Printer Controller; Block Diagram (Internal) - Gestetner A193 Service Manual

2.3 BLOCK DIAGRAM (INTERNAL)

Printer Controller

Printer
E n h a n c e
Unit
R O M
R A M
D 5 0 0 1
Z 8 5 2 3 0
R S - 2 3 2 C
LocalTalk
Serial I/F
I/F
2.3.1 Printer Controller
CPU
An Intel i960JF-25 RISC CPU is used. A 50Mhz oscillator is used as the
clock source for both the i960JF-25 and D8905. However, the clock is used
by the i960JF-25 after it is divided by 2 (25Mhz). The PST5920 is used to
provide the system reset for the CPU and D8905.
(A643)
SIMM Slots
D 8 9 0 5
N V
R A M
NIC Connector
Bi-directional
Parallel I/F
1-8
R A M
R O M
C P U
D 9 0 0 1 M F
H D D
Connector
Machine
Interface
A643V500.wmf
SM