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i4000 - Quad M-module carrier for VMEbus
User Manual Version: 1.2
AcQuisition Technology bv
P.O. Box 627, 5340 AP
Oss, The Netherlands Page 19 of 25
5. FUNCTIONAL DESCRIPTION
5.1. BLOCK DIAGRAM
The interrupt controller used on the i4000 is largely compatible with the MC68153 interrupt controller from
Motorola.
The interrupt controller provides means for the modules to ask for an interrupt of the processor activity and
receive service from the processor. The interrupt controller on the i4000 acts as an interface device
requesting and responding to interrupt acknowledge cycles for up to 4 independent modules.
5.1.1. REGISTER DESCRIPTION
The interrupt controller of the i4000 contains 8 programmable registers. There are four control registers (CR0-
CR3) that control the operation of the interrupt controller and four vector registers (VR0-VR3) that contain the
vector data used during an interrupt acknowledge cycle. Every module is assigned one register pair.
Figure 7 i4000 block diagram