Here I would like to showcase a read only memory (ROM), where information is stored in shulker boxes and chest minecarts.

The data is read 8 bit at a time. Water bottles are considered a "zero", whereas other unstackables are read as a "one". A shulker box can contain up to 3 byte of data and a chest minecart up to 81 byte of data. After reading the data, the shulker boxes/minecarts are returned unchanged, so that the information can be re-read.

The data ROM can be used, for example, to store pictures for a display.
I plan to use to the read only memory to run different apps/programs in my minecraft CPU.