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???
02/11/07 16:00
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 		 #132524 - Yes, but, still, why dismiss ROM?
Responding to: ???'s previous message
but I want to be able to program my system containing an 80C51BH, 32K EEPROM (28C256), and 8K SRAM without removing the chips.

Ok, now, if I understand correctly: you have a part of your design where you have address lines coming in and data lines coming out. In-between address and data lines is your 'hardware rom'? Right?

Ok, now - I don't understand why you insist that this part of system should be 'hardware rom' and not some kind of ROM? Because all that apply to your 'hardware ROM' in terms of execution and logical function should be the SAME as for your real ROM part, and you can even change it if you need?

If, however, you insist on building 'hardware rom' which is not so complicated for 64 bytes, then go on, in my previous post, you have steps you need to build one...

Best, luck,
CN

List of 99 messages in thread
TopicAuthorDate
new plan. RE: 8051 SBC/PGMR            01/01/70 00:00      
   Make a front panel            01/01/70 00:00      
      clock needed.            01/01/70 00:00      
         in \"the bible\" there is a discussion of the \"once            01/01/70 00:00      
            think about this            01/01/70 00:00      
               That's how early MCU's were prototyped            01/01/70 00:00      
   FPGA software            01/01/70 00:00      
      Maybe not just yet ...            01/01/70 00:00      
         Logic minimisation            01/01/70 00:00      
      hmm...            01/01/70 00:00      
         Complicate things?            01/01/70 00:00      
            I have guts ;-)            01/01/70 00:00      
               guts?... maybe, but what about brains?            01/01/70 00:00      
         development            01/01/70 00:00      
            what i mean is...            01/01/70 00:00      
               Where's the directory? Where's the FCB, and FAT?            01/01/70 00:00      
         Reality vs perception            01/01/70 00:00      
   Back to basics, ... not BASIC!            01/01/70 00:00      
      .            01/01/70 00:00      
         comments            01/01/70 00:00      
            Erik ... you've struck a nerve ...            01/01/70 00:00      
               if you, just for once, would take the time to read            01/01/70 00:00      
                  So ... where's the help for him in that example?            01/01/70 00:00      
                     right there            01/01/70 00:00      
                        Front panel            01/01/70 00:00      
                     But...            01/01/70 00:00      
               Nerves            01/01/70 00:00      
                  You're right about that ...            01/01/70 00:00      
                     BINGO!            01/01/70 00:00      
                        So why not use a PROM?            01/01/70 00:00      
            did you visit here before?            01/01/70 00:00      
               ISP is not special!            01/01/70 00:00      
         Simple            01/01/70 00:00      
         Why not using an ISP-micro?            01/01/70 00:00      
   Why dismiss rom?            01/01/70 00:00      
      .            01/01/70 00:00      
         Yes, but, still, why dismiss ROM?            01/01/70 00:00      
   Sooooooooooooooooooooooooooooooooooooo complicated            01/01/70 00:00      
      That's an understatement ...            01/01/70 00:00      
         Aren't you doing an Erik now?            01/01/70 00:00      
            It's because I'm confused ...            01/01/70 00:00      
      no            01/01/70 00:00      
         but you said you already have a programmer            01/01/70 00:00      
   KISS, and one step at a time            01/01/70 00:00      
      KISS: alreay been said.            01/01/70 00:00      
   plan vs No_idea            01/01/70 00:00      
   Mike ... It looks as though you want ...            01/01/70 00:00      
      .            01/01/70 00:00      
         It looks as though you have some thinking to do.            01/01/70 00:00      
         Yes, a lot of thinking to do!            01/01/70 00:00      
            why do you worry about that?            01/01/70 00:00      
               Mark this on your calendar! ... Erik and I agree!            01/01/70 00:00      
   Mike - Time to fess up...            01/01/70 00:00      
      I kind of agree            01/01/70 00:00      
   not guts but folly            01/01/70 00:00      
   RE: Free Chips            01/01/70 00:00      
   I give up seeking help here            01/01/70 00:00      
      Because what you plan to do is just idiotic!            01/01/70 00:00      
      good plan!            01/01/70 00:00      
         Bootloader project gone bad            01/01/70 00:00      
            ...            01/01/70 00:00      
               Instead of the mishmash you propose, how about one            01/01/70 00:00      
                  Homework            01/01/70 00:00      
                     if it is, then whoever assigned it is crazier tha            01/01/70 00:00      
                        IT IS NOT HOMEWORK            01/01/70 00:00      
                           really?            01/01/70 00:00      
               16 bytes? Are you sure?            01/01/70 00:00      
      He who laughs last...            01/01/70 00:00      
         let me reword my question one step at a time            01/01/70 00:00      
            Guts            01/01/70 00:00      
            I don't get it Mike            01/01/70 00:00      
               here's the code again            01/01/70 00:00      
                  Mike please read good plan post            01/01/70 00:00      
                  Try to go back to reality, Mike ...            01/01/70 00:00      
                     It looks like he is trying to do minimisation            01/01/70 00:00      
      Sorry know one can help            01/01/70 00:00      
         blatant errors in syntax            01/01/70 00:00      
            Come on, Richard...            01/01/70 00:00      
      The CrazyROM            01/01/70 00:00      
         Agreed            01/01/70 00:00      
         CrazyRom(tm)            01/01/70 00:00      
            It is already taken...            01/01/70 00:00      
               Mike Stegmaier, I found the solution            01/01/70 00:00      
         Blast from the past            01/01/70 00:00      
         welcome back Michael Karas, we missed you            01/01/70 00:00      
            ade7756 interface with 89c51 urgent code needed            01/01/70 00:00      
               Why post that in THIS thread?            01/01/70 00:00      
               Not only is it entirely irrelevant to this thread            01/01/70 00:00      
         Thanks All            01/01/70 00:00      
            Warm welcome, Michael!            01/01/70 00:00      
            Cross-post            01/01/70 00:00      
            Link            01/01/70 00:00      
            Micheal Karas            01/01/70 00:00      
               that ois why there is 'stuff' around the            01/01/70 00:00      
   History lesson            01/01/70 00:00      
      ROM Reliability            01/01/70 00:00      
         high failure rate            01/01/70 00:00      
            Out of Market. Hmmm            01/01/70 00:00      
               Not SLOW, but slower ...            01/01/70 00:00      

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