/01/70 00:00      
            Disagree            01/01/70 00:00      
            Address range does matter            01/01/70 00:00      
               still, why not            01/01/70 00:00      
                  while I agree with Per, here is a nugget for Jan            01/01/70 00:00      
                     Large data:: Yes, large RAM: Watch out            01/01/70 00:00      
                     particular application of OP, not yours, matters            01/01/70 00:00      
                        And the best is...            01/01/70 00:00      
                        but added complexity equals likely more buggy            01/01/70 00:00      
                  "best" is the key.            01/01/70 00:00      
                  Addressing modes do matter            01/01/70 00:00      
               Why would anyone use THAT architecture?            01/01/70 00:00      
                  Helps to check context before reacting            01/01/70 00:00      
                     It is the architecture and not the brand            01/01/70 00:00      
                        Sorry if unclear            01/01/70 00:00      
            Quick PC history            01/01/70 00:00      
               engineering insight            01/01/70 00:00      
                  What was your point?            01/01/70 00:00      
            Possible to 16Mbyte            01/01/70 00:00      
      I use MCS51            01/01/70 00:00      
         So why didn't you say that in the first place?            01/01/70 00:00      
            The universal truth again            01/01/70 00:00      
               64kB RAM?            01/01/70 00:00      
                  Both            01/01/70 00:00      
                     don't be deceived by Keil's database            01/01/70 00:00      
                        Good to know            01/01/70 00:00      
         '51 vs '52            01/01/70 00:00      
         even with AT89C2051 can be done            01/01/70 00:00      
   ... and the BIGGEST is...            01/01/70 00:00      
      Is that RAM on-chip?            01/01/70 00:00      
      Maybe biggest, but BEST?            01/01/70 00:00      

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