Search found 102 matches

by Alyosha_TAS
Mon Jan 30, 2017 7:34 pm
Forum: NESemdev
Topic: Weird bug in my emulator! [SOLVED]
Replies: 8
Views: 3246

Re: Weird bug in my emulator!

1. Running the Stars Demo (PD), I got an invalid opcode ($12), and the emulator tries to RESET. 2. Loading a new ROM makes the bug to trigger... see the screenshot. Not only that game, but any other. WTF is that? 1. The ROM ends up reading from un-cleared RAM starting at $0784. Emulators that initi...
by Alyosha_TAS
Wed Jan 11, 2017 7:19 pm
Forum: NESemdev
Topic: Visual Nes - C++/C# port of Visual 2A03 + 2C02
Replies: 49
Views: 11550

Re: Visual Nes - C++/C# port of Visual 2A03 + 2C02

This is really cool stuff Sour! I'm already impressed at the speed this is running at and what you are getting it to do. I'll definitely be keeping track of the progress and look forward to making use of it.

Good Luck!
by Alyosha_TAS
Sat Oct 15, 2016 3:39 pm
Forum: NESemdev
Topic: puNES Emulator
Replies: 766
Views: 1038887

Re: puNES Emulator

Yeah you're right it's one screen not four screen, my mistake.

Any idea about the saveram?
by Alyosha_TAS
Sat Oct 15, 2016 12:10 pm
Forum: NESemdev
Topic: puNES Emulator
Replies: 766
Views: 1038887

Re: puNES Emulator

4 screen seems unlikely... even in the later pirate era, adding an extra IC costs money, and most of the time it seems to be bad documentation rather than 4-screen layout. Then again, the game seems to only boot probabilistically (staying at a solid grey screen the rest of the time), so it's kinda ...
by Alyosha_TAS
Sat Oct 15, 2016 4:25 am
Forum: NESemdev
Topic: puNES Emulator
Replies: 766
Views: 1038887

Re: puNES Emulator

The game Chaos World (CH) crashes on the opening in game cutscene (after you create a character and start the game.) It crashes because it expects 4 screen mirroring. I'm not sure if mapper 195 is supposed to have 4 screen mirroring available, or if the game uses a slightly modified mapper, or actua...
by Alyosha_TAS
Wed Sep 21, 2016 5:58 pm
Forum: NESemdev
Topic: Some accuracy tests on Famicom AV
Replies: 13
Views: 5862

Re: Some accuracy tests on Famicom AV

Awesome! Thanks again for running those. So looking at the V2 test and comparing to the original, this confirms my suspicion that the greyscale check happens 2 pixels later then the toggle background check. The only thing I changed is which one is toggled, and the results are evident that V2 takes e...
by Alyosha_TAS
Tue Sep 20, 2016 4:36 pm
Forum: NESemdev
Topic: Some accuracy tests on Famicom AV
Replies: 13
Views: 5862

Re: Some accuracy tests on Famicom AV

Cool thanks. Looks like the blue definitely messed with the capture a bit. If you don't mind, I have just one more scanline variant I would like tested. This one toggles greyscale in the exact same places that the original scanline test does. So if there is any difference between the results of this...
by Alyosha_TAS
Sun Sep 18, 2016 6:04 pm
Forum: NESemdev
Topic: Some accuracy tests on Famicom AV
Replies: 13
Views: 5862

Re: Some accuracy tests on Famicom AV

Thanks for running the test. Is that how the screen really looked though? Or is something just up with the video?

If that blue color isn't getting captured very well I can pick a different one. There are a couple more similar tests I'm thinking about so let me know if I need to change it.
by Alyosha_TAS
Fri Sep 16, 2016 7:56 pm
Forum: NESemdev
Topic: Some accuracy tests on Famicom AV
Replies: 13
Views: 5862

Re: Some accuracy tests on Famicom AV

Hi,

I have hex editted the scanline test a bit to use greyscale toggling in the first test instead of background rendering. I would be very interested seeing the results if you would be able to do it.


It is attached.
Thanks!
by Alyosha_TAS
Tue Sep 13, 2016 5:13 am
Forum: NESemdev
Topic: Rendering pipeline and the NMI_sync test
Replies: 2
Views: 2176

Rendering pipeline and the NMI_sync test

Hi all, I am trying to pass the NMI_Sync test, but the middle line is 2 pixels too short. At this point I can pass every other blargg test out there, so there really isn't anything in the NMI / VBL timing I can change to try to make this test work. I came across http://wiki.nesdev.com/w/index.php/PP...
by Alyosha_TAS
Tue Jun 28, 2016 5:27 pm
Forum: NESemdev
Topic: OAM/DMC DMA tests
Replies: 39
Views: 14601

Re: OAM/DMC DMA tests

Hi, I am working on DMC DMA currently and found this thread immensely helpful, thanks for all the wealth of knowledge. I do have a question though about something Disch wrote in his dropbox notes in the opening post of this thread: ; LDX starts at cycle 8 (after reset) ; $4015 write happens on cycle...
by Alyosha_TAS
Wed Jun 15, 2016 12:09 pm
Forum: Newbie Help Center
Topic: sprdma_and_dmc_dma test help needed
Replies: 0
Views: 5131

sprdma_and_dmc_dma test help needed

Hello NesDev :) I am working on an emulator and this test has me stumped. If anyone can offer any advice I would really appreciate it. So far the emulator passes the DMC basics test, so I'm pretty sure I'm on the right track in working out the DMC and DMA timings, but this test hangs on me every tim...