5 ms·
I wonder if you could run the firmware in emulation on a more recent CPU.
by pbourke 5y ago
I wonder if you could run the firmware in emulation on a more recent CPU.
- baybal2 5y agoI don't think one can even fund assembler docs for a chip so old, rare, and obscure as first SH-1,2,3 families.
- pbourke 5y agoI don’t know anything about these, but found it interesting that people have ported Linux to these chips as they’ve come off patent: https://en.m.wikipedia.org/wiki/SuperH#J_Core https://en.m.wikipedia.org/wiki/SuperH#J_Core
- baybal2 5y agoThat is for much more recent, and bigger cores. The one I talk about has a kilobyte of ROM, and is an original SuperH from early nineties.
- AlotOfReading 5y agoThis is a weird comment. One of the key features of the SuperH ISA is that it's more or less backwards compatible. I worked on them in the 00s/10s, but I can't imagine they had an entirely different ISA in the 90s. I also know that commercial SH3 emulators exist because I've used them. Heck, Renesas used to ship one with the toolchain.
- baybal2 5y agoI'm surprised to hear this, maybe trying to salvage the old binary might have had some sense, but the client already went for a complete re-engineering, recognising the low availability of this rare chip as a great threat.
- AlotOfReading 5y agoYeah, they definitely got rare in the normal supply chain. I'd be surprised to see one in anything other than a japanese design today.