Sharp PC-1403 - Page 141

D urin g e x ecuti o n , whe n t h e computer en cou nte r s the C H A I N s tate m e nt , the next
sectio n is c a ll ed into m e m o ry and ex ecu ted . I n this manner , all of the sect i o ns are
eventually r u n .
Note : W h e n a program co nt aini nqa C HA I N command is l oaded fro m a tape by t he
M E R GE co m ma nd , check t o b e sure th at the C HAI N co mma n d i s c orr e c t.
135
/
)
I
File n ame
F il e n am e
"P R 0 - 2" "P R 0-3 "
I
'
File na me
" PR0 - 3 "
Fi le name
"PR 0-2 "
'
T
Fi l e nam e
" PR 0 -2"
F i le name
" PR 0 -3"
'
( " f " i nd ic ates t h e p o sitio n o f the tap e
r e c order head . )
M agne t ic tape
9 9 0 : E N D
E xec ut io n
700: CHAIN " PR0-3 ", 7 10
" PR0 - 3 "
7 1 0 :
f
~ E xecu ti on
1
700 : CHAIN
4 10 :
L
40 0 : C HAI N " P R0-2 ", 4 10
"P R 0 -2"
1 0 :
2 0 :
E x e c u ti o n
400 : CHAIN
" PR0-1 "
F o r e xamp l e, l et's a ssu me you have th r e e pro gram sect i ons n a m e d PR0- 1 , P R 0-2,
PR 0-3 . Each of th e s e se ctio ns ends w i t h a CH AIN state m e n t.
Verbs
CHA I N