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motorola:68000 [2015/02/22 21:30] – [Visualisation] sarayanmotorola:68000 [2025/08/04 21:24] (current) – external edit 127.0.0.1
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 +FIXME: think data got moved here? https://og.kervella.org/m68k/
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 ====== Die shots ====== ====== Die shots ======
   * [[http://dspnet.fr/~galibert/m68k/original|Original images]]   * [[http://dspnet.fr/~galibert/m68k/original|Original images]]
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 At the center two inverters are looped to keep the value.  Two independant vertical busses a and d are used for both reading and writing.  Reading is done by letting the bus float and connecting the memory to the bus with the a ctrl or the d ctrl line.  Writing is done by locking a value first on the bus then afterwards connecting the memory bit to the bus. At the center two inverters are looped to keep the value.  Two independant vertical busses a and d are used for both reading and writing.  Reading is done by letting the bus float and connecting the memory to the bus with the a ctrl or the d ctrl line.  Writing is done by locking a value first on the bus then afterwards connecting the memory bit to the bus.
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 +====== References ======
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 +  * Die revs: http://siliconprawn.org/media/motorola/motorola_high-performance_internal_product_portfolio_overview.pdf
 +  * Early die revs: https://books.google.com/books?id=kSDVBwAAQBAJ&pg=PA297&lpg=PA297&dq=mc68000+r9m&source=bl&ots=4BaXtdA_QH&sig=u8NOvZCee11l-q4PyF9jsElxanw&hl=en&sa=X&ei=HgluVciGB4W1sATrzILwDA&ved=0CDMQ6AEwAw#v=onepage&q=mc68000%20r9m&f=false
 +    * J5H was first silicon, R9M was second
  
motorola/68000.1424640607.txt.gz · Last modified: 2015/02/22 21:30 by sarayan