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View Code? Open in Web Editor NEWA Unix clone OS
License: Other
A Unix clone OS
License: Other
* The provided Makefile: 1) builds a kernel 2) copies it into rootfs/boot/kernel/kernel 3) creates an ISO CD image with the rootfs/ contents * To boot the system in QEMU, run: qemu-system-x86_64 -curses -drive id=boot,format=raw,file=$USER.img,if=none -drive id=data,format=raw,file=$USER-data.img,if=none -device ahci,id=ahci -device ide-drive,drive=boot,bus=ahci.0 -device ide-drive,drive=data,bus=ahci.1 -gdb tcp::9999 Explanation of parameters: -curses use a text console (omit this to use default SDL/VNC console) -drive ... connect a CD-ROM or hard drive with corresponding image -device ... configure an AHCI controller for the boot and data disks -gdb tcp::9999 listen for "remote" debugging connections on port NNNN -S wait for GDB to connect at startup -no-reboot prevent reboot when OS crashes * When using the -curses mode, switch to the qemu> console with ESC-2. * To connect a remote debugger to the running qemu VM, from a different window: gdb ./kernel At the (gdb) prompt, connect with: target remote localhost:9999
When interrupt handler is fired which prints using kprintf, the row and column variables might contain invalid values because of race condition.
Start by reading https://en.wikipedia.org/wiki/Test-and-set#Assembly_implementation
Currently sleep just uses some loops to achieve arbitrary sleep. Use timer to achieve consistent sleep across systems
Use http://www.brackeen.com/vga/basics.html for colour reference
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