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enabled color-PAL to be 8-bits wide instead of just 6-bit. Updated PAL programming accordingly. VIA CMAP8 now supports (indexed) 24-bit color instead of just 18bit. 

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@13813 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Rudolf Cornelissen 2005-07-24 12:11:51 +00:00
parent 8a6f27ebd8
commit 66e18736f6
2 changed files with 13 additions and 11 deletions
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9
src/add-ons/accelerants/via/engine/crtc.c
View File

@ -424,8 +424,11 @@ status_t eng_crtc_depth(int mode)
/* set VCLK scaling */
/* genctrl bit use:
b7: PAL assignment stuff (color-lookup (0) versus gamma (1))?
%1 = very dark image (tested 8-bit mode)
b7: %0 = PAL is 6-bit wide (on b0-5)
%1 = PAL is 8-bit wide
Note:
3123Ax chips only support 6-bits. If we support that chip,
update PAL programming!
b6: ?
b5: %0 = distortions (stripes) only (tested 8-bit mode)
%1 = OK
@ -443,7 +446,7 @@ status_t eng_crtc_depth(int mode)
{
case BPP8:
/* indexed mode */
genctrl = 0x22; //%0010 0010
genctrl = 0xa2; //%1010 0010
break;
case BPP15:
/* direct mode */

15
src/add-ons/accelerants/via/engine/dac.c
View File

@ -111,10 +111,9 @@ status_t eng_dac_palette(uint8 r[256],uint8 g[256],uint8 b[256])
/* loop through all 256 to program DAC */
for (i = 0; i < 256; i++)
{
/* the 6 implemented bits are on b0-b5 of the bus */
ENG_REG8(RG8_PALDATA) = (r[i] >> 2);
ENG_REG8(RG8_PALDATA) = (g[i] >> 2);
ENG_REG8(RG8_PALDATA) = (b[i] >> 2);
ENG_REG8(RG8_PALDATA) = r[i];
ENG_REG8(RG8_PALDATA) = g[i];
ENG_REG8(RG8_PALDATA) = b[i];
}
if (ENG_REG8(RG8_PALINDW) != 0x00)
{
@ -129,11 +128,11 @@ if (1)
ENG_REG8(RG8_PALINDR) = 0x00;
for (i = 0; i < 256; i++)
{
R = (ENG_REG8(RG8_PALDATA) << 2);
G = (ENG_REG8(RG8_PALDATA) << 2);
B = (ENG_REG8(RG8_PALDATA) << 2);
R = ENG_REG8(RG8_PALDATA);
G = ENG_REG8(RG8_PALDATA);
B = ENG_REG8(RG8_PALDATA);
/* only compare the most significant 6 bits */
if (((r[i] & 0xfc) != R) || ((g[i] & 0xfc) != G) || ((b[i] & 0xfc) != B))
if ((r[i] != R) || (g[i] != G) || (b[i] != B))
LOG(1,("DAC palette %d: w %x %x %x, r %x %x %x\n", i, r[i], g[i], b[i], R, G, B)); // apsed
}
}