VOGONS

No palette update for 4bpp SVGA modes

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First post, by h-a-l-9000

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DOSBox doesn't set a new palette for M_LIN4 graphics modes. The bug might not have surfaced yet because the previous palette was identical.

Index: src/ints/int10_modes.cpp
===================================================================
RCS file: /cvsroot/dosbox/dosbox/src/ints/int10_modes.cpp,v
retrieving revision 1.61
diff -u -r1.61 int10_modes.cpp
--- src/ints/int10_modes.cpp	5 Jul 2007 19:36:53 -0000	1.61
+++ src/ints/int10_modes.cpp	24 Jul 2007 22:29:12 -0000
@@ -912,6 +912,7 @@
 				}
 				break;
 			}
+		case M_LIN4:
 dac_text16:
 			for (i=0;i<64;i++) {
 				IO_Write(0x3c9,text_palette[i][0]);

Reply 1 of 3, by wd

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lin4 is quite rare, but doesn't make much sense to omit the palette set.
Did you check univbe or some bios, or where did it occur?

Reply 2 of 3, by h-a-l-9000

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I found this when fixing the ET4000 palette bug in Vasyls SVGA patch. Didn't really find anything that breaks but M_LIN4 seems not so uncommon with CAD software. I have one that uses M_LIN4 (video mode 6A) but doesn't break because the previos palette is correct. (It does break with ET4000 because the attrib palette pointers are wrong there - it's this sick greenish look).
I've looked at the palette the S3 BIOS sets in that case and it is identical with the text mode palette.

1+1=10

Reply 3 of 3, by wd

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Ok thanks for the infos (and get some serious cad system 😉 ).

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