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Re: PiStorm Chat
Posted: 02 Oct 2023 18:03
by LarryL
Hi,
I have just ordered a PiStorm to try this with my H5 board
Will be an interesting experience…
AFAIK this is an ongoing development for the ST
@dad664npc read somewhere, that you would be happy with some more testers :-)
Unfortunately I will be of no use as a developer (can solder a lot, but I am really bad with SW and coding)
One short question re the PI4 - what RAM size should I use? Is 2G enough?
Regards
Michael
Re: PiStorm Chat
Posted: 02 Oct 2023 18:31
by PhilC
I’ve got a PiStorm here too but not had time yet to try it out. I also pre ordered a Pi5, wonder what sort of results that would give. Won’t find out till 2024 though when it arrives.
Re: PiStorm Chat
Posted: 02 Oct 2023 18:47
by alexh
PhilC wrote: 02 Oct 2023 18:31
I also pre ordered a Pi5, wonder what sort of results that would give. Won’t find out till 2024 though when it arrives.
They are not compatible with PiStorm. The GPIO controller has completely changed compared to previous RPi
Re: PiStorm Chat
Posted: 02 Oct 2023 19:11
by PhilC
alexh wrote: 02 Oct 2023 18:47
PhilC wrote: 02 Oct 2023 18:31
I also pre ordered a Pi5, wonder what sort of results that would give. Won’t find out till 2024 though when it arrives.
They are not compatible with PiStorm. The GPIO has completely changed compared to previous RPi
Are you sure? It says standard 40 pin GPIO header? It does have a lot of other I/O too though.
Re: PiStorm Chat
Posted: 02 Oct 2023 19:19
by alexh
PhilC wrote: 02 Oct 2023 19:11
Are you sure? It says standard 40 pin GPIO header?
100% they changed the GPIO controller for a new PCIe based core in their new Southbridge. Same I/O, same pinout, but not software compatible. I'm hearing stories of high latency making it unsuitable for things like PiStorm IRQ. Also no SMI
Re: PiStorm Chat
Posted: 02 Oct 2023 19:27
by PhilC
@alexh that's an interesting decision by them then. I’ll stick to using one of my Pi4s then
Re: PiStorm Chat
Posted: 02 Oct 2023 19:58
by Steve
@LarryL 2GB is fine. It even runs at 1GB on a Pi3 now, just not as fast as a pi4 of course. Feel free to join the Pistorm discord, we're in #atari channel.
Re: PiStorm Chat
Posted: 02 Oct 2023 20:09
by LarryL
Steve wrote: 02 Oct 2023 19:58
@LarryL 2GB is fine. It even runs at 1GB on a Pi3 now, just not as fast as a pi4 of course. Feel free to join the Pistorm discord, we're in #atari channel.
Thanks Steve, will order the 2Gig version
Not used to discord yet - tried the invitation link from the GitHub on my iPad, but safari complained that it could not open it
Will try from a desktop computer tomorrow
Re: PiStorm Chat
Posted: 02 Oct 2023 22:34
by alexh
PhilC wrote: 02 Oct 2023 19:27
@alexh that's an interesting decision by them then.
Higher latency, but 2x bandwidth.
https://www.raspberrypi.com/news/introd ... erry-pi-5/
All other I/O functions are offloaded to a separate I/O controller, implemented on an older, cheaper process node, and connected to the AP via PCI Express. RP1 is our I/O controller for Raspberry Pi 5, designed by the same team at Raspberry Pi that delivered the RP2040 microcontroller, and implemented, like RP2040, on TSMC’s mature 40LP process. It provides two USB 3.0 and two USB 2.0 interfaces; a Gigabit Ethernet controller; two four-lane MIPI transceivers for camera and display; analogue video output; 3.3V general-purpose I/O (GPIO); and the usual collection of GPIO-multiplexed low-speed interfaces (UART, SPI, I2C, I2S, and PWM). A four-lane PCI Express 2.0 interface provides a 16Gb/s link back to BCM2712.
Re: PiStorm Chat
Posted: 02 Oct 2023 22:50
by exxos
alexh wrote: 02 Oct 2023 22:34
Higher latency, but 2x bandwidth.
Doesn't that equal no gain then :lol: :hide: