Zeal 8-bit OS Release v0.1.0
First public release. Keep in mind this is a still a beta, that is not complete and may still have bugs.
The Operating System is divided in two parts: the kernel, common to all targets and the targets implementation.
Kernel features
The kernel support the following features:
The kernel itself supports the following features:
- Mono-threaded system
- Up to 26 disks (A to Z)
- Support for files and directories
- Support static drivers, provided at compile time
- Separation between user space and kernel space (no memory protection)
- Abstract "opened devices" which can represent an opened file, directory, or driver in the user space
- Support for Real-Time Clock
- Support for timer, can be a hardware or a software timer
- Support up to 16MB of physical address space divided as 256 banks of 16KB
- Support the following operations for dirvers: open, read, write seek, close, ioctl
- Support the following operations for files: open, read, write, seek, close, remove
- Support the following operations for directories: open, browse, close, remove
- Load raw binaries as init file
- Syscalls to perform communication between user programs and kernel
- Support for file systems: rawtable implemented
- Modular build system, simplifying adding files and targets to the compilation, configurable build with
menuconfig
Target support
Zeal 8-bit Computer target is currently the only supported target, with the following features:
- Use the ROM as a read-only disk formatted in "romdisk" file system
- Support for the MMU
- PS/2 Keyboard input
- Partial Video 640x480 text mode support
- Partial PIO implementation for system port (port B)
- Add a command line interface,
init.bin, to execute on boot