Retrochallenge 2018/09, 2019/03

Begin Again

March 1, 2019

This time for the retrochallenge I am going to continue to write KittyOS. This is where I left off:

• Hierarchial device driver structure
• Working hardware drivers for keyboard, VGA, external memory, serial, spi, sdcard
• 16-bit bytecode interpreter
• Syscall support with some syscalls working

This is what I'm planning for KittyOS (in general) :

• Develop a simple filesystem for the sdcard. (I am also considering alternatives to the traditional filesytem.)
• Integrate a memory allocator, which allocates both internal SRAM and external SRAM
• Finish implementation of enough syscalls to load and run programs from the sdcard, and read/write to the sdcard filesystem.
• Add sound support: The hardware supports it; just need to find more time in the video interrupt to make it work.

How much will I get done in the retrochallenge? Who knows. But I think the first thing to mess around with is dynamic memory allocation.