747 Rom Emulator / design

[rr]

Dual port ram is really not required. It's expensive and can be
tough to get. Remember that the ecm's bus cycle time is almost
a usec. Some 100 to 150 nsec SRAM can easily be updated
within a part of the cycle.

Another way to look at it is: Does it matter if the ecm goes into
limp when your updating the ram, you can't be driving at
the same time your punching keys on a laptop.

BobR.

<snip>


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