DCEmu Homebrew Emulation & Theme Park NewsI know some people is more than happy with what is actually a side effect of the slower pixel clock: no more screen tearing in certain emulators/games. However, I feel the priority is making dual-boot completely transparent to original firmware. And most importantly, the original firmware is unacceptably slow for some. For those that do need the slow pixel clock "untearing" effect, someone will soon release an "LCD underclocking" application (.app).
Regarding "tearing", it's a visible artifact resulting from frequency mixing. The two frequencies involved are the LCD refresh frequency (set by the LCD pixel clock) and the application screen refresh frequency (commonly called FPS or frames per second). When you multiply two frequencies you obtain two other frequencies: the sum and the substraction. The sum is usually too high to be noticed (65Hz+60Hz = 125Hz), but the substraction is a whole different story (65Hz-60Hz = 5Hz, which is very visible). This is the same effect you can see when you use a camcorder to record an old tube TV.
The only way to get rid of it is retrace syncronization, that is, to force the application to refresh screen at the same rate than the LCD is refreshed. I haven't studied very well how the LCD works and is connected, but I suspect that there is no easy way to synchronize the applications and the LCD. It may not be impossible, but it is certainly going to be difficult.
What you can be sure of is that the original firmware makes no efforts to synchronize, and that is not going to change anytime soon. Our best bet regarding this issue is definitely linux.
Finally one personal note: this has been so fast because I had plenty of time. I've been sick at home for the last three days: I had a very bad muscle contracture on tuesday evening and have had to stay in bed for the last two days. Today I'm better but can't stay sit or standing for very long. Fortunately with help from my wife I found a way to comfortably use my laptop while laying on my stomach. It's quite funny but works. Don't be surprised if you don't see any updates for the next days since I have lots of work (the one that pays the bills) pending.
Regarding "tearing", it's a visible artifact resulting from frequency mixing. The two frequencies involved are the LCD refresh frequency (set by the LCD pixel clock) and the application screen refresh frequency (commonly called FPS or frames per second). When you multiply two frequencies you obtain two other frequencies: the sum and the substraction. The sum is usually too high to be noticed (65Hz+60Hz = 125Hz), but the substraction is a whole different story (65Hz-60Hz = 5Hz, which is very visible). This is the same effect you can see when you use a camcorder to record an old tube TV.
The only way to get rid of it is retrace syncronization, that is, to force the application to refresh screen at the same rate than the LCD is refreshed. I haven't studied very well how the LCD works and is connected, but I suspect that there is no easy way to synchronize the applications and the LCD. It may not be impossible, but it is certainly going to be difficult.
What you can be sure of is that the original firmware makes no efforts to synchronize, and that is not going to change anytime soon. Our best bet regarding this issue is definitely linux.
Finally one personal note: this has been so fast because I had plenty of time. I've been sick at home for the last three days: I had a very bad muscle contracture on tuesday evening and have had to stay in bed for the last two days. Today I'm better but can't stay sit or standing for very long. Fortunately with help from my wife I found a way to comfortably use my laptop while laying on my stomach. It's quite funny but works. Don't be surprised if you don't see any updates for the next days since I have lots of work (the one that pays the bills) pending.
Download Here
News Categories
Sony Consoles News
DCEmu News Archive
Menu
Forum Stats