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Casio Prizm/FX Development & Programming :: RE: Notes on Prizm CPU features and optimization

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Author: AHelper
Posted: 11 Dec 2012 06:13:01 pm (GMT -5)

KermMartian wrote:
AHelper wrote:
Just remember: You are looking at the datasheet for the SH7724, not the SH7305. The CPUs don't match hardware peripherals all of the time. Most likely Casio removed all non-essential hardware. It is unlikely that the Prizm has a JPU because why bother paying $$$ for hardware when you can use FOSS? The same goes with the FPU. Why spend money if you can use something like GMP?
On the other hand, it might be easier to just leave some of the IPs in rather than having to go through the trouble of taking them out, to play devil's advocate. Tari, this is a great piece of documentation, and I hope it will soon either be linked from the wiki or copied there. Smile
Note that it is likely that they created the core and just chose the peripherals to use. (Either you buy a pre-made CPU or you choose the core and peripherals and such).

Also, how would one execute instructions outside of ROM? I was trying to execute from RAM and recall that this was an issue before. Does anyone know if this issue was resolved?
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