From 4cf229ee3a950804d4b6c8f70511839e2d772fc4 Mon Sep 17 00:00:00 2001
From: Jasmine Iwanek <jasmine@iwanek.co.uk>
Date: Sat, 5 Nov 2022 21:43:42 -0400
Subject: [PATCH] Port the very basic serial console from mtrr

It's enabled by the flag ENABLE_SERIAL CONSOLE
---
 src/device/serial.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/device/serial.c b/src/device/serial.c
index 48f206f84..16573c82f 100644
--- a/src/device/serial.c
+++ b/src/device/serial.c
@@ -51,6 +51,7 @@ enum {
 static int             next_inst = 0;
 static serial_device_t serial_devices[SERIAL_MAX];
 
+//#define ENABLE_SERIAL_CONSOLE 1
 #ifdef ENABLE_SERIAL_LOG
 int serial_do_log = ENABLE_SERIAL_LOG;
 
@@ -193,6 +194,15 @@ serial_transmit(serial_t *dev, uint8_t val)
         write_fifo(dev, val);
     else if (dev->sd->dev_write)
         dev->sd->dev_write(dev, dev->sd->priv, val);
+#ifdef ENABLE_SERIAL_CONSOLE
+    if ((val >= ' ' && val <= '~') || val == '\r' || val == '\n') {
+        fputc(val, stdout);
+        if (val == '\n')
+            fflush(stdout);
+    } else {
+        fprintf(stdout, "[%02X]", val);
+    }
+#endif
 }
 
 static void