2 Commits

Author	SHA1	Message	Date
AI	3512e937ae	Fix keyboard init: add timeout to controller flush loop ... The PS/2 keyboard controller flush loop could hang infinitely on some VMs (UTM) where the controller keeps reporting data. Add a 1024-byte timeout to prevent the kernel from hanging during keyboard_init(). Also add debug prints showing flush progress for diagnostics.	2026-02-23 13:48:33 +00:00
AI	c25ba1fccd	feat: shell (sh) with keyboard driver, SYS_READ, SYS_EXEC ... - PS/2 keyboard driver: IRQ1 handler, scancode set 1 translation, ring buffer, shift key support - SYS_READ (fd=0): non-blocking keyboard read for stdin - SYS_YIELD: calls schedule_tick directly (no nested INT 0x80) - SYS_EXEC: loads binary from CPIO initrd, replaces process image - User-space libc: crt0.S (C runtime startup), syscalls.h (inline syscall wrappers, basic string functions) - Shell app (sh): readline with echo/backspace, builtins (cd, env, help, exit), fork+exec for external commands - Updated build_apps.sh: C app support with crt0 linking, libc include path, .bss section in objcopy Tested: shell boots, keyboard input works, hello-world runs via fork+exec, env shows CWD, exit cleanly terminates.	2026-02-23 13:08:06 +00:00