Unless you have a particular reason to keep all those kos_img_t structs around, you could just pre-compile all the polygon headers while loading the map. So, instead of this bit: maplpDDSTiles[i] = (kos_img_t *)malloc(sizeof(kos_img_t)); maplpDDSTiles[i]->w = mapblockwidth; maplpDDSTiles[i]->h = map...

The newer WRT54G models have different hardware, less available flash, less RAM, and a different OS. They usually can't be flashed, but the WRT54GL models can (basically the same as the last flashable WRT54G, but slightly more expensive).

We once tried using one of those for the same purpose. Didn't work. It can only be used to create a new wireless network - it can't connect to an existing one. The hardware can usually do it, but the firmware on the device usually can't. Most manufacturers sell three classes of device - a wireless r...

If a single translucent pixel was at the top and everything under it was opaque, then I believe PowerVR would only have to blend with the first opaque pixel below it and nothing more whereas conventional GPUs would blend all the pixels below, barring software-based deferred rendering...??? That's r...

pvr_txr_load_ex(texture_pointer, image_data, width, height, PVR_TXRLOAD_8BPP); should be pvr_txr_load_ex(image_data, texture_pointer,width, height, PVR_TXRLOAD_8BPP); What is an "alpha-only texture"? and why "PVR_LIST_PT_POLY" because PVR_LIST_OP_POLY and PVR_LIST_TR_POLY both w...

Face it, we (computer users) grew of out terminals for a reason. If you hand an office worker/house wife/whatever a copy of MS-DOS and ask them which they'd rather use, that or Windows, it's Windows. Because they either: a) can't remember the commands b) never used DOS as an OS Which means you're d...

Thus far, the Homebrew Channel has been unaffected by any firmware updates. However, any firmware updates past 3.0 have tried to block the Twilight Hack, which is used to install the Homebrew Channel, and have patched the code signing bugs exploited by the Homebrew Channel installer. Twilight Hack n...

Yeah, you can have 8bpp images with transparency. You just need to make sure you're using a palette mode that supports an alpha channel (either ARGB1555 or ARGB8888 would be best), and that you set one of the colours to transparent. I wouldn't bother about optimizing the byte swapping. It's not real...

The topic of paletted textures came up recently, and since it seems that nobody has the slightest clue how they work, I figured I might as well try to explain it. Most of this can be deduced from the pvr.h file included with KOS (which is how I managed to get this working), but it can be a bit of a ...

I think I know what that is. That assertion is from the memory allocator - it indicates that something's corrupted the heap. Usually, this happens when you allocate a buffer of one size, and use it as if it were a different size. KOS allocates additional padding around each memory allocation, and ch...

You could, but it would be pointless. It just about worked for MAME because of the way MAME works. MAME is an enormous piece of software, with hundreds of different emulators for different components, and different types of arcade machines. The full version of MAME could not possibly run on a Dreamc...

Thinking about it, you might have malloc debugging turned on. Check kos/kernel/libc/koslib/malloc.c - if you can see that DEBUG and KM_DBG are defined, that means you have malloc debugging turned on. It seems to be enabled by default at the moment. DEBUG adds some additional checks and assertions. I...

Most of SDL's APIs are a great deal more complex, and often less flexible, than KOS's native APIs. Unless you require portability to other platforms, and there's no other way to accomplish it (which there is), there is no reason to use any part of SDL. The only parts of SDL that are noticeably diffe...

Basically, the Dreamcast's boot process works something like this: On startup, the BIOS is mapped starting at memory address 0x00000000. The SH-4 resets itself, and then immediately starts running code from the BIOS. Side note - the BIOS is a ROM chip, isn't reflashable, and doesn't get mirrored to ...

Assuming this is real (and it really looks like it - only a marketing company could come up with this crappy video), this is probably the stupidest thing that Sony has ever done. Essentially, it's a PSP with a smaller screen, no UMD drive, and a different memory card port. As far as I can tell, the ...

(Not knowing anywhere near as much about the PS2's hardware as I do about the Dreamcast's...) I know that there's nowhere near enough VRAM in the PS2 to store a high-def framebuffer. Assuming you actually want textures, something along the lines of 960x540 sounds about right - that's about 2MB for t...

It's a bit more complicated than that. I don't remember all the details, but it depends on not only the basic number of pixels but also how fast the color components are changing in general. You could have just, say, 128 pixels, and going from one end of the spectrum to the other on a pixel edge ca...

For VGA output, that should work. VGA consists of five separate analog signals (red, green, blue, horizontal sync, vertical sync), each of which are carried on dedicated signal lines. Since the signal lines carry the actual signal, you can use almost any resolution you like, up to the point where th...

Ah. So widescreen on PAL and NTSC requires a software solution because the hardware resolution is fixed (per the respective standard)? So is it possible to implement a hardware widescreen resolution eg 640x360 on the dreamcast vga output? Yes, and yes. The number of scanlines in PAL and NTSC is abs...

What resolution (geometry??) is commonly used to create widescreen in standard definition games in either PAL or NTSC? eg on ps2/wii? The same as 4:3 games. There's absolutely no difference between a widescreen and non-widescreen signal, so all you need to do is squash the screen so it'll look corr...