Xerox 550 User Manual

Instruction in memory:
o 1 2
Instruction in instruction register:
Indi rect
reference addresses:
Contents
of indirect reference address:
Address used if bit 0 = 1:
Displacement
aligned for halfword indexing:
Final
effective address:
Figure
9. Generation of Effective Virtual Address (Indirect Real-Extended Addressing)
The
stack pointer doubJeword for push-down instructions
contains a 2O-bit word address for the top of stack address
field; as shown in the following format:
24 Me i n Memory
During real-extended addressing memory write protection
is invoked.
Table 1 summarizes the addressing
characteristics.

Xerox 550 Specifications

General

Monthly Duty Cycle	Up to 300, 000 pages
Connectivity	Ethernet, USB
Print Speed (Color)	Up to 50 ppm
Duplex Printing	Standard
Printer Type	Laser
Supported Operating Systems	Windows, macOS, Linux
Paper Size	A4, Legal, Letter