Current Problem PowerPak Games

blargg · Post by **blargg** » Thu Nov 25, 2010 8:56 pm

tepples wrote:I've made a ROM that fills PRG RAM with a pattern and then hex-dumps it. Does $A001 bit 6 (read-only PRG RAM) exist?

Yes, I was using it a few weeks ago and verified that it write-protects WRAM, but still allows reading.

J-Aap · Post by **J-Aap** » Fri Nov 26, 2010 12:32 am

loopy wrote:There was glitching on WRAM /WE. I added a filter to M2 to fix it. This seems to have fixed Crystalis as well.

http://home.comcast.net/~olimar/NES/pow ... 3test2.zip

This seems to work!! Played ff3 again and the airship glitch did not occur. Fantastic! Thnx Loopy

loopy · Post by **loopy** » Fri Nov 26, 2010 1:08 am

tepples wrote:Could you elaborate on what kind of conditions would have caused such a glitch in old MAP04 versions, so that I can trigger these conditions in my test ROM to make sure this doesn't happen again?

PRG /CE (which is used by the mapper to get A15) changes slightly after M2. Writes to E000-FFFF would briefly assert WRAM /WE, causing ram corruption.

loopy · Post by **loopy** » Sat Nov 27, 2010 7:21 pm

I applied the same fixes to my other mappers, and made a few other changes. It's interesting that thefox didn't have the same problem with his MMC3 mapper, I wonder why.

MMC3: improve IRQ timing
MMC3: add "open bus" read for 4016/4017 (fix Dirty Harry control problem)
VRC6: added mapper 26 (Esper Dream 2, Madara)
N106: IRQ bugs fixed

http://home.comcast.net/~olimar/NES/
If anyone has other requests, now would be a good time to ask them, while I'm in the mood

Post by **Memblers** » Sun Nov 28, 2010 1:15 am

loopy wrote: If anyone has other requests, now would be a good time to ask them, while I'm in the mood

What would be great is if there was an easier way for me to create PowerPak version of the Verilog modules I've made (for a CPLD cart). Some kind of Verilog template mapper would be great. I asked thefox for a similar type of template also and maybe I'll see that sometime, but I don't think it would hurt to have another example.

blargg · Post by **blargg** » Sun Nov 28, 2010 1:30 am

loopy wrote:MMC3: add "open bus" read for 4016/4017 (fix Dirty Harry control problem)

Please elaborate! I've recently run into some issues with open bus bits not always being zero for $4017, and wonder whether this is related.

loopy · Post by **loopy** » Sun Nov 28, 2010 1:49 am

Memblers wrote:What would be great is if there was an easier way for me to create PowerPak version of the Verilog modules I've made (for a CPLD cart). Some kind of Verilog template mapper would be great. I asked thefox for a similar type of template also and maybe I'll see that sometime, but I don't think it would hurt to have another example.

http://home.comcast.net/~olimar/NES/pow ... py_src.zip
Not a template, but here's the source to the mappers I've made.
I'll try to get a decent template for you tomorrow.

Great Hierophant · Post by **Great Hierophant** » Sun Nov 28, 2010 11:13 am

Can anyone implement these mapper variants, if needed?

Implement Mapper 206? This should fix Karnov and possibly some Tengen games. Ditto for Mapper 144 and Hot Slots/Peek-a-Boo Poker.

Mapper 158 - Used for Alien Syndrome, but the game seems to work fine in the PowerPak using Mapper 4. Ditto for Death Race and Mapper 144/79.

These numbers are used primarily, if not exclusively, in Nestopia.

Despite the previous work, FDS Metroid still does not work in my Famicom AV. Can anything be done? The best I can get is to load to a Brinstar screen loaded with tiles all over the screen and unable to move.

MottZilla · Post by **MottZilla** » Sun Nov 28, 2010 12:51 pm

loopy wrote: If anyone has other requests, now would be a good time to ask them, while I'm in the mood

Mapper 90? MMC5? VRC7? Might as well reach for the sky!

Great Hierophant · Post by **Great Hierophant** » Sun Nov 28, 2010 12:56 pm

Jeroen wrote:loopy has an early version of mmc5 on his site..........it works with cv3 but has some glitches in other games.

I can't seem to find such anywhere, and CV3 shows a black screen with the current set.

OldNESJunkie · Post by **OldNESJunkie** » Sun Nov 28, 2010 3:49 pm

Crystalis still seems to have issues even with your latest mappers. I play up the pont of findind the village elder in the cave where he tells you to get the lighthouse working, exit the cave & game crashes.

Edit 12/18/2010:

Just popped back on to mention I re-downloaded the updated Loopy map files & now Crystalis & others working fine for me.

loopy · Post by **loopy** » Sun Nov 28, 2010 8:14 pm

MottZilla wrote:
loopy wrote: If anyone has other requests, now would be a good time to ask them, while I'm in the mood
Mapper 90? MMC5? VRC7? Might as well reach for the sky!

I tried mapper 90. There are still some problems with it. You can download it with the others.

loopy · Post by **loopy** » Sun Nov 28, 2010 8:21 pm

blargg wrote:
loopy wrote:MMC3: add "open bus" read for 4016/4017 (fix Dirty Harry control problem)
Please elaborate! I've recently run into some issues with open bus bits not always being zero for $4017, and wonder whether this is related.

Probably not. All I did was set D7 and D5 low on 4016/4017 reads.

Post by **Memblers** » Mon Nov 29, 2010 10:21 am

Thanks, loopy! This is pretty cool to see.

I'll try compiling one of those when I get home later. I'm presuming I still need the constraints file or something from the PowerPak schematic, so the pinout can get assigned, and all that. I'll find out soon enough.

Great Hierophant · Post by **Great Hierophant** » Mon Nov 29, 2010 10:23 am

OldNESJunkie wrote:Crystalis still seems to have issues even with your latest mappers. I play up the pont of findind the village elder in the cave where he tells you to get the lighthouse working, exit the cave & game crashes.

I was able to get past that point just fine. However, the status bar is jumpy on the inventory screen and very occasionally when walking.