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???
04/08/05 22:43
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 		 #91270 - bootrom code
Responding to: ???'s previous message
I read out the bootcode at FC00h-FFFFh, will this work if I burn it into an EPROM (and setting /EA to 0 and having ORG 0: LJMP 0FC00h)?

I need to dig out some board with external program memory... or wire up one... really getting curious...

Jan Waclawek

List of 34 messages in thread
TopicAuthorDate
Philips p89c51RDx Programmer project            01/01/70 00:00      
   Useful Project            01/01/70 00:00      
   Useful Project. Count me in            01/01/70 00:00      
      lets try something....            01/01/70 00:00      
         No Go            01/01/70 00:00      
            see my "other things.."            01/01/70 00:00      
               bootrom code            01/01/70 00:00      
                  Jan, please email me at .....            01/01/70 00:00      
                  BootRom Code            01/01/70 00:00      
                     Boot ROM address range            01/01/70 00:00      
                        2kb boot code            01/01/70 00:00      
                           B oot from External Memory            01/01/70 00:00      
                              !EA/Vpp            01/01/70 00:00      
   why not the simple solution: NoTouch            01/01/70 00:00      
      Too Late            01/01/70 00:00      
         Try this, it has worked for some            01/01/70 00:00      
   Philips's angwer            01/01/70 00:00      
      the most often changed            01/01/70 00:00      
      an RX2 'fix' from the horse's mouth...            01/01/70 00:00      
         neat            01/01/70 00:00      
         Nice!            01/01/70 00:00      
            I'll look tomorrow...            01/01/70 00:00      
               I take it back            01/01/70 00:00      
                  you're NOT as stupid as you think.......            01/01/70 00:00      
         Not possible !!!            01/01/70 00:00      
            respectfully disagree...            01/01/70 00:00      
               Re: respectfully disagree...            01/01/70 00:00      
                  I didcussed it above earlier today...            01/01/70 00:00      
               difference Philips.vs.Atmel            01/01/70 00:00      
                  other things...            01/01/70 00:00      
                     lets make the ckt even simpler...            01/01/70 00:00      
                     maybe ?            01/01/70 00:00      
                        using the EA pin            01/01/70 00:00      
               which bits            01/01/70 00:00      

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