Force Computers SYS68K/CPU-40, User Manual

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SECTION 4 APPENDIX TO THE HARDWARE USER'S MANUAL
H-5
FUNCTIONAL MODULE
A collection of electronic circuitry that resides on one 1014 board and works together to
accomplish a task.
IACK DAISY CHAIN DRIVER
A functional module which activates the interrupt acknowledge daisy chain whenever an
INTERRUPT HANDLER acknowledges an interrupt request. This daisy chain ensures that
only one INTERRUPTER will respond with its STATUS/ID when more than one has
generated an interrupt request.
INTERRUPT ACKNOWLEDGE CYCLE
A DTB cycle, initiated by an INTERRUPT HANDLER that reads a "STATUS/ID" from an
INTERRUPTER. An INTERRUPT HANDLER generates this cycle when it detects an
interrupt request from an INTERRUPTER and it has control of the DTB.
INTERRUPT BUS
One of the four buses provided by the 1014 backplane. The INTERRUPT BUS allows
INTERRUPTER modules to send interrupt requests to INTERRUPT HANDLER modules.
INTERRUPTER
A functional module that generates an interrupt request on the INTERRUPT BUS and then
provides STATUS/ID information when the INTERRUPT HANDLER requests it.
INTERRUPT HANDLER
A functional module that detects interrupt requests generated by INTERRUPTERS and
responds to those requests by asking for STATUS/ID information.