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MVSTracker for megadrive released

pascal - May 23, 2006

		pascal		May 23, 2006
			Finaly, my port of MVSTracker for the megadrive is working on the hardware ( Woohoo!!! thanks to the clues of Charles So go download it and i hope to hear some great composition soon get everything on www.pascalorama.com... For now, the driver is very simple, i gonna improve it in the future.Once your composition is good, export the binary using "export MVS0..." from the file menu.Include the resulting file in your code and here follow how to use the driver: 1) Give the driver, the address of the song move.l #Song_Address,d0 move.l #$a0151a,a0 move.b d0,(a0)+ lsr.l #8,d0 move.b d0,(a0)+ lsr.l #8,d0 move.b d0,(a0)+ move.l #$a0151d,a0 move.b #2,(a0)+ in more human readable language: #$a0151a = SongAddress & 0xf #$a0151b = (SongAddress>>8) & 0xf #$a0151c = (SongAddress>>16) & 0xf 2) Give the play command move.l #$a0151d,a0 move.b #2,(a0)+ ; 0 :silence 1: loop play 2: play once Pseudo code: #$a0151d = Command (0 :silence 1: loop play 2: play once)

		Edge-`		May 23, 2006
			Wow, great! Good work pascal. Quick question, when it comes to assembly, I'm still quite a newbie. How would I implement this into my XGCC project? Music is one of the major missing parts of Genesis development in my opinion, great to see people moving forward.

		pascal		May 24, 2006
			thanks unfortunatly i don't have xgcc, i prefer snasm68k it's not really hard to do, load the modplay.bin into z80 ram like done in the sega.s header file. once it's loaded, u have 4 bytes to set in z80 ram (don't forget the handshake) #$a0151a = SongAddress & 0xf #$a0151b = (SongAddress>>8) & 0xf #$a0151c = (SongAddress>>16) & 0xf and start the playing #$a0151d = Command (0 :silence 1: loop play 2: play once) if i find some time, i gonna try to do a C sample. regards pascal