How to edit Epson Expression Premium XP-700, XP-600 firmware?

Question

Adobe Photoshop

I have 3 printers of these models. I want to reset the printer-MFP settings.
Question: "How to remove the lock when there is no ink and cartridges?"
Of course, I can pour distilled water into the CISS or PZK. But I have defective cartridges - one out of five is already on 3 CISS. All different. This is marriage.
I don't want to spend money on CISS anymore.
The decision will be in the PZK. There is no money for them yet and they have reduced it.
I'd like to make a few changes to the flatbed printer program.
The first is to remove the lock, the
second is to remove the margins when printing from a flash drive (it does not print all the photos with margins), the
third is to add photo effects, the same as when shooting.
Working with the finished image is easier than when photographing. And about work - about how to do this is approximately described in an article about the Canon technique.
Only I don’t know, for example, how to decrypt the firmware, how to replace it, what kind of editor is needed.
In general, I can not even install the MFP on a PC.

Answer 1

Adobe Photoshop is not used for these purposes, but I recommend using vector editors (Adobe Illustrator + astutegraphics.com otherwise you will suffer) and then import the shapes into Adobe Photoshop if necessary.

Answer 2

For such lines, vector editors usually use: Inkscape, CorelDRAW, etc.

Answer 3

path then path -> stroke

Answer 4

If you have enough knowledge to work with the firmware of these devices, then you would not have such a question. And even more so, there would be no thoughts about launching some kind of game on this platform. And since you don’t understand anything about this, no one will be able to teach you what you need in the question / answer format. These are years of study, and a lot of information that needs to be shoveled on each specific platform.
So the simplest answer to your question is that you simply won't get anything out of it with this approach.