Hi, all!. I may be new to this group and to development of S/W for
the Game Boy platform, But I am not new to writing code for micros.
My experience extends through intel, motorola and microchip
processors, mostly assembly language, but I can write in C if needed.

My question pertains to the resident code in the GB processor. I
understand that it tests the data in the cart rom for appropriate
entries and the like, but so far in my reading I have not discovered
whether there are subroutine calls that can be made to the resident
rom to do keyboard and display activity. Something like DOS BIOS
calls to read the keyboard and put characters on the screen. Is
there such S/W in the rom, or do you guys have to write that stuff
yourselves? I none exists, do any of you have "canned" routines that
can be included in any source code I develop. BTW, I'm not a game
developer, I want to design specialized S/W and H/W for the GB
platform, more like the GBDSO (digital sampling oscilloscope). Oh,
did I mention that I also design digital and analog H/W?

Feel free to contact me off line, too.
Thanks in advance.

Bill