CHAPTER 2 NDA-24296
Page 20
Revision 1.0
SN1695 CPRBF-A
CPU Board
SN1695 CPRBF-A
CPU Board
1. General Function
The CPR in 1-IMG, 4-IMG, and IPX-U system consists of the following components.
(a) CPU BOARD: Contains the Main Processor Unit (MPU), ROM, and 128 to 256 Mbyte of Random
Access Memory (RAM). This board may also contain the ISAGT (PZ-GT13/PZ-
GT20) on its Industrial Standard Architecture (ISA) bus, and LANI (PZ-PC19) on
the Peripheral Component Interconnect (PCI).
(b) DSP: Contains the CPR switches and the CPR status indicator lamps.
(c) FDD/HDD: Floppy Disk Drive (FDD) and Hard Disk Drive (HDD) are mounted on a circuit
card, which, if necessary, can be extracted and/or inserted while the system is in
operation.
(d) PWR: Supplies the operating power to the CPR and also the MISC slots of the LPM.
Figure 2-1 Location of SN1695 CPRBF-A (CPR)
LANI
LANI
LANI
LANI
HDD
FDD
HDD
FDD
CPU CPU
DSP
DSP
ISAGT ISAGT
CPR#0 CPR#1
To HUB
To HUB
To HUB
To HUB
To I/O local bus
To MISC bus