Tag
interrupt-handling
- Oct 24, 2026 Signals as Deferred Interrupts and the Async-Signal-Safe Subset How a signal handler interrupts an arbitrary instruction, why most library calls are unsafe inside one, and what the small permitted subset actually guarantees. computing history
- Apr 9, 2026 Channel Programs: How a Mainframe Moved Data Without the CPU The command word format a channel executes, how chaining turns a list of commands into one operation, and why the channel is a separate processor rather than a DMA engine. computing history
- Jun 23, 2025 Deferred Interrupt Work: Splitting Handlers from Processing Why the top half of a handler should only acknowledge and wake, how the bottom half runs at a chosen priority, and what the split costs in latency. embedded systems