rs-dos/src/interrupts.rs, branch qemu

restructure: rsnix kernel + shell crate + rsdos entry point

2026-07-31T00:58:31Z

Architecture: rs-dos/ (workspace root, was raisernics/) ├── rsnix/ — kernel lib crate (uefi, serial, gop, ps2, interrupts, memory) ├── shell/ — shell lib crate (prompt, commands, line input) ├── rsdos/ — binary crate (efi_main, init, panic handler) └── rsboot/ — future git submodule No functional changes — boots to shell prompt identically. Version auto-pulled from Cargo.toml via env!("CARGO_PKG_VERSION").

fix: ISR dispatch calling convention + PS/2 interrupt enable

2026-07-31T00:40:18Z

Root cause: x86_64-unknown-uefi uses the Microsoft x64 calling convention where the first argument is passed in rcx, not rdi. The ISR stub was setting rdi = rsp, but isr_dispatch() read the frame pointer from rcx, getting garbage → triple fault. Also: - Enable PS/2 keyboard IRQ via controller config byte (bit 0). - Expose read_scancode() and TICKS from interrupt module. - ps2::poll_key() uses 'sti; hlt' race-free sleep pattern.

interrupts: IDT, PIC remap, PIT timer, PS/2 keyboard IRQ

2026-07-31T00:28:10Z

- IDT with 256 entries, loaded via lidt (CS read from current context) - PIC 8259A remapped to vectors 32-47, timer+keyboard IRQs unmasked - PIT channel 0 at ~100 Hz (mode 2, rate generator) - PS/2 keyboard IRQ (IRQ1 → vector 33): reads port 0x60, pushes byte to lock-free SPSC ring buffer - Timer IRQ (IRQ0 → vector 32): sends EOI, increments tick counter - ps2::poll_key() now reads from ring buffer with cli/sti+hlt for race-free sleep (instead of busy-polling the data port) - build.rs: use idiomatic Result<_, Box> return type - tools/qemu.sh: fix SC2207 shellcheck warning