[boot] Read stuff

Makefile

@@ -98,6 +98,8 @@ bootloader/stage2.bin: bootloader/stage2/main.o bootloader/stage2/start.o bootlo
 	@${LD} -o bootloader/stage2.bin -T bootloader/stage2/link.ld bootloader/stage2/start.o bootloader/stage2/main.o
 	@${ECHO} "\r\033[32;1m   ld   $<\033[0m"
 
+testdisk: bootloader/stage1.bin bootloader/stage2.bin
+	cat bootloader/stage1.bin herp bootloader/stage1.bin > testdisk
 
 ###############
 #    clean    #

bootloader/stage1/main.c

@@ -19,6 +19,14 @@ void kprint(short s)
 int main() {
 	kprint((short)(int)"Welcome to C!\r\n");
 
+	__asm__("calll _readn");
+
+	kprint((short)(int)"Contents of 0x7e00:\r\n");
+	kprint(0x7e00);
+	kprint((short)(int)"[end]\r\n");
+
+
+
 	/* And that's it for now... */
 	__asm__ __volatile__ ("hlt");
 	while (1) {};

bootloader/stage1/start.s

@@ -19,6 +19,7 @@
 
 .global _start
 .global _print
+.global _readn
 _start: 
         movw $0x00,%ax   # Initialize segments...
         movw %ax,%ds     # ... data
@@ -37,6 +38,19 @@ _start:
         calll _print     # ...
         hlt
 
+_readn:
+        movw $0x0000, %ax # We are segment 0...
+        movw %ax, %es
+        movw $0x7e00, %bx # Address to put output
+        movb $0x01, %al   # Count
+        movb $0x00, %ch   # Track
+        movb $0x02, %cl   # Sector
+        movb $0x00, %dh   # Head
+        movb $0x80, %dl   # Disk
+        movb $0x02, %ah   # Command number
+        int  $0x13
+        retl
+
 _print: 
         movb $0x0E,%ah # set registers for
         movb $0x00,%bh # bios video call