To answer a few of questions I've received in PM's from various people, and because I'm just too busy to make a video right now, I'll answer some of the questions here.
Yes, the old 4A/DOS on WHTECH is 'nearly functionally the same' as the new cartridge version of 4A/DOS, with a couple of exceptions.
1) The cartridge version has CHARA1 built-in, so there is no need to put copies
of it on multiple diskettes or in image files.
2) The cartridge version automatically returns to DOS upon exiting a program,
so you don't have to manually and repeatedly go through the title and cartridge selection screens.
Some of the things I like about the auto-booting 4A/DOS Cartridge:
1) As already mentioned, it bypasses the title and cartridge selection screens, saving time and freeing
one from extra repetitious and unneeded keystrokes that slow a person down.
One can design their menus or startup screens however they wish and expand them endlessly.
Most programs limit how many selections you can have or the format in which they are presented.
3) Eliminates excessive typing, even automating some procedures, like loading of EA/3's.
4) Long path statements supported
When using TIPI or another storage device that allows for sub-directories, 4A/DOS allows
for long file paths which most programs are unable to accommodate.
4) Runs in 80 Columns
I prefer to see as much on the screen at one time as possible and do not like to skimp on details.
Someone asked why an UberCart and not a FinalGROM?
Well, in cartridges like the SuperCart, FlashROM or FinalGROM, you cannot bypass the TI menu or cartridge selection screens. So whenever you exit a program, you essentially get 'kicked out' of the DOS environment and have to re-enter, which is a pain (at least to me). With this auto-booting version, there is no need to use or write special "re-entrant programs", (like the few obsolete ones that originally came with it).
The chip labeled "START" is the "KEY" to it's operation and it works with the slightly modified version of 4A/DOS on the other chip.
I hope this answers your questions. If I ever do get around to making a video on this, it's months away.