Lab Track

The lab track teaches machine-facing C through small device-shaped exercises. Each lab is split into:

• overview: what the device model is;
• tasks: what you implement and what gaps are intentionally left;
• check: commands, prompts, and external reading.

Sequence

Lab	Device idea	Check
Lab 1	bit masks, CMOS/RTC, BCD	machinelab test rtc
Lab 2	PIT divisors and timer IRQs	machinelab test timer
Lab 3	i8042 keyboard and scancodes	machinelab test kbd
Lab 4	PS/2 mouse packets	machinelab test mouse
Lab 5	VBE framebuffer and sprites	machinelab test graphics
Lab 6	AC97-lite PCM audio	machinelab test audio
Lab 7	16550 UART and serial protocols	machinelab test uart

Method

1. Read the overview.
2. Run the failing starter test.
3. Implement the requested functions.
4. Keep reusable helpers small.
5. Produce one artifact: test output, screenshot, WAV, trace, or replay.

TIP

Fresh stubs are expected to fail. The first failure is the starting point, not evidence that setup is broken.