@neauoire

I was going to say if you need help, ask, but - then I decided to just throw some things at you (:

http://marmsx.msxall.com/english.php (programming pages are on Portugese; I believe Brazilian dialect... but the code is of course code so managable (: ) Includes Pascal.
https://www.konamiman.com/msx/msx-e.html
https://github.com/Konamiman < Konamiman's pages and source code, mainly Spanish, but English translations...
http://www.z80.info/zaks.html < Programming the z80, 3rd edition, author's permission given (Rodney Zaks, pretty much the authority (: )
https://hansotten.file-hunter.com/ < archive of Hans Otten's msx pages, inclucing technical info
https://www.lavandeira.net/relearning-msx/

I have an MSX and an MSX2, and various folks I know (including here) have them, grew up with them, and still use them.

I have a noWind interface; but various other interfaces are possible. I reccomend something like that (:

@neauoire Again, if you need help, ask - there are resources here ( hey @FiXato - got any suggestions? (: ) and not on Mastodon. From folks still using their MSX machines (:

I just CANNOT find the devkit I found a while back that was a C compiler and toolkit, it was available from a MSX cartridge store for free... darn it...

http://map.grauw.nl/resources/ < this should also be helpful (: