IPL:
- IPL 指的是可以啟動載入並執行作業系統的裝置。他包含了像是 Floppy, Hard drives, CD-ROM, PCMCIA conrtollers/cards, PnP Cards, Legacy cards 甚至像是 Network, Serial port, Parallel port 等等可開機的實體或虛擬裝置。
- 所有的 IPL 可以被歸類成下列三種
- 1. BAID
- 2. PnP Card (可再細分為 BCV 和 BEV 兩種裝置)
- 3. Legacy IPL Device
- 是 80x86 的 BIOS 中斷之一(又稱冷開機中斷),
- This vector is taken after the POST in order to attempt to load and
- execute any bootstrap code on diskette or hard disk.
- 在呼叫之後,它會根據 IPL Priority 中的裝置,呼叫其 Boot handler
- A BIOS Aware IPL Device is any device that can boot an O/S, but requires the BIOS to have specific code to support it.
- (No Option ROM, 通常啟動的程式碼內建於 INT 19h (BIOS Bootstrap loader) 的服務之中)
- A Bootstrap Entry Vector is a pointer that points to code inside an option ROM that will directly load an O/S. The BEV resides in a PnP option ROM Expansion Header. (for LAN )
- A Boot Connection Vector is a pointer that points to code inside the option ROM that will perform device initialization, detect if a peripheral (such as a SCSI hard drive) is attached, and optionally hook INT 13h.
- Floppy
- HDD → BCV table inside
- CD-ROM
- BEV #1
- BEV #2
- SATA/PATA
- Cards/EMMC
- USB
- BCV #1
- BCV #2