OP = 90
AF Length of the A Syllable data field. May be indirect. A value
of 00 indicates that there are no units to be moved. A literal flag
will cause an Invalid Instruction (IEX = 21) fault.
BF is an eight-bit kernel request code. May be specified as indirect.
The A Syllable is the address of the kernel data field. Address may be indexed, indirect or extended. The final address controller must be UN or cause an Invalid Instruction (IEX = 03) fault.
The Kernel Request instruction is a programmatic method for requesting services from the kernel of the MCP.
This instruction may only be executed with Privileged Enable set or an Invalid Instruction (IEX = 02) fault is reported.
The following steps are performed to accomplish this operation:
The Comparison Flags are not affected by this instruction.
Field overlap is not applicable to this instruction.