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Move cursor in terminal when writing to it

This commit is contained in:
Bananymous 2022-11-15 09:26:14 +02:00
parent 3bc4d7d39b
commit 7c06c75d6c
2 changed files with 25 additions and 0 deletions
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24
kernel/arch/i386/tty.cpp
View File

@ -56,6 +56,28 @@ void terminal_clear_line(size_t line)
terminal_putentryat(' ', terminal_color, x, line);
}
static inline void outb(uint16_t port, uint8_t value)
{
asm volatile ("outb %0, %1" : : "a" (value), "Nd" (port));
}
static void terminal_update_cursor()
{
uint16_t pos = terminal_row * VGA_WIDTH + terminal_col;
outb(0x3D4, 0x0F);
outb(0x3D5, (uint8_t) (pos & 0xFF));
outb(0x3D4, 0x0E);
outb(0x3D5, (uint8_t) ((pos >> 8) & 0xFF));
}
void terminal_set_cursor_pos(int x, int y)
{
terminal_row = y;
terminal_col = x;
terminal_update_cursor();
}
void terminal_putchar(char c)
{
if (c == '\n')
@ -84,6 +106,8 @@ void terminal_putchar(char c)
terminal_col = 0;
terminal_row = VGA_HEIGHT - 1;
}
terminal_update_cursor();
}
void terminal_write(const char* data, size_t size)

1
kernel/include/kernel/tty.h
View File

@ -8,3 +8,4 @@ void terminal_initialize();
void terminal_putchar(char c);
void terminal_write(const char* data, size_t size);
void terminal_writestring(const char* data);
void terminal_set_cursor_pos(int x, int y);