Thanks to all of the above, for the information provided in this thread, so far.
I picked up another Mega STe, recently. It's really nice-looking, and, evidently, works well.
Unfortunately, there is no hard disk in there. My other Mega STe came with some hard drive in it. I was under the impression that hard drive was standard equipment, but on a machine this old, I suppose you take what you can get. However, I was a little thrown by the machine LOOKING for the hard drive, even though it ain't there. Evidently, you have to hold down the ALTERNATE key to boot from floppy, even if that's all you have. I thought something was wrong with this thing, at first.
Somewhere, I have an Ultrasatan (I confess I've never used), HD Driver (ordered from Uwe), and an adapter that lets you put the Ultrasatan internal to the Mega STe (from a teriffic chap on atari-forum). Although I'm quite familar with the use of the ST, I never could afford a hard disk "back in the day" and I'm wondering if there is a how-to-FAQ for the hard disk (or Ultrasatan or whatever) user, so I could peruse it, before asking 20 questions that have been answered 40 times before.
Looking at the RAM.....
.....All 4 are different brands. NICE!!!!! This kind of bothers me, but I've been gaming with it for a good while, and it appears to be stable. I've read differing opinions on this.
I was surprised - when I went to format a floppy - that the High Density option was there. I thought I read that the 1.44MB drive was either an upgrade, or on later Mega STe only. Sysinfo says this has the older TOS 2.05, so either 1.44MB drive is standard, or has this been upgraded?
I don't much see the point, as I'd like to be able to read the disks in my 1040STe (and other lesser machines, too), but I guess it's nice that it's there. Interestingly, when I put the disk into my PeeCee......
.....it recognizes a different number of bytes than the Atari screen shows. Whatever, I was able to read and write to the disks with my PC just fine, and create a system boot disk. [Thanks Christos, for the System Disk info a few messages above].
I'd never seen the CPX thing before. I set to 16Mhz and cache, and it saved to the floppy. I suppose this means, then, that there's no way to boot another disk (without CPX) - like a boot disk game - and run at 16Mhz with cache? Same for the blitter, which seems to default to "OFF." I assume most games wouldn't work anyway, but the Mega STe is always going to default to 8Mhz and no cache, and no blitter when it's switched on, then, right? I also assume that unless a game is specifically-written to use the blitter, it wouldn't help anyway?
Thanks for info. I'm a 520/1040 man, and as such, this thing is a bit strange, but a very interesting machine. It makes me wish I'd stuck around a bit longer in the old days, but I probably couldn't have afforded a Mega STe back then, anyway....LOL.