Sysfail screen & small changes

042-osdev-08/README.md

@@ -0,0 +1,29 @@
+# Readme
+
+## Changes
+
+- added mode changing to 80x50
+- added terminal backend character attribute changing API
+- added string formatting API (sorry, no floats)
+- reworked source files to use makefile based build system
+
+
+## Building
+
+Now building and cleaning everything is as simple as
+
+```bash
+make clean && make build
+```
+
+In this configuration it uses qemu instead of bochs (which I find kinda slow anyway...). Adding bochs support is relative easy anyway.
+
+
+## Panic Contest
+
+[![Image](http://i.imgur.com/qDneBv1.png)](http://i.imgur.com/qDneBv1.png "Preview")
+
+
+## Author
+
+Karol Grzybowski (2017)

042-osdev-08/build/build.py

@@ -0,0 +1,46 @@
+#!/usr/bin/python
+import os
+import subprocess
+from glob import glob
+
+def fix_stage1_size():
+  stage2_size = os.stat("bootloader/stage2").st_size
+  kernel_size = os.stat("kernel/kernel64.elf").st_size
+
+  stage2_size = (stage2_size + kernel_size + 511) / 512
+
+  if stage2_size >= 255:
+    raise Exception("stage2 & kernel are too large")
+
+  with open("bootloader/stage1", "rb+") as f:
+    d = f.read()
+    idx = d.index("\xb0\xcc\x90\x90")
+    d = bytearray(d)
+    d[idx+1] = stage2_size
+    f.seek(0)
+    f.write(d)
+
+fix_stage1_size()
+
+files_to_img = [
+    "bootloader/stage1",
+    "bootloader/stage2",
+    "kernel/kernel64.elf"
+]
+
+buf = []
+for fn in files_to_img:
+  with open(fn, "rb") as f:
+    d = f.read()
+    print("length: " + str(len(d)))
+    buf.append(d)
+
+    if len(d) % 512 == 0:
+      continue
+
+    padding_size = 512 - len(d) % 512        
+    buf.append("\0" * padding_size);
+
+with open("floppy.bin", "wb") as f:
+  f.write(''.join(buf))
+

042-osdev-08/build/makefile

@@ -0,0 +1,28 @@
+include ../make/macros.mk
+
+clean:
+	$(host.rm) ./floppy.bin
+
+floppy.bin:
+	python ./build.py
+
+
+QEMU_FLAGS = \
+	-m 2048 \
+	-cpu Haswell \
+	-D qemu.log \
+	-d cpu_reset,int,guest_errors \
+	-vga std \
+	-smp 4
+
+QEMU_FLAGS_DEBUG = \
+	-serial file:serial.log
+
+run-qemu: floppy.bin
+	qemu-system-x86_64 --fda $(<) $(QEMU_FLAGS) $(QEMU_FLAGS_DEBUG)
+	cat serial.log
+
+run-bochs: floppy.bin
+
+.PHONY: run-qemu run-bochs
+build: run-qemu