Instruction manual

9
I/O Programming
This chapter describes programming considerations and restrictions for I/O
transactions. It covers the following topics:
• I/O read and write restrictions (Section 9.1)
• DMA (Section 9.2)
• Interrupt handling during I/O operations (Section 9.3)
• TURBOchannel usage—system-specific (Section 9.4)
• JUNKIO subsystem (Section 9.5)
• SCSI interface (Section 9.6)
I/O Programming 9–1