Owner`s manual

12
• Program file control
The BASIC program file control commands CHAIN (page 44) and SWAP (page 45)
are for read-out of another program in the memory during the execution of one
program and moving the control to that program.
As shown in the figure below, CHAIN has the same function as the
<goto
"filename">. (For detailed information, please refer to page 26.)
file "ABC"
file "DEF"
10
PRINT "MZ-700" ,.-
10 PRINT "DISK BASIC"
20
20
,
,
,
,
100
CHAIN "DEF"
-
100
END
CHAIN
SWAP has the same function as the <gosub "filename">. After execution of
movement from the currently executing program to a separate program, it
is then
possible to return to the first program. (For detailed information, refer to page 27.)
file "GHI"
file "JKL"
10
PRINT "MZ-700"
,---
10
INPUT A, B
20
!
20
FOR A=B TO A*B
50
SWAP "JKL"
f---
,
IL-
i
200
END 150 END
SWAP
In addition it is also possible to control the various files as utility programs files and
commands of the machine language program files.