Xerox 560 Reference Manual

Table 9. Status Word 0
Field Bits Comments
0
Reserved
1
Power status
2-7
Memory un i t error cod e
8-9
Memory type
Ports
10
Port 1 enabled
11 Port 2 enabled
12
Port 3 enabled
13
Port 4 enabled
14 Port 5 ena bl ed
15
Port 6 enabled
16
Port 1 serv iced
17
Port 2 serviced
18 Port 3 serviced
19
Port 4 serviced
20 Port 5 serviced
21
Port 6 servi ced
Memory fau I t 22
0
types
23
Uncorrectable memory unit error
24
Memory module
selection error
,..e:
A 1.1. ____ . _____ !L __________
Lv
/",,\UUIC;:);:) pUllly CliVI
26
Data in
parity error
27
Write lock
parity error
28
Port selection error
29 Undefined
operation
30
Control error
31
Multiple error
For
IIread and inhibit parityll operations, the status of the
word loaded (if any) is stored in the condition code bits at
the conclusion of execution as follows:
CC 1: Memory Parity Error (from memory)
CC2: Data Bus Check (from CPU)
CC3: Parity
Bit (from memory)
CC4: 0
T abl e 10. Status Word 1
Field Bits
Comments
0
Interleave switch ON
1-3
Memory un it size:
000
8K
001 16K
010
24K
011
32K
100 40K
101
48K
110
56K
111 64K
4-6 Memory unit number (binary code)
Starting
7 Starting address bit 12
Address
8 Starting address
bit 13
9 Starting address bit 14
10 Starting address bit 15
11 Starting address bit 16
12
Starting_ address bit 17
13
Starting address bit
18
14
Reserved
15-31
Address
received, bits 15-31
WAIT WAIT
(Word index al ignment, privileged)
WAIT causes the basic processor to cease all operations until
an interrupt activation occurs, or until the operator puts
the basic processor in the IDLE mode and then back to RUN
(see Chapter 5). The instruction address portion of the PSWs
is updated before the basic processor begins waiting; there-
fore, while it is waiting, the INSTRUCTION ADDRESS indi-
cators contain the virtual address of the next location in
ascending sequence after WAIT and the contents in the next
location are displayed in the DISPLAY indicators on the
processor control console. If any input/output operations
are being performed when WAIT is executed, the operations
proceed to their normal termination.
When an interrupt activation occurs while the basic pro-
cessor is waiting, it processes the interrupt-servi cing routine.
Normally, the interrupt-servicing routine begins with an
XPSD instruction in the interrupt location, and ends with
an LPSD instruction at the end of the routine. After the
LPSD instruction is executed, the next instruction to be ex-
ecuted in the interrupted program is the next instruction in
sequence after the WAIT instruction. If the interrupt is to a
Control Instructions 119

Xerox 560 Specifications

General

Brand	Xerox
Model	560
Category	Printer
Language	English