Sharp PC-1500 - Page 135

130
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CD ENTRY ADDRESS
D461H
• Subrout ine must be ca lled in th e follow i ng format:
SJP 046 1 H
DB FAH
UB DATA . .. • .. (Decides th e address to return when an erro r is met.)
CD EXIT ST ATE
• When no er ror
The l ead i ng address of t he va riable is stored in the Urcg. and the variable n ame and
the data
si :.:c is stor ed in the ar i thmet ic regist er X. Then, it re turn s to th e ad d res:; that
follows
DB DATA
7 A!l 5H 7 A0'6H 7 A0 7H
UH
Ul
i 10001000
Numeric variable
UH UL
I o xxxxxxx I
Nonnumeric vari ab le
Leadi
ng ad dr ess Size secured
of variable for the v ar i ab le
• Wh en er ror
Returns to the
addr ess that data plus one is added to t h e~ data wri11cn addre ss " af ter
stori
ng the er ror code is stored in U H .
• Key scan (I)
CD ENTRY PREPARAT I ON
• No ne
0 ENTRY ADDRESS
E42CH
CD EX IT ST A TE
• The ke y code of the key that de pr essed at that tim e is stored in the accumulato r.
If there is no key depre ss ion. "'OOH "' wi ll be stored in th e accurnulalO r.
• Key s can (II)
CD ENTRY PREPARAT I ON
• 1\one
CD ENTRY ADDRESS
E 243 H
CD EXIT STATE
• The key code of newly depre sse d ke y is stored in the accumul ator. A lthough il do es
not rct urn unti l a next key is depre ssed. it may end in auto -power- off un less a ke y is
dep ressed wi thi n seve n minutes . (However. the previous state resumes wi1h
.. ,M
dep ress i on of 1hc (][) ke y .
.. ,_
Wh en the (][) key is pushed. PB7 of the PC-1500 IF rcgis 1er ( ll FOO BH) wi ll be
se t.
NO TE: So long as PB 7 of the address #F O OBH is set, "O EH" will be siored in the
accumulator.
PB? of the address # FOOBH will be resel wh en "ANI ~ FO OB H . FDH" is execu te d.
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