Pi EEPROM revision

Is there a mailbox command or similar to read the revision date of the EEPROM on the Pi model 4 (this functions in place of BOOTCODE.BIN on the Pi 4)?

*vcgencmd bootloader_version

Is there an equivalent SWI SYS “VHCIQ_Command”,“bootloader_revision” TO ,,,rx% or something of that form so that the result can be put into a buffer without using the horrible kludge *vcgencmd bootloader_version { > <App$Dir>.TempFile } ?

Is there an equivalent SWI

I don’t have the full answer, sorry.

The RISC OS SWI – BCMSupport_SendMBMessage – was easy enough to find, but the Raspberry Pi documentation doesn’t seem to mention the mailbox tag that will query the EEPROM revision.

Yes I found a decription that said ‘TO DO’