Figure 2-3: Hap-6 Board - PictureTel Concorde 4500 Servicing Manual

The following are block diagrams of the HAP-6 and HAP-4 boards.
PR3
PR2
PR1
PR0
ID reg
DMA bus_1
DMA bus_0
Multibus data
Multibus address

Figure 2-3: HAP-6 Board

PR0-3
multibus
address
decode
PR0-3
multibus
arbiter
Clock
and
reset
PR4-7
multibus
address
decode
PR4-7
multibus
arbiter
Interrupt
request
register
Backplane
PR7
PR6
2-7