24 Jun
2013
24 Jun
'13
10:31 a.m.
On Mon, 24 Jun 2013, Mouse wrote:
Only if you insist on the network-loaded bits being identical to the
bits stored in the PROM.
Hmm. Right.
Dates to 1995. :)
Just a
shot in the dark, but the cheapest copy protection is to flip
some bits on the data bus. [...]
That's possible, but the image is loaded via
MOP or tftp...so that'd
either require instructions to flip the bits or an executable to flip
them, no? > Usually,
nobody wasted the money to copy the ROM into an expensive
> SRAM to run it ...
Perhaps not back in the day, but it's not uncommon now. I have an SMC
switch which does that - which decompresses its flash-stored image into
RAM for operational use. Of course, anything using a 6800 as its main
CPU probably does go back that far....
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