Printronix P9212 - Page 49

2–23
Principles of Operation
DATA PROCESSING UNIT (DPU)
PAPER FEED
68010
CONTROLLER
EPROM
From
Host
Computer
To
Hammer
REAL–TIME PROCESSING UNIT
Microprocessor
512 KB
Driver
To
Mech.
Driver
Serial to Host,
Mech. Driver
, and
Control Panel
Parallel
Port
Dot
Plucker
Shared
Memory
Bus
Interface
Fire
Timer IC
Hardware
Control
Hardware
Status
Register
Register
Comm.
Port
8032
Processor
EPROM
16 KB
EPROM
64 KB
SRAM
2 KB
64180
Processor
Bus
Interface
Control
Register
NVRAM
2 KB
(RTPU)
(PFC)
Shared
Shared
ASIC
Serial from
Host Computer
DRAM
512 KB
(FTIC)
Figure 2–15. Hardware Implementation of the CCB