diff options
Diffstat (limited to 'src/userspace/libc')
| -rw-r--r-- | src/userspace/libc/stdio/putch.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/src/userspace/libc/stdio/putch.c b/src/userspace/libc/stdio/putch.c index f87680e..2dad6dc 100644 --- a/src/userspace/libc/stdio/putch.c +++ b/src/userspace/libc/stdio/putch.c @@ -1,8 +1,22 @@ #include <syscall.h> +int is_transmit_empty() +{ + u8 value; + asm volatile("inb %1, %0" : "=a"(value) : "Nd"(0x3f8 + 5)); + return value & 0x20; +} + void putch(char ch) { + while (is_transmit_empty() == 0) + ; + asm volatile("outb %0, %1" ::"a"(ch), "Nd"(0x3f8)); +} + +/*void putch(char ch) +{ // TODO: Implement framebuffer writing //if (ch != 0) //syscall_putch(ch); -}
\ No newline at end of file +}*/
\ No newline at end of file |