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More bits for linear frame buffer

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This commit is contained in:
Ray Chason
2020-01-25 14:23:04 -05:00
committed by Pasi Kallinen
parent 8d9f31e91f
commit aa3303cafc
1 changed files with 19 additions and 7 deletions
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26
sys/msdos/vidvesa.c
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@@ -925,18 +925,21 @@ unsigned mode;
if (mode == MODETEXT) {
iflags.grmode = 0;
memset(&regs, 0, sizeof(regs));
regs.x.ax = mode;
(void) __dpmi_int(VIDEO_BIOS, &regs);
} else if (mode >= 0x100) {
iflags.grmode = 1;
memset(&regs, 0, sizeof(regs));
regs.x.ax = 0x4F02;
regs.x.bx = mode & 0x81FF;
regs.x.bx = mode;
(void) __dpmi_int(VIDEO_BIOS, &regs);
/* Record that the window position is unknown */
vesa_win_pos[0] = 0xFFFFFFFF;
vesa_win_pos[1] = 0xFFFFFFFF;
} else {
iflags.grmode = 0; /* force text mode for error msg */
memset(&regs, 0, sizeof(regs));
regs.x.ax = MODETEXT;
(void) __dpmi_int(VIDEO_BIOS, &regs);
g_attribute = attrib_text_normal;
@@ -1057,12 +1060,21 @@ vesa_detect()
vesa_pixel_size = mode_info.BitsPerPixel;
vesa_pixel_bytes = (vesa_pixel_size + 7) / 8;
if (vbe_info.VbeVersion >= 0x0300) {
vesa_red_pos = mode_info.RedFieldPosition;
vesa_red_size = mode_info.RedMaskSize;
vesa_green_pos = mode_info.GreenFieldPosition;
vesa_green_size = mode_info.GreenMaskSize;
vesa_blue_pos = mode_info.BlueFieldPosition;
vesa_blue_size = mode_info.BlueMaskSize;
if (mode_info.ModeAttributes & 0x80) {
vesa_red_pos = mode_info.LinRedFieldPosition;
vesa_red_size = mode_info.LinRedMaskSize;
vesa_green_pos = mode_info.LinGreenFieldPosition;
vesa_green_size = mode_info.LinGreenMaskSize;
vesa_blue_pos = mode_info.LinBlueFieldPosition;
vesa_blue_size = mode_info.LinBlueMaskSize;
} else {
vesa_red_pos = mode_info.RedFieldPosition;
vesa_red_size = mode_info.RedMaskSize;
vesa_green_pos = mode_info.GreenFieldPosition;
vesa_green_size = mode_info.GreenMaskSize;
vesa_blue_pos = mode_info.BlueFieldPosition;
vesa_blue_size = mode_info.BlueMaskSize;
}
} else {
switch (vesa_pixel_size) {
case 15: