INTL 3:770/1 3:770/3   
   REPLYADDR jjlarkin@highlandtechnology.com   
   REPLYTO 3:770/3.0 UUCP   
   MSGID: <9s0nbjt4ggkd85446flpjlj2f0ischvop3@4ax.com> 7bca756d   
   REPLY: <9778be7486d0f9b79e5110596f0b66631ae0ff09.camel@munted.eu> bee7d380   
   PID: SoupGate-Win32 v1.05   
   On Sun, 11 Aug 2024 22:32:38 +0100, Single Stage to Orbit   
    wrote:   
      
   >On Sun, 2024-08-11 at 21:45 +0100, Andy Burns wrote:   
   >> Surprised nobody has mentioned the Pico2 boards (based on RP2350A or   
   >> RP2350B chips, instead of RP2040).   
   >>   
   >> 2x ARM cores plus 2x RISC-V cores (perm any 2 from 4)   
   >> 150 MHz with FPU instead of 133MHz without   
   >> lower power consumption   
   >> more I/O pins (B model only?)   
   >>   
   >> I really ought to buy a couple for tinkering ...   
   >>   
   >> official boards not available yet, but 3rd party boards are, e.g.   
   >>   
   >>    
   >>    
   >   
   >Pimoroni Pico plus 2 is sitting on my desktop ready for me to play with   
   >it.   
   >   
   >This beast also has 16MB of flashram and 8MB of PSRAM. I've also got a   
   >SD card board and some headers I need to solder on to use with it.   
   >   
   >I've got a RISCV baremetal operating system I might bring up on this   
   >device but looking at the datasheet for the RISCV processor used, it's   
   >only got machine mode and user mode, no supervisor mode and no paging.   
   >It does not even support any of the Sv pagetables so that's a   
   >challenge.   
      
   Our computer thinking evolved when CPUs filled rooms and cost   
   megabucks, and RAM cost a dollar per byte. Things have changed.   
      
   Virtual memory worked around the cost of RAM and encouraged complexity   
   and bloat. Similarly, c calling conventions gave us hazards.   
      
   It's time to rethink things. CPUs and RAM are cheap, bloated buggy   
   code is expensive.   
      
   >   
   >Most interestingly enough, you can actually boot up with one RISCV core   
   >and one ARM core, two RISCV cores or both ARM cores. Mixed processor   
   >cores that'll be fun to see what we can do with that.   
      
   In real life, done is better than fun.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)   
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