VA Holding (Van Aacken Holding B.V., see for instance on https://images.generation-msx.nl/cover/99f5d2be_c.jpg) seems to be the mother company of the latest company version. The copyright apparently belongs to that holding company for the Eurosoft games. The distribution company of that era is apparently Premium (III) Software. This situation seems to be valid for 1988. Most of these games are remakes or slightly changed versions of older Aackosoft/Bytebusters games (published by Eaglesoft).
Methodic Solutions seems to be a label they mostly used in 1987. It uses different packaging and also features some games by amateur programmers (like Double Brain!), not only their own in-house developers (like Steve Course and Jack Carboxy). The product codes are very much in-line with the Aackosoft/Bytebusters/Eaglesoft. There are even some games that were in a Methodic Solutions format but are marked as made by The Bytebusters, like Life in the Fast Lane or Hype.
The Aackosoft/Bytebusters/Eaglesoft names were used mostly before 1987, it seems.
As far as I know, the original Aackosoft company went bankrupt and it was probably continued as Eurosoft. Which went bankrupt within a year or 2 as well.
Something else: the [CTRL]-[SHIFT]-[CODE]-[GRAPH] on the Personal Databank isn't a boot key. You can also press it in the menu for example. Pretty weird, especially because the video mode isn't fully set for normal MSX-BASIC usage, so you indeed need to use the SCREEN instruction to correct it. Maybe some debug feature?
On the pages of Sony machines with external keyboard, it would be nice to mention which exact keyboard model number is coming with the machine.
Does someone know the keyboard model that comes with the HB-G900D? I suppose it's also the KBD-12D, like the F700D.
Of course you can add a Real Time Clock Programming page for MSXgl. The page you linked is to describe the programming bases of the hardware, it's not especialy for C programming so do not insert a C example but you can insert links to MSXgl pages.
About data used by other devices, it would be nice to add it in the actual page. I think there are already something about it.
I would like to add a note in the "Real Time Clock Programming" page with the data types I added in MSXgl: 6 : Save data 7 : Save data with signature
If someone else wants to add a new data type, I think it's fine if they know which ones are already in use.
Is this OK for you?
I think the best is to add a new section that could be "Software using RTC free bits'" with sub-sections for each concerned software. Note that there is already the special case of the Sony HB-F9P/F9S firmware, integrated in the standard explanations, but here we are talking about apart software, not firmware.
"Software using RTC free bits'" is too vague. The space available in the RTC is not large enough for that. It's better to make pages dedicated to the language concerned. (BASIC, msxgl, fortran, Fusion C, etc)
