SPI setup 2 devices, Pi 4

[Robin57159]

I have linked a couple of references in the following thread:

Raspberry rpi spi bus want t

does the raspberry pi have an spi bus gpio pins on the board if so can some body pls inform me of the bot the tx rx pins and power range sported i have i think a 16 Mb add on memory board that runs on the spi bus lines… i may be able to provide with help a programmable boot loader that you can text mode select at boot the sd-card or any usb port …also with the correct support nay be able to choose between booting of either the usb-2 port s or the usb 3 ports, this all may be possible …