wolfenstein demo for sega genesis
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That's what I think too.Stef wrote:So when you send data to YM port the busy flag seems to take more cycles to switch to "busy" on the YM3438 than the YM2612.
Last night I finished constructing the test cartridge, and I've been testing the roms in the two systems, with the previous version in the genesis Model 1 sounds good, and the other is a "Genesis2" pirate, sounds bad, and the last version sounds good in both models. I can now confirm that the three NOPs is what makes the difference, because I tested with the previous code to write to the YM regs just adding the three NOPs, and also worked well.
Here are some pictures of this "experimental" test cartridge I did:
http://www.mediafire.com/download/3jkds ... k_cart.rar
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Thank you and also thanks to TmEE co.(TM) that made me think about adding NOPs to make it work.Glad you finally fixed the problem
About the cartridge, I will soon make another but using a 1MB flash memory (SST39VF800A). Fortunately there is enough documentation on how to program it. I believe that at least the first episode of this game, could fit into this memory.I amazed you realized your own flash cart so quickly, well done, hope it will help you in further testing / debugging.
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TmEE is an expert when it comes to YM stuff And it is a nice information to know about, i never meet this problem in my Z80 drivers because i only do PCM stuff but i would meet it in future some drivers i guessgasega68k wrote: Thank you and also thanks to TmEE co.(TM) that made me think about adding NOPs to make it work.
Sound good ! I'm really looking forward to see ennemies sprites added, i guess this is a big part though.About the cartridge, I will soon make another but using a 1MB flash memory (SST39VF800A). Fortunately there is enough documentation on how to program it. I believe that at least the first episode of this game, could fit into this memory.
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I'm here again with a new version of the demo. In this version I put 5 levels and a level select screen, because I wanted to try some things, for example the operation of locked doors that need keys. I have also added two more musics, the music playing on the selection screen, of course, does not come from wolfenstein, and music that sounds at levels 2 and 4 is the one heard on the first level of the SNES game, but in the pc version, according to the source, is only in the secret level of episode 6.
I've started reading the source for active objects (enemies), perhaps in the next version will have some enemies, but is a bit complicated and maybe it will take me some time to do this.
Here is the link to download:
http://www.mediafire.com/download/8z883 ... emo_b3.rar
I've started reading the source for active objects (enemies), perhaps in the next version will have some enemies, but is a bit complicated and maybe it will take me some time to do this.
Here is the link to download:
http://www.mediafire.com/download/8z883 ... emo_b3.rar
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New version of the rom available.
In this version I've added several things, first I made the intro of the game with the music, also did the music for the menus, now you can finish a level (although there are only 5 levels, I have to draw some more textures for walls to add more levels), and most importantly: I added what would be the first test with enemies, but is only a test, it's just the standing guard, not moving, and you can not kill him.
Still a lot to do, but at least I have what would be the main structure of active objects (enemies).
This is the link to download it:
http://www.mediafire.com/download/7ummf ... emo_b4.rar
In this version I've added several things, first I made the intro of the game with the music, also did the music for the menus, now you can finish a level (although there are only 5 levels, I have to draw some more textures for walls to add more levels), and most importantly: I added what would be the first test with enemies, but is only a test, it's just the standing guard, not moving, and you can not kill him.
Still a lot to do, but at least I have what would be the main structure of active objects (enemies).
This is the link to download it:
http://www.mediafire.com/download/7ummf ... emo_b4.rar
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