OS Future

[maxdevos49]

OS Future

MadOS has made great progress and I have accomplished many of my own goals. It currently supports VESA graphics, Dynamic memory, and Interrupt support. I even managed to make a simple PacMan clone to demonstrate the VESA Graphics. A virtual TTY environment even exist within the VESA graphics mode.

The future of MadOS has many features planned. A Kernel Loader, User space and a proper libc with Syscalls. The first new feature to be implemented will be a Kernel Loader. A OS name change may also occur in the future with the name either CassandraOS or devOS being chosen.

Kernel Loader

Currently MadOS only supports BIOS for booting. I want to expand this and support UEFI by restructuring the boot process to have an independent loader based on the architecture present. The OS would remain a ELF based binary while the loader would depend upon the target architecture. A UEFI loader would be PE binary that loads an ELF kernel or a BIOS loader would be a flat binary that loads the ELF kernel.

The kernel loader would require at least the following features in the following order:

• Retrieve Memory Map
• Prepare Long mode with GDT, IDT, and Paging Setup.
• Target Loader Graphics Mode Support
• ACHI/SATA Driver
  • Possible PCI bus enumeration for ACHI/SATA device discovery.
• ELF Binary Loader

The kernel would be required to implement a specific memory structure to inherit from the loader. That memory structure would contain the Memory Map, GDT, IDT, and Graphics Mode Details.