diff options
Diffstat (limited to 'vgasrc/stdvga.c')
| -rw-r--r-- | vgasrc/stdvga.c | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/vgasrc/stdvga.c b/vgasrc/stdvga.c index da67af41..eac0357b 100644 --- a/vgasrc/stdvga.c +++ b/vgasrc/stdvga.c @@ -18,19 +18,32 @@ * Attribute control ****************************************************************/ +// Emulate CGA background setting via VGA palette index registers void -stdvga_set_border_color(u8 color) +stdvga_set_cga_background_color(u8 color) { + // Set the background color (via palette index 0) u8 v1 = color & 0x0f; if (v1 & 0x08) v1 += 0x08; stdvga_attr_write(0x00, v1); + // Dim/brighten foreground (see pal_cga[] in stdvgamodes.c) int i; for (i = 1; i < 4; i++) stdvga_attr_mask(i, 0x10, color & 0x10); } +// Emulate CGA palette setting by altering VGA palette index registers +void +stdvga_set_cga_palette(u8 palid) +{ + // Switch foreground colors (see pal_cga[] in stdvgamodes.c) + int i; + for (i = 1; i < 4; i++) + stdvga_attr_mask(i, 0x01, palid & 0x01); +} + void stdvga_set_overscan_border_color(u8 color) { @@ -44,14 +57,6 @@ stdvga_get_overscan_border_color(void) } void -stdvga_set_palette(u8 palid) -{ - int i; - for (i = 1; i < 4; i++) - stdvga_attr_mask(i, 0x01, palid & 0x01); -} - -void stdvga_set_all_palette_reg(u16 seg, u8 *data_far) { int i; |