diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/uart.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/uart.c b/kernel/uart.c index 852a085..3a5cdc4 100644 --- a/kernel/uart.c +++ b/kernel/uart.c @@ -15,8 +15,9 @@ // address of one of the registers. #define Reg(reg) ((volatile unsigned char *)(UART0 + reg)) -// the registers. some have different meanings for -// read and write. +// the UART control registers. +// some have different meanings for +// read vs write. // http://byterunner.com/16550.html #define RHR 0 // receive holding register (for input bytes) #define THR 0 // transmit holding register (for output bytes) |