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Make EDID frequency limits sane, fixes Voodoo 3 DDC on Windows 98

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This commit is contained in:
RichardG867
2021-03-18 00:34:33 -03:00
parent 70100da2a7
commit c9af458ddc
1 changed files with 11 additions and 11 deletions
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22
src/video/vid_ddc.c
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@@ -181,18 +181,18 @@ ddc_init(void *i2c)
memset(&edid->descriptors[1].established_timings3.timings, 0xff, sizeof(edid->descriptors[1].established_timings3.timings)); /* all enabled */
edid->descriptors[1].established_timings3.timings[5] &= 0xf0; /* reserved bits */
edid->descriptors[2].tag = 0xfc; /* display name */
memcpy(&edid->descriptors[2].ascii, "86Box Monitor", 13); /* exactly 13 characters (would otherwise require LF termination and space padding) */
edid->descriptors[2].tag = 0xfd; /* range limits */
edid->descriptors[2].range_limits.min_v_field = 45;
edid->descriptors[2].range_limits.max_v_field = 125;
edid->descriptors[2].range_limits.min_h_line = 30; /* 640x480 = ~31.5 KHz */
edid->descriptors[2].range_limits.max_h_line = 115; /* 1920x1440 = 112.5 KHz */
edid->descriptors[2].range_limits.max_pixel_clock = 30; /* 1920x1440 = 297 MHz */
edid->descriptors[2].range_limits.timing_type = 0x00; /* default GTF */
edid->descriptors[2].range_limits.padding[0] = 0x0a;
memset(&edid->descriptors[2].range_limits.padding[1], 0x20, sizeof(edid->descriptors[2].range_limits.padding) - 1);
edid->descriptors[3].tag = 0xfd; /* range limits */
edid->descriptors[3].range_limits.min_v_field = 1;
edid->descriptors[3].range_limits.max_v_field = -1;
edid->descriptors[3].range_limits.min_h_line = 1;
edid->descriptors[3].range_limits.max_h_line = -1;
edid->descriptors[3].range_limits.max_pixel_clock = -1;
edid->descriptors[3].range_limits.timing_type = 0x00; /* default GTF */
edid->descriptors[3].range_limits.padding[0] = 0x0a;
memset(&edid->descriptors[3].range_limits.padding[1], 0x20, sizeof(edid->descriptors[3].range_limits.padding) - 1);
edid->descriptors[3].tag = 0xfc; /* display name */
memcpy(&edid->descriptors[3].ascii, "86Box Monitor", 13); /* exactly 13 characters (would otherwise require LF termination and space padding) */
edid->extensions = 1;
for (uint8_t c = 0; c < 127; c++)