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authorKevin O'Connor <kevin@koconnor.net>2024-04-01 11:27:57 -0400
committerKevin O'Connor <kevin@koconnor.net>2024-04-05 17:59:49 -0400
commit22c91412600b7fabd75ef68d2d4d3e63e9e27f9f (patch)
treeabb90c85d63f6b0babf43316481130be82b89063
parent549463dbc055b4a0abcf2548621ae18c23934465 (diff)
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stdvga: Rename stdvga_get_vde() to stdvga_get_vertical_size()
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
-rw-r--r--vgasrc/stdvga.c8
-rw-r--r--vgasrc/stdvga.h2
-rw-r--r--vgasrc/vgabios.c4
3 files changed, 7 insertions, 7 deletions
diff --git a/vgasrc/stdvga.c b/vgasrc/stdvga.c
index a5972ba..4bfa101 100644
--- a/vgasrc/stdvga.c
+++ b/vgasrc/stdvga.c
@@ -275,15 +275,15 @@ stdvga_set_character_height(u8 lines)
stdvga_crtc_mask(stdvga_get_crtc(), 0x09, 0x1f, lines - 1);
}
-// Get vertical display end
+// Get vertical screen size (number of horizontal lines in the display)
u16
-stdvga_get_vde(void)
+stdvga_get_vertical_size(void)
{
u16 crtc_addr = stdvga_get_crtc();
u16 vde = stdvga_crtc_read(crtc_addr, 0x12);
u8 ovl = stdvga_crtc_read(crtc_addr, 0x07);
- vde += (((ovl & 0x02) << 7) + ((ovl & 0x40) << 3) + 1);
- return vde;
+ vde += ((ovl & 0x02) << 7) + ((ovl & 0x40) << 3);
+ return vde + 1;
}
// Get offset into framebuffer accessible from real-mode 64K segment
diff --git a/vgasrc/stdvga.h b/vgasrc/stdvga.h
index 439930a..1828585 100644
--- a/vgasrc/stdvga.h
+++ b/vgasrc/stdvga.h
@@ -66,7 +66,7 @@ int stdvga_vram_ratio(struct vgamode_s *vmode_g);
void stdvga_set_cursor_shape(u16 cursor_type);
void stdvga_set_cursor_pos(int address);
void stdvga_set_character_height(u8 lines);
-u16 stdvga_get_vde(void);
+u16 stdvga_get_vertical_size(void);
int stdvga_get_window(struct vgamode_s *curmode_g, int window);
int stdvga_set_window(struct vgamode_s *curmode_g, int window, int val);
int stdvga_minimum_linelength(struct vgamode_s *vmode_g);
diff --git a/vgasrc/vgabios.c b/vgasrc/vgabios.c
index a68cae1..3659f01 100644
--- a/vgasrc/vgabios.c
+++ b/vgasrc/vgabios.c
@@ -138,8 +138,8 @@ set_character_height(u8 lines)
{
stdvga_set_character_height(lines);
SET_BDA(char_height, lines);
- u16 vde = stdvga_get_vde();
- u8 rows = vde / lines;
+ u16 vertical_size = stdvga_get_vertical_size();
+ u8 rows = vertical_size / lines;
SET_BDA(video_rows, rows - 1);
u16 cols = GET_BDA(video_cols);
SET_BDA(video_pagesize, calc_page_size(MM_TEXT, cols, rows));