So, which devices/ports are bootable?

[Grench]

I didn't want to further clog the news post with this side conversation.

Pyra has lots of ports & card slots. Which ones can it boot from in the current SoC board revision?

eMMC = yes
microSDXC = yes
left SDXC = yes
right SDXC = ?
eSATA = ?
microUSB 3.0 OTG = ?
left USB 2.0 = ?
right USB 2.0 = ?
microUSB charging/serial port = ? (unlikely...)
WiFi network adapter = ? (unlikely, but there are computers that can netboot so it's in this list)
HDMI = no

Can it boot from a USB stick plugged into either of the USB ports?
How will this be handled with telling it which one to boot from? Magic menu accessed via special keys held at boot? Which ones?

 

[levi]

Why do you need to know this? It doesn't work like x86 PCs where you tend to boot from a live image then use that to master the internal discs, ARM Linuxes thus far have almost always needed another computer to prepare a card. I guess that might change in the future, but probably not in the Pyra's lifetime.

 

[TrashyMG]

ROM can load the bootloader from eMMC and the primary SD slot. The bootloader (u-boot) can boot from pretty much anything.

https://pyra-handheld.com/boards/threads/quite-a-bit-for-you-to-read.80096/page-6#post-1409236

As in as long as a valid u-boot is in the eMMC or primary SD card slot it can pretty much boot off any device.

 

[Grench]

Why do you need to know this?

Pure curiosity?

 

[Akko]

It can't boot from HDMI? Damn it, that was my main reason for getting one!

 

[CommanderB]

In theory there is Ethernet via HDMI, so there could be a weird way to boot!

Gesendet von meinem SM-N9005 mit Tapatalk

 

[Akko]

In theory there is Ethernet via HDMI, so there could be a weird way to boot!

Gesendet von meinem SM-N9005 mit Tapatalk

Yeah that came to me too after I posted XD

 

[Letalis Sonus]

In theory there is Ethernet via HDMI, so there could be a weird way to boot!

Don't expect any additional HDMI features to be supported, you'll most likely get a dumb video/audio out port that doesn't support anything else.

 

[lukey]

left SDXC in JTAG mode = yes

 

[Djhg2000]

Don't expect any additional HDMI features to be supported, you'll most likely get a dumb video/audio out port that doesn't support anything else.

Actually DDC is basically an I²C bus so theoretically you could store something on an I²C attached flash chip. Those chips typically come in at a few megabytes tops and it's probably super inconvenient to boot a handheld device from an external monitor, but that's not the point.