SiMPLE OS 5.0 "Liberty"

Major release featuring the new Vim-compatible editor, raw-mode TTY support, improved VT100 terminal emulation, POSIX compatibility improvements, foreground process support, and allocator enhancements.

SiMPLE OS v4.4

Green Glass Redesign

SiMPLE OS v4.3 - Fast Multitasking

Highlights:

• Multiple GUI ELF applications
• Improved multitasking stability
• Faster application switching
• Scheduler and GUI improvements
• Various bug fixes

SiMPLE OS v4.2 - Multi-Process Userspace

Highlights:

• Multiple ELF applications can run simultaneously
• Per-process page directories
• Process memory isolation improvements
• EHCI USB compatibility fixes
• Improved process management and diagnostics

SiMPLE OS v4.1

First release with EHCI USB keyboard and mouse support.

SiMPLE OS v4

Added EHCI USB keyboard and mouse support.

v3.1

SYS_SBRK and malloc/free implemented

v3.0

SYS_FORK and SYS_WAIT working

SiMPLE OS v2.4 — Userspace + Syscalls + ELF Execution

Major milestone:

• ELF loader working
• Userspace execution
• sys_write + sys_exit
• Returns cleanly to shell
• Minimal libc
• Multiple user programs

First real userspace release.

SiMPLE OS v2.3 — Userspace Stable

✔ Userspace execution stable\n✔ ELF return fixed\n✔ Ready for syscalls expansion