minor experiments

3 files changed, 24 insertions, 1 deletions

diff --git a/kernel/interrupts.h b/kernel/interrupts.h
index 7c3e119..5542801 100644
--- a/kernel/interrupts.h
+++ b/kernel/interrupts.h
@@ -5,6 +5,6 @@
 
 #define INT_MAX 255 // size of our interrupts table
 
-int int_unhandled=0; // counting unhandled interrupts
+int int_unhandled; // counting unhandled interrupts
 
 #endif
diff --git a/kernel/kernel.c b/kernel/kernel.c
index 7118706..a25ba83 100644
--- a/kernel/kernel.c
+++ b/kernel/kernel.c
@@ -36,6 +36,22 @@ void kernel_main()
     timer_init();
     scr_put_string_nl("Configured PIT Channel 0 : Mode 2 : 1/25 s.");
 
+    //probe memory
+    scr_put_string_nl("Probing core memory...");
+    char *prober=0xf000;
+
+    for(;prober<0xfffffff;prober+=0xf00)
+    {
+	*prober='x';
+	if(*prober!='x')break;
+    
+    }
+
+    //0xA5000
+    scr_put_hex((uint32_t)prober>>16);
+    scr_put_hex((uint32_t)prober&0xffff);
+    scr_put_string_nl(" finished!");
+
 
     // init and interrupt decriptor table 
     int_init(0x08);
diff --git a/kernel/shell.c b/kernel/shell.c
index 837a4c3..4507931 100644
--- a/kernel/shell.c
+++ b/kernel/shell.c
@@ -1,4 +1,5 @@
 #include "kernel.h"
+#include "interrupts.h"
 
 #define COMMAND_LENGTH 255
 
@@ -66,6 +67,12 @@ void shell_execute()
 	scr_put_hex(timer16);
 	scr_put_string_nl("  seconds passed since system start.");
     }
+    else if(1==strcmp(command,"INT"))
+    {
+	scr_put_string_nl("  getting count of unhandeled interrupts");
+	scr_put_string("  ");
+	scr_put_hex(int_unhandled);
+    }
     else
     {
 	scr_put_string_nl("  unsupported command, sorry!");