Minimig AGA 060 RTG

[unusedunused]

I see in MOS powersdl, there is a call to do alpha blit on AOS.the source is in AROS too, its only software in this bltbitmapalpha func, but when call the minimig Blitter which can do alpha blitting this can do in hardware extreme fast.

Code: [Select]

static int CGX_HWAccelBlit(SDL_Surface *src, SDL_Rect *srcrect, SDL_Surface *dst, SDL_Rect *dstrect)
{
  //D(bug("[SDL] CGX_HWAccelBlit()\n"));

  if (src->hwdata)
  {
  if (src->flags & (SDL_SRCALPHA|SDL_SRCCOLORKEY)) // && (src->hwdata->pixfmt == PIXFMT_ARGB32 || src->hwdata->pixfmt == PIXFMT_BGRA32))
  {
    STATIC CONST struct TagItem Tags1[] = { { BLTBMA_USESOURCEALPHA, TRUE }, { TAG_DONE, 0 } };
    //STATIC CONST struct TagItem Tags2[] = { { BLTBMA_MIXLEVEL, 0xffffffff }, { TAG_DONE, 0 } };

    BltBitMapAlpha(src->hwdata->bmap,
            srcrect->x,
            srcrect->y,
            dst->hwdata->bmap,
            dstrect->x,
            dstrect->y,
            srcrect->w,
            srcrect->h,
      (struct TagItem *)&Tags1);
                //src->flags & (SDL_SRCCOLORKEY|SDL_SRCALPHA) ? (struct TagItem *)&Tags1 : (struct TagItem *)&Tags2);
  }
  else
  {
    BltBitMap(src->hwdata->bmap,
            srcrect->x,
            srcrect->y,
            dst->hwdata->bmap,
            dstrect->x,
            dstrect->y,
            srcrect->w,
            srcrect->h,
            0xc0,0xff,
            NULL);
  }
  }
  else
  {
  struct RastPort *rp;


[xyzzy]

Will the 060 board require a full 060 or will it work fine with an EC 060?

[whiteb]

Will the 060 board require a full 060 or will it work fine with an EC 060?

Well the difference between the two is the presence of MMU and FPU AFAIK so as long as the pins are the same (Which they are i believe) it should work.

[mikej]

The hardware will work fine. Software which needs the MMU or FPU will not work, unless these functions are emulated.
I am not sure what the WB or AROS requirements on these blocks are.

Cheers,
Mike

[espskog]

Will the daughterboard work 100% with all its functions and glory even if no 060 is fitted ?

[yaqube]

Will the daughterboard work 100% with all its functions and glory even if no 060 is fitted ?

Yes, there isn't any hardware limitation which could prevent the main board from using daughter board peripherals when the 060 CPU is not present. But we haven't implemented this functionality so far.

[kolla]

4:3 1280x1024 monitors today are a bit harder to get hold of.

They don't exist. Native 1280x1024 monitors are 5:4 which makes them unusable for any 4:3 mode, unless you're lucky and it supports letter boxing.

[Kremlar]

You may be right, but a lot of manufacturers state 4:3.
 
Here's an example:
http://www.viewsonic.com/products/desktop-monitors/lcd/graphic-series/vg932m.htm
 
But if I do the math, it is closer to 5:4 than 4:3.

[Louis Dias]

You may be right, but a lot of manufacturers state 4:3.
 
Here's an example:
http://www.viewsonic.com/products/desktop-monitors/lcd/graphic-series/vg932m.htm
 
But if I do the math, it is closer to 5:4 than 4:3.

It could still be 4:3 if the pixels are not square.  You'd have to physically measure your viewable area to verify this.

[Kremlar]

The specs on that model list the visible area:
 
Display Area
14.8" horizontal x 11.9" vertical; 19" diagonal
 
Although they state 4:3, if you do the math it's closer to 5:4.

[Heiroglyph]

It could still be 4:3 if the pixels are not square.  You'd have to physically measure your viewable area to verify this.

This is correct, not all resolutions have square pixels.  1280X1024 is one of the most common that isn't NTSC 720x480 or PAL 720x576.

[psxphill]

This is correct, not all resolutions have square pixels. 1280X1024 is one of the most common that isn't NTSC 720x480 or PAL 720x576.

Whether a pixel is square depends on the aspect ratio of the monitor you're using as well as the ratio of the pixel resolution.

[Heiroglyph]

Whether a pixel is square depends on the aspect ratio of the monitor you're using as well as the ratio of the pixel resolution.

I meant that in general, a 1280x1024 screen is expected to be 4:3 display aspect which would have non-square pixels.

[kolla]

A 1280x1024 display on a 4:3 monitor is useless - all images and graphics on the computer are assuming square pixels - why would anyone _want_ it to be "flattened" out to 4:3? Seriously, I have yet to encounter a native 1280x1024 monitor that doesn't have square pixels, and I wish they never existed since they're useless for any other regular mode.

[Daedalus]

I think - as has been pointed out before - that these monitors with 1280x1024 resolution do actually have close to square pixels and a 5:4 ratio, even when they state 4:3. I think 4:3 is simply used as a common term for "old-style" proportions, as in a monitor is described as either 4:3 or 16:9, even if it's actually 5:4 or 16:10...

[joemango]

While it's possible for the Replay to be configured to emulate arcade hardware, you can't use MAME to do this. Someone will have to code the emulations specifically for the Replay.

Right.  Definitely some work to be done there.  But assuming the building-block coding structure of MAME I figure a system could be set up to load a specific set of IC cores for a given game onto the Xilinx and emulate on the ARM whatever you can't do in the FPGA (which I doubt is much, except what isn't written yet.)  I'm figuring it should be able to at least run about 1994-vintage games at best (but what do I know?)

Does the ARM have the same access to all the i/o lines the FPGA does?  Or does it have some exclusive bus link to it?  I guess what I'm getting at is, could the ARM be used as a coprocessor or is it too busy managing other stuff to be any help?