Hello.
I want to address my questions directly to the Bridgetek team.

Question 1.
Espressif has produced the SPI PSRAM recently. It is 64Mbit in size and could make a great option for RAM_G extension.
Is it possible to use it with BRT81x?
The PSRAM has a partly compatible to SPI Flash generic command set, it has QSPI mode, but the detect may be complicated because ID commands differ. I'm afraid that CMD_FLASHATTACH will simply fail with PSRAM.
I would greatly appreciate the authoritative comment on this.

Question 2.
Is it possible to modify or recompile the blob to create an own version for custom purposes? E.g. the case above needs 8 dummy cycles for PSRAM to read in QSPI fast mode.
What is blob format? Is it an executable code or a set of parameters? I couldn't find any info on this in the official documentation.
Could you please clarify these aspects?

Thank you in advance.