qa.hlp (Table of Contents; Topic list)
Interrupt 15H (I/O Subsystem)
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Interrupt  Fnct  Subfnct    Name
15H        00H              Turn On Cassette Motor
15H        01H              Turn Off Cassette Motor
15H        02H              Read Cassette
15H        03H              Write Cassette
15H        0FH              Format ESDI Drive Periodic Interrupt
15H        21H   00H        Read POST Error Log
15H        21H   01H        Write POST Error Log
15H        4FH              Keyboard Intercept
15H        80H              Device Open
15H        81H              Device Close
15H        82H              Process Termination
15H        83H              Event Wait
15H        84H              Read Joystick
15H        85H              SysReq Key
15H        86H              Delay
15H        87H              Move Extended Memory Block
15H        88H              Get Extended Memory Size
15H        89H              Enter Protected Mode
15H        90H              Device Wait
15H        91H              Device Post
15H        C0H              Get System Environment
15H        C1H              Get Address of Extended BIOS Data Area
15H        C2H              Mouse Pointer (summary screen)
15H        C3H              Set Watchdog Time-Out
15H        C4H              Programmable Option Select
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