On Wed, Jan 13, 2021 at 01:02:20PM +0100, Linus Walleij wrote: > On Wed, Jan 13, 2021 at 11:27 AM Andy Shevchenko > <andy.shevche...@gmail.com> wrote: > > On Mon, Jan 11, 2021 at 11:55 AM David Laight <david.lai...@aculab.com> > > wrote: > > > > basically 486 but have a few extra instructions - probably just cpuid > > > and (IIRC) rdtsc. > > > Designed for low power embedded use they won't ever have been suitable > > > for a desktop - but are probably fast enough for some uses. > > > I'm not sure how much keeping 486 support actually costs, 386 was a > > > PITA - but the 486 fixed most of those issues. > > > > Right, we have "last of mohicans" (to date) Intel Quark family of CPUs > > (486 core + few i586 features). > > This is for the embedded world and probably not for powerful use. > > What is the status of PC/104? > https://en.wikipedia.org/wiki/PC/104 > > I have three GPIO drivers for PC/104 machines and these are for > embedded industrial usecases. I am curious about what CPUs these > beasts run on in practice? Are they getting upgraded? > > Paging William, I think he work on these daily. > > Yours, > Linus Walleij
I don't really see pure PC/104 systems around that much anymore, but there are still plenty of PC/104-Plus and PCI-104 setups in production. The PC/104 form factor is popular because users can stack PC/104 compatible modules easily together to build custom solutions; see for example the diagram on this page: https://www.advantech.com/embedded-boards-design-in-services/embedded-single-board-computers/pc104-and-pc104-plus As far as the CPU is concerned, these systems are typically for industrial applications and run CPUs geared for low-power consumption -- you're looking at processor series such as the Intel Bay trail (https://www.winsystems.com/product/epx-c414/), DMP Vortex86DX (http://www.diamondsystems.com/products/helios), and AMD G-series (https://www.advantech.com/products/1-2jkltu/pcm-3356/mod_0706f4d5-2e44-473a-a7b7-53bd1a7bd1a0). TLDR; PC/104 is certainly a niche market focused on industrial consumers, but the form factor and devices are still popular and upgraded reguarly. William Breathitt Gray
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