Re: Spectrum Next
I've given you an upvote for that mention of the Spectrum Next
It might be one of the few computers you might be able to buy that doesn't have an Intel ME, AMD Secure Processor (née PSP), or ARM TrustZone in it (unless you upgrade it with the Raspberry Pi Zero co-processor*).
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*Yes, really - "We added the option to add a Raspberry Pi Zero as a slave co-accelerator board, taking the Spectrum Next to a whole new level. In other words, with a Raspberry Pi Zero slotted into its place, the Spectrum Next can use the RPi memory, CPU and GPU to do its bidding" So an Z80-on-FPGA running at 28 Mhz with up to 2 MB RAM can have an RPi BCM2835 (ARM1176 (includes ARM TrustZone)) running at 1 GHz with 512 MB RAM as a co-processor. <Blink-with-raised-eybrows>