From 1ec50c5848010f607d286228955adb50c05c53ca Mon Sep 17 00:00:00 2001 From: Robert Morris Date: Sun, 28 Jul 2019 07:43:22 -0400 Subject: [PATCH] xxx --- kernel/uart.c | 5 +++-- 1 file 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)