MAMEWorld Forums - Programming - Re: (Vectrex) Assembler prob...

> A long time ago I downloaded some sample vectrex source code and adapted one
> particular program to play a little tune I transposed from guitar...
>
> Anyway, I could never get the program to repeat the main procedure (even in the
> sample before I started messing with it). Here is a snippet:
>
> main_loop:
> JSR DP_to_C8 ; DP to RAM
> LDU #yankee ; get some music, here yankee
> JSR Init_Music_chk ; and init new notes
> JSR Wait_Recal ; Vectrex BIOS recalibration
> JSR Do_Sound ; ROM function that does the
> ; sound playing
> BRA main_loop ; and repeat forever

I would assume that Do_Sound is never returning. Try running it in an emulator with a good debugger (like MESS) and see if it even makes it to the BRA.