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gbos - a tiny Unix-flavored OS for the Game Boy Color (kernel, shell, coreutils in C, RAM filesystem)
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*
kernel: per-process sleep - two sleepers used to deadlock each other
user
2026-09-22
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term+libc: batched write rendering - one tile render per write(), 2.3x lines
user
2026-07-18
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kernel: CGB double-speed mode - 2x everything (1.99x measured)
user
2026-07-18
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kernel: a real timer source (64 Hz tick IRQ) + uptime(1)
user
2026-07-18
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kernel: dmesg-style boot spew before init spawns
user
2026-07-18
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net: pump the network from the console wait (answer pings at the prompt)
user
2026-07-17
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kernel: sys_sleep - a cooperative delay off the DIV timer (+ ping pacing)
user
2026-07-17
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net: keep network packets out of the console (fixes shell garbage on netboot)
user
2026-07-17
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fs rewrite stage 3: nested directories, paths, cwd (cd/mkdir/ls)
user
2026-07-16
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fs rewrite stage 2: inodes + root directory (block-based, persistent)
user
2026-07-16
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kill + ps: implement SYS_KILL (pid 1 immortal) and a ps tool
user
2026-07-16
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shell: I/O redirection (>/<) and pipes (|); rewrite shell in C
user
2026-07-16
*
filesystem: a RAM FS (WRAMX) + ls/cat/save/rm; wc/head read files
user
2026-07-16
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kernel: complete the process lifecycle (exit/wait/reap + bank free list)
user
2026-07-16
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kernel: implement fork()
user
2026-07-15
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gbos scaffold: working cooperative microkernel (verified ABAB in emulator)
user
2026-07-15