RCA Spectra 70 Training Manual

character transferred is generated in each position
of the receiving area.
As an example, assume 120-character area is to be
filled with blanks. It is known that a blank (40)16
appears in the first position.
The area is allocated as follows:
NAME OPERATION
OPERAND
ORG
5000
PRNT
DC
X'EO'
DS
119C
The name PRNT is assigned the address 5000. The
area is cleared by the following instruction:
NAME OPERATION
OPERAND
HSKP
MVC
PRNT+1(119) , PRNT
The following diagram illustrates the overlapping
of the sending area by the receiving area.
SENDING AREA
Ii:"'"
/ \
1~5:: =-----l\ ~L----XXXXXXX_____l51~91
I \~ ____________ ~7~
PRNT RECEIVING AREA
Upon completion of the execution of the instruction
the area 5000 to 5119 will be filled with the Blank
(EO) 16 character.
Exercise:
For the purpose of this exercise, assume memory
to be allocated as follows:
NAME
OPERATION
OPERAND
ORG
2000
WORK
DS
5C
NAME
DS
10C
BAL DS
6C
DATA
DS 5C
ORG
2100
WA1
DS
26C
PART I
Write the instructions to perform the following oper-
25
ations. Place your answers in the space provided.
1. Move 'Work' to 'Data'
2. Zero fill the 'Bal' field. (Assume the first byte
of 'Bal' is a zero.)
3. Clear the 'Work' and 'Name' fields to blanks.
(Assume the first byte of 'Work' is a blank.)
ANSWERS
NAME
OPERATION OPERAND
1.
2.
PART II
Assume areas allocated as shown on Line 1. How
would the area called WA1 appear after execution of
the four instructions below?
Line 1
00 01 02
Line 2
4.
5.
6.
7.
NAME
PART III
OPERATION
OPERAND
MVC WA1(4) , WORK+2
MVC
W A1 +20(6), NAME+5
MVC
WA1+4(1) , WORK+1
MVC
WA1+S(15), WA1+4
Each record on an input tape contains the following
fields of data. NO OF
ITEM
CHARS
---
Account No.
8
Name
25
Type Account
3
Street Address
20
City State Code
2
Credit Code
5
Balance
8
Total Purchases
8
Total Returns
8

RCA Spectra 70 Specifications

General

Brand	RCA
Model	Spectra 70
Category	Computer Hardware
Language	English