Debug Messages in no$gmb and BGB
I’ve recently started working on a little side project, involving Gameboy development. While reading through the docs of BGB, I noticed it supports printing debug messages to a debug console, I, however, couldn’t get it working, since it was using the syntax of the no$gmb assembler. Thanks to the people of #gbdev on EFnet, especially beware, I’ve eventually got it working, and made an rgbds macro out of it.
Without further ado, here is a gist of the it:
IF !DEF(DEBUG_INC)
DEBUG_INC SET 1
; Prints a message to the no$gmb / bgb debugger
; Accepts a string as input, see emulator doc for support
DBGMSG: MACRO
ld d, d
jr .end\@
DW $6464
DW $0000
DB \1
.end\@:
ENDM
ENDC ; DEBUG_INC