Here's what I know about the MB128, copied from
the TG16/PCE save info page on my website:
Games with Memory Base 128/Save-kun Support (complete list)
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J CD
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A-Train III (A. III, A-Rensha de Ikou III)
Aoki Ookami To Shiroki Mejika
The Atlas
Bishoujo Senshi Sailor Moon Collection
Brandish
Eikan Wa Kimini
Fire Pro Female Wrestling
Linda Cube
Magicoal
Popful Mail
Princess Maker 2
Private Eye Doll
Sankokushi III
Shin Megami Tensei
Super Real Mahjong P II + III Custom
Super Real Mahjong PV Custom
Tadaima Yusha Boshuuchuu
Vasteel 2
Emerald Dragon also claims to have MB128 support, but it does not in fact work; you can copy blocks between the system and MB128 through the game (see below), but cannot actually save to the MB128, unfortunately. Quite unfortunate!
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MB128 games which allow you to backup your system save data (or other primary 2KB backup device) by copying the complete 2KB block to a block on the MB128. There are 63 available blocks, understandably (128KB for the MB128, 2KB for the internal memory). See the source link below for more info. Note that each title’s backup blocks on the MB 128 can only be accessed (and copied back to the system memory) by that game — they are not inter-compatible with the other titles on the list.
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J SCD
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Popful Mail
Private Eye Doll (third option from main menu)
Emerald Dragon (hold UP when you press RUN on the CD BIOS screen to access. In that menu, top to bottom, Load, Save, Swap, Delete Bank, Delete All MB128 Banks. This is the games’ only actual support for the MB128. This manager ONLY allows you to copy memory blocks to and from the MB128, you cannot see the files for games which save directly to the MB128 — for that see below. Oh — if you hold II at boot instead of Up, you’ll go straight to a load-game screen, skipping the intro and such.)
Vasteel 2
MB128 games with a manager that allows you to view what files are saved to the MB128, but not necessarily to copy blocks back and forth from the system
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J SCD
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Brandish (Hit Run, choose Load, then choose the lower-left option from the six-option grid on the screen that appears [note: this screen only appears when a MB128 is connected.]. It’s in Japanese text, directly below Save. This screen shows a list of the files saved to the MB128. They don’t have file sizes because each one is 1 ‘block’, or 2KB. Each memory backup (from, say, Emerald Dragon) or game save from a MB128-compatible game creates a file that takes up 1 space on the MB128. Here you can see what’s on the unit, and delete files if you want.)
MB128 games with MB128 managers that have unknown functions (need info)
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J SCD
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Tadaima Yusha Boshuchu – press 1+Run at boot for manager
Linda Cube – press Up+Run at boot for manager"
Thanks to this thread we now know that Linda Cube's manager is apparently similar to Emerald Dragon's. Is it actually so similar that it can read Emerald Dragon-created save backup files though, or are they still separate in the way that Private Eye Dol and Emerald Dragon cannot read each others' backup files? I'd presume the latter but don't have that game so I don't know myself.
I totally forgot..but a few weeks ago I made this Pastebin that contains all of the games that either use the MB128 natively or have programs to interface with it.
https://pastebin.com/wDJQEz3U
I am going to try Popful Mail and Linda and see where that gets me.
The bottom three paragraphs of 'your' Pastebin there are a copy of a post of mine from Neogaf a few years ago:
http://www.neogaf.com/forum/showpost.php?p=162818950&postcount=2676 Don't claim things as yours that aren't...
As an addendum to one thing I say there though, on the battery life... so, I haven't replaced the batteries in my MB128 in quite a while. I just put in Brandish though, and all of the files I've put there, either for games with direct MB128 saves or for save backup archives, are still on the MB128, fully intact. Now, the batteries I had in it are Duracell Quantums, which have the powercheck testers on them. I just checked the batteries, and none of the four register anything on the testers, but despite that they still aren't fully dead and do have some charge in them; I put them in a GBC and they run it, though clearly far from full charge going by the battery light's brightness, for example. Interesting. The MB128 has a backup capacitor to keep the files for a little while when you are changing the batteries, but that can't hold the files for very long so these batteries must still be good.
So yeah, with Duracell Quantums at least, that "6-9 months" I said there and before on this forum as well I believe is conservative; it actually should be able to last a year, at least.
The one question I have left though is, does the MB128 draw power from the system? Like, when you remove the battery box the MB128 holds saves, but if you do this while the system is on is that just using the backup capacitor and thus in an hour or two or something your saves would be gone, or is it actually drawing power from the wall, while the system is on at least (I presume it couldn't when power is off?), to hold a charge that way? I don't know.
OK, so I think I have this figured out.
I can copy the contents to whatever bank I want using Private Eye Dol fairly easily. However, if I want to view the contents in any of the MB128's banks I first have to copy the contents of that bank to the PC Engine (make sure to backup the PCE first in another bank). Then I load up the Erase tool (bottom right/4th option) and select the PCE. I can then view the individual save files.
Is there a better way to view your saves on the MB 128 than that particular method? It's not a huge issue but I would be totally fine loading up another game if I simply wanted to check out everything I had saved on the MB128 easily. Loading up each bank individually like how I described would be a bit of a PITA in the future after I have more saves. I guess I could always just put the info on a Google Sheet haha.
The problem is that to the MB128, that file is not separate savegames; it is instead a single save file created by the host game, be it Private Eye Dol (which, yes, has maybe the nicest of the save backup applications), Emerald Dragon (this games' save backup app works fine for me, at least, though Private Eye Dol's is better), or the other two with similar apps that I don't have (as listed above). If you use Brandish (via the method I describe above) to look at the list of files in the MB128 itself, you'll notice that it's just a list of files. You can't view the contents of those files because only the game apps know that anything is in that file other than just a regular MB128 save file.
So, unfortunately, as far as I know the only way to view the contents of an MB128 save backup file is to view it in that games' MB128 save copy utility. It's annoying but that's how it is.
So basically, can anyone say if Tadaima Yusha Boshuchu, Popful Mail, or Vasteel 2's save copy applications are any different from the others?