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small doc update regarding spot ram

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This commit is contained in:
Michaël Banaan Ananas 2011-10-28 11:20:32 +00:00
parent ffa65b742d
commit 659b081960
2 changed files with 4 additions and 4 deletions
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4
src/mame/drivers/namcos22.c
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@ -2444,11 +2444,11 @@ static WRITE32_HANDLER( namcos22_mcuram_w )
}
/**
* I don't know how "SPOT RAM" affects the display, yet.
* I believe it's to support a "spotlight" effect, orthogonal to the polygon layer.
* Spot RAM affects how the text layer is blended with the scene, it is not yet known exactly how.
* It isn't directly memory mapped, but rather ports are used to populate and poll it.
*
* See Time Crisis "SPOT RAM" self test for sample use.
* It is also used in Dirt Dash night section.
*/
#define SPOTRAM_SIZE (320*4)

4
src/mame/video/namcos22.c
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@ -179,7 +179,7 @@ UpdateVideoMixer( running_machine &machine )
16,17,18 global fade rgb
19 global fade factor
1a fade target flags
1b textlayer palette base?
1b textlayer palette base
1c
1d
1e
@ -624,7 +624,7 @@ static void poly3d_DrawQuad(running_machine &machine, bitmap_t *bitmap, int text
*/
/* czattr:
/* czattr: - assumed that it's write-only
0 2 4 6 8 a c e
^^^^ ^^^^ ^^^^ ^^^^ cz offset, signed16 per cztype 0,1,2,3
^^^^ flags, nybble per cztype 3,2,1,0 - 4 probably means enable