Hi. Turns out this nick was registered a while but I never bothered using it.
Some background: I recently started a little nes project that I felt like making when playing thrust on c64. Originally it WAS going to be on the c64 but I didn't have to look past the scrolling h/w it used to figure out I wanted another system. The physics / level / most of the sprites are all implemented so it's mainly just putting together levels now. It's a 40kb NROM.
The main question is that c64 thrust had single color terrains with alternating lines of transparent / solid color. I don't really know if a regular TV hooked up to the nes would spoil it because of the whole composite blur issue. c64 could output to a RGB monitor so I don't really know what would happen on a typical NTSC TV. I don't have hardware to test with so I judge it myself, nor do I know anything about exactly how NTSC effects specific patterns on screen. Anyone here with the technical insight to give me an idea?
here's what it looks like now. I could just turn the terrain until single lines and it'll fit just as well.
http://img401.imageshack.us/img401/343/rom02jt0.png
http://img525.imageshack.us/img525/8378/rom03zy7.png
Also, I've played around with the sound a bit, particularly noise (for the thrusting sound) and it works like I'd expect, but a while after noise playback I start to hear these artefacts. Crackles, buzzing, noises apart from what I'd like to hear. I only see a few registers, I don't know what I'm doing wrong here. When it plays intially, it sounds right, then the artefacts come shortly after. Any ideas on this too?
Also, apart from waiting for 2 vblanks at reset are there any other pitfalls for real hardware support?
Thanks for reading
Some background: I recently started a little nes project that I felt like making when playing thrust on c64. Originally it WAS going to be on the c64 but I didn't have to look past the scrolling h/w it used to figure out I wanted another system. The physics / level / most of the sprites are all implemented so it's mainly just putting together levels now. It's a 40kb NROM.
The main question is that c64 thrust had single color terrains with alternating lines of transparent / solid color. I don't really know if a regular TV hooked up to the nes would spoil it because of the whole composite blur issue. c64 could output to a RGB monitor so I don't really know what would happen on a typical NTSC TV. I don't have hardware to test with so I judge it myself, nor do I know anything about exactly how NTSC effects specific patterns on screen. Anyone here with the technical insight to give me an idea?
here's what it looks like now. I could just turn the terrain until single lines and it'll fit just as well.
http://img401.imageshack.us/img401/343/rom02jt0.png
http://img525.imageshack.us/img525/8378/rom03zy7.png
Also, I've played around with the sound a bit, particularly noise (for the thrusting sound) and it works like I'd expect, but a while after noise playback I start to hear these artefacts. Crackles, buzzing, noises apart from what I'd like to hear. I only see a few registers, I don't know what I'm doing wrong here. When it plays intially, it sounds right, then the artefacts come shortly after. Any ideas on this too?
Also, apart from waiting for 2 vblanks at reset are there any other pitfalls for real hardware support?
Thanks for reading