Xerox 550 User Manual

PSS Operations
PLS Operations
initial TSA -
-
terminal TSA = initial TSA-28
+1
(RO) -27
+2
(R1) -26
+3
(R2)
-25
+4 (R3) -24
+5
(R4) -23
+6 (R5) -22
+7 (R6)
-21
+8
(R7)
-20
+9 (R8)
-19
+10
(R9)
-18
+11
(RlO)
-17
+12 (Rll )
-16
+13 (R12)
-15
+14 (R13)
-14
+15 (R14)
-13
+16 (R15)
-12
+17
-11
+18
-10
+19 -9
+20
-8
+21
-7
+22
-6
+23
-5
+24
+25
(PSW1)
-3
+26
(PSW2)
-2
+27
(PSW3)
t -1
initial TSA
+28 (PSW4)
-
initial TSA
tAs a function of the hardware, the contents of these 8 locations are in-
determinate after a PSS instruction and ignored by a PLS instruction. These
locations are reserved for future enhancements and must not be used.
Figure 12.
Typical 28-Word Portion of Memory Stack for PSS and PLS
86 Push-Down Instructions (Privileged)

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