The 386 microcode sequencer has a one-cycle pipeline delay: when a jump or RNI (run next instruction) is decoded, the micro-instruction immediately after it has already been fetched and will execute before the jump takes effect. This "delay slot" is a basic property of the sequencer, and the microcode is written to fill it with useful work rather than waste a cycle on a bubble. The examples in the PTSAV section above show this: at 582/5AE, the micro-instruction after LCALL executes before the subroutine begins.
杜耀豪的母亲与兄弟姊妹的合影，摄于1954年。（受访者供图）
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Word has it that we're also getting a brand-new entry-level MacBook that runs on the A18 chip, the same processor that powered the iPhone 16 and 16 Plus from late 2024. This is according to 9to5Mac, which also reports that the device could start at $699 — the same price point as high-end Chromebooks. It could launch as soon as March alongside the new Airs and Pros.
// Helper to concatenate Uint8Arrays