Search found 9 matches
- Fri Aug 28, 2020 11:48 am
- Forum: NESemdev
- Topic: VBlank and NMI timing
- Replies: 8
- Views: 3113
Re: VBlank and NMI timing
Thank you so much! This is what I wanted to understand. You have explained very clearly.
- Fri Aug 28, 2020 10:37 am
- Forum: NESemdev
- Topic: VBlank and NMI timing
- Replies: 8
- Views: 3113
Re: VBlank and NMI timing
4a. If PPU register $2000 bit 7 (NMI enable) is already on when PPU register $2002 bit 7 (VBLANK) gets turned on, an NMI will be generated. 4b. Similarly, If PPU register $2000 bit 7 is turned on when PPU register $2002 bit 7 is already on, another NMI will be generated. When does this happen? That...
- Fri Aug 28, 2020 10:07 am
- Forum: NESemdev
- Topic: VBlank and NMI timing
- Replies: 8
- Views: 3113
Re: VBlank and NMI timing
No, the question is not about how late the 6502 handles interrupts. And about whether there is a delay in calling this interrupt from the PPU during the onset of the VBlank period.
- Fri Aug 28, 2020 2:42 am
- Forum: NESemdev
- Topic: VBlank and NMI timing
- Replies: 8
- Views: 3113
VBlank and NMI timing
Hello. Well, tell the fool. I am currently dealing with vbl and nmi timings in my emulator. The question torments me. NMI interrupts are called with the vblank setting, during 241 scanlines and 1 cycle? Or the NMI is invoked with a delay, and if so, why? I know ... the question is stupid, but I'm co...
- Tue Aug 25, 2020 10:52 pm
- Forum: NESemdev
- Topic: An error in the branch test
- Replies: 2
- Views: 2112
Re: An error in the branch test
Thank you very much! Everything is exactly as you said!
- Tue Aug 25, 2020 10:19 pm
- Forum: NESemdev
- Topic: An error in the branch test
- Replies: 2
- Views: 2112
An error in the branch test
Hello. If I understand correctly, then to execute the branch instruction: If the jump was not made, then the instruction takes 2 cycles. If the transition was made, +1 cycle = 3 cycles. If boundary is crossed, +1 cycle = 4 cycles I am using the "2.Backward_Branch.nes" test. It gives the error "5) Br...
- Thu Aug 20, 2020 1:06 am
- Forum: NES Music
- Topic: Nes sampling rate
- Replies: 2
- Views: 1710
Re: Nes sampling rate
Thank you very much!
- Wed Aug 19, 2020 11:21 pm
- Forum: NES Music
- Topic: Nes sampling rate
- Replies: 2
- Views: 1710
Nes sampling rate
Good time of day.
I am writing my nes emulator. I am currently writing APU. This question arose. At what points do I need to make a sample selection to get 735 samples per frame. I know this is a stupid question, but the problem is that I can't associate the sample rate with the APU frequency.
I am writing my nes emulator. I am currently writing APU. This question arose. At what points do I need to make a sample selection to get 735 samples per frame. I know this is a stupid question, but the problem is that I can't associate the sample rate with the APU frequency.
- Mon Jun 01, 2020 3:46 am
- Forum: NESemdev
- Topic: [SOLVED] SMB Title Screen isn't rendering in a proper way
- Replies: 5
- Views: 9570
Re: [SOLVED] SMB Title Screen isn't rendering in a proper way
Good day.
I am Russian and apologize in advance for my English.
I could not resist and say thank you!
I had the same problem!
I am Russian and apologize in advance for my English.
I could not resist and say thank you!
I had the same problem!