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Here's the Spin2 Interpreter, so far:
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This interpreter is for the built-in 17-bit address space (128KB), but can easily be changed to 32-bit XMM. I started out on the 32-bit addressing path, but figured it was more practical, at first, to make a native 17-bit version, as an external SDRAM can easily be managed by Spin code for huge data.
This interpreter leaves the first $150+ longs in the cog free for in-line assembly code and terminate-stay-resident type applications which can run concurrently with the interpreter via hardware multi-tasking.....