TM 5-6675-318-14
( 6 ) F l a g r e g i s t e r s . U s e d t o s t o r e f l a g s e t t i n g s ( s e t f l a g o n o r o f f ) . T h e re
are 10 flags available to the operator numbered 0 thru 9. Three flags have estab-
l i s h e d s p e c i a l f u n c t i o n s a s f o l l o w s:
Table 7-3. SPECIAL FUNCTIONS OF FLAGS
Flag
Function
Flag 7
Used to indicate error conditions.
Flag 8
When set, causes calculator to stop program if error occurs
while program is running.
Flag 9
U s e d t o c o n t r o l t r a c e m o d e o f p r i n t / s e c u r i t y c r a d l e . I f s e t,
printer is placed in trace mode.
Flags are set or unset in a program so they can be used for testing and conditional
t r a n s f e r s . O n c e a f l a g i s s e t o r r e s e t , r e p e a t i n g t h e s e t i n s t r u c t i o n , r e p e a t i n g a
r e s e t i n s t r u c t i o n o r t e s t i n g s t a t u s o f a f l a g w i l l n o t a f f e c t s t a t u s o f f l a g o r
c a l c u l a t i o n s . U n l i k e T - r e g i s t e r o r o t h e r r e g i s t e r s , f l a g s t a t u s c a n n o t b e s e e n on
t h e d i s p l a y e x c e p t b y t e s t i n g i t.
e .
Magnetic card memory. Stores or records programs and data not contained in
m a s t e r l i b r a r y m o d u l e . I t c o n s i s t s o f:
Magnetic Card Reader
Magnetic Cards
(1) Magnetic card reader. Transfers data and programs to and from calcula-
tor’s internal memory registers and magnetic cards. Programs stored in calculator's
memory are written onto a card magnetically and can be similarly read from a card
and dumped into the calculator’s memory ready to run. Also, unless protected mag-
netic cards can be erased (i.e., made blank) by recording a card when calculator’s
internal memory is empty or re-recorded with a different program. The magnetic card
reader reads or writes cards one side and one bank at a time.
7-16
