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RaspberryPi designs are not completely open and RISC-V is, right?
by zzz345345 4y ago
RaspberryPi designs are not completely open and RISC-V is, right?
- laweijfmvo 4y agoRISC-V is an open ISA. It doesn't mean you can't build a closed system on RISC-V, nor does it guarantee anything about the firmwares and auxiliary chips (wifi etc).
- snvzz 4y agoRISC-V is an ISA or Instruction Set Architecture. This defines the interface between hardware and software. If software and hardware both follow the specification, then the software will run on the hardware, and the hardware will run the software. Both the hardware and the software could be entirely proprietary and extremely locked up, while compliant, as that'd fall well outside the ISA's scope.
- RobotToaster 4y agoIt's neither. The broadcom SOC closed source, and it doesn't have public documentation. Also it has a videocore core running a proprietary RTOS called microsoft ThreadX that does bootstrapping and some low level hardware stuff.
- intsunny 4y agoHoly moly. Never knew that Microsoft developed and owned ThreadX: https://en.wikipedia.org/wiki/ThreadX#Products_using_it https://en.wikipedia.org/wiki/ThreadX#Products_using_it