Raspberry Pi 4

The download page does state that RC16 is OK for the RPi4.

I have just tried a new RC16 installation, built with balenaEtcher on the Mac, in the 8GB RPi4 and it ‘just worked’. EtherGENET networking DHCP’d and the monitor lit up sensibly at 1920×1200.

(Without doing it all again I think it is RISC OS Direct that needs updating for the RPi4.)

Hope that helps.

and it ‘just worked’

The same here. But since I have some very small issues, I upgraded the ROM with the latest one.

Looks like the XHCIDriver work for the Pi 4 is now underway

Merge requests for XHCIDriver and HAL_BCM2835 have now appeared.

OS name       : RISC OS 5.27
Build date    : Sat,29 Aug 2020.21:02:37
Platform      : Raspberry Pi 4 Model B

*usbdevices
No. Bus Dev Class Description
  1   1   1  9/ 0 Synopsys DWC OTG root hub
  2   1   2  9/ 0 GenesysLogic USB2.1 Hub
  3   1   3  0/ 0 MOSART Semi. 2.4G Keyboard Mouse
  4   1   4  0/ 0 Logitech  USB WheelMouse     
  5   2   0  9/ 0 Synopsys XHCI root hub
  6   2   1  9/ 0 INTENSO USB2.0 Hub
*

here some results of testing this morning with sprows test rom on a pi4 4Gb
USB Status Report
-———————
Saved Sun,30 Aug 2020.08:45:22 by USBinfo 0.91 (03 Jul 2019)

FS:USB
Bus:1
Device:1
DeviceFS : USB1
USB spec : 2.00
Class : 9 Hub
Subclass : 0 Unused
Protocol : 1 Single TT
MaxPacket : 64
Vendor : 0000 RISC OS
Product : 0000 System root HUB
Release : 1.00
Speed : Hi-speed (480 Mb/s)
NumConfigs: 1

(Name: ASM1051E SATA 6Gb/s bridge, ASM1053E SATA 6Gb/s bridge, ASM1153 SATA 3Gb/
s bridge, ASM1153E SATA 6Gb/s bridge)
Release : 1.00
Speed : Hi-speed (480 Mb/s)
NumConfigs: 1

Additional comments:

this is booting off the rom from the sd card then switching to scsi ssd.
will do some more testing to see how we go.
good work

—
Rob andrews

only see the ssd in the usb2 ports maybe a problem with the usb3 adaptor will have to do some more testing because it works on usb2 sticks but not on usb3 sticks

XHCI is slower than DWC at least according to RISCOSmark.

DWCDriver

HD Read - Block load 8MB file                              34420    1154%
HD Write - Block save 8MB file                             38641    1270%
FS Read - Byte stream file in                                416     200%
FS Write - Byte stream file out                              588     306%

XHCIDriver

HD Read - Block load 8MB file                              29789     998%
HD Write - Block save 8MB file                             28493     936%
FS Read - Byte stream file in                                490     236%
FS Write - Byte stream file out                              500     260%

I shall do some testing on Monday (I have a 4GB Pi4). Great work!

when are we going to be able to build the rom??

also gives an error when you try to run !hform or !systemdisc is this due to an old version os scsifs??

What does the error say?

i think it’s down to having ver 1.35 of SCSIFS in this rom not ver 1.36
it give an abort on
instuction fetch at &FC35CD2C, PC 00000000: registers at 00055EA8

If you want someone else to to torture it, just point the way to a ROM build, or source tree or whatever. I’ll try it on my 8GB RPi4. It’s a bit hard for me to test anything until there’s basic support for at least one type of “normal” USB port because of connector issues. Ie I can’t just go and buy what I need here.
I looks like David Pitt has the 8GB covered anyway. Shame it only seems to detect / be able to use 4GB.

works fine on a pi4 8Gb if you want to try it just download sprows rom build link on git hub,
all 4 ports on th pi work but my USB3 adaptor will only boot from USB2 port.
i tried to build from the source built fine but the XHCIdriver is still dormant so must need a bit of secret sauce to make it work.

Big thanks to Sprow for doing a pre-release version (follow David Pitt’s HAL link). Also working great on my Pi4 8GB with all 4 usb ports working but as Rob reported, USB3 hardrive only working through usb2 ports. The usb3 ports will work with usb2 memory sticks. :-)

i tried to build from the source built fine but the XHCIdriver is still dormant so must need a bit of secret sauce to make it work.

The patches haven’t been merged yet. If you go to the links above you can download the patches and apply them manually.

If you have recent firmware it’s possible to boot into RISC OS without an SD card and have access to the ‘Loader’ partition.

I can comfirm that you no longer need to boot off an sd card just built a new hard disc to test it but arkward had to use an old rom with SCSIFS 1.36 so i could format and run !system disc to put loader on the disc.
i merged the patches but maybe i missed something because it built ok but XHCIDrive was still dormant when i checked on github the link mentioned Blob in the link.

merged the patches but maybe i missed something because it built ok but XHCIDrive was still dormant when i checked on github the link mentioned Blob in the link.

Sounds like the patches didn’t apply. Did you use ‘patch -p1 <3.diff’ and ‘patch -p1 <13.diff’.

!system disc

So it isn’t just me. As it is I have to do the MicroSD card shuffle to make a new Pi MicroSD card. Well, either that or do what you did and use a very old RO install on MicroSD which I keep hanging around for such a task.

I think I’ll wait a day or two. It seems the state of USB is in flux. On this page I’m seeing three different things.

Big thanks to Sprow for doing a pre-release version

Without turning it into an Oscars award speech, I should add that ROOL have been supporting the work by paying for stuff like 8GB test hardware – without which we might not have noticed the missing EEPROM required a firmware change. So anyone who contributes to the General bounty, that’s where (some of) your money went this month.

i think it’s down to having ver 1.35 of SCSIFS in this rom not ver 1.36
it give an abort on instuction fetch at &FC35CD2C, PC 00000000: registers at 00055EA8

Oops, that’s my bad. The source tree I started from was the one I was tracing the infamous SCSIFS borkage which I did by adding a BKPT instruction so I could trap it using JTAG on my Titanium. Your Pi has no JTAG connected so BKPT gives an instruction abort.

Edit 11:37: Uploaded ROM with SCSIFS debug removed.

only see the ssd in the usb2 ports maybe a problem with the usb3 adaptor will have to do some more testing because it works on usb2 sticks but not on usb3 sticks

I should clarify that we’re some way off USB3 support. That’s a whole different kettle of fish to making the ports work with the contemporary USB stack which pre-dates USB3 (circa 2010) and is USB2 & 1 only. You can increase the probability of USB3 on RISC OS by chipping into the USB bounty of course.

reapplied the diffs and everything good now don’t know what i missed the first time.

Have try the Sprows testrom in my PiTopV1 with Pi4. Thanks a lot. Is working good with keyboard and storage devices.
If I use my USB mobile Surfstick, I have access to the microsdcard inside but ComCentre can not establish a connection.
If I use the surfstick via USB C with my Y-cable, I get a connection.
Summary I’m happy with it.

I should clarify that we’re some way off USB3 support.

Do the ports work as USB 1 or 2 still?

1. Start with RC16
2. Replace the ROM

Magic. Well Done

Do the [Pi 4 USB 3.0] ports work as USB 1 or 2 still?

I have my mouse plugged into one of the Pi 4 USB 3.0 ports and it seems to be working fine.

I also have a my FAT32fs Loader files plugged into one of the P1 4 USB 3.0 ports and I can see and edit the files. (and, of course, the Pi hardware boot works from there as well – no SDcard)

Summary I’m happy with it.

Very Happy. Thank You.

I have my mouse plugged into one of the Pi 4 USB 3.0 ports and it seems to be working fine.

Nice. I’m not even convinced RO could do a whole lot extra with USB3.0 without some other structural changes taking place anyway.
So I hate to be that person. At this point in time, where is the best place to grab a build of the ROM? e: I mean now that people all seem to be on the same metaphorical page with the commits.