Sharp PC-1500 Technical Reference Manual page 47

42
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2-4-7. CPU control instructions
@
SEC (SEI Carry)
Sets the: carry flag.
No change takes place in
Oag~.
• Forrnat
S EC
@ REC (REset Carry)
Resets the carry flag.
N<> c hange ta k('s p l:tcc in tl(tgs.
•F·ormat
REC
@ CDV (Clear DiVider)
• Operati(ln
1 -C
•Operation
0 -
c
Clears the internal divider. In other words. since the CPU clock is supplied th rough the
divider. it ma kes cloc k reset
by
chc
COY
instruction.
• Forn1a1
CDV
•(lperati<)n
0 -
d ivider
@ ATP (Ace To Port)
l·hc contents of the
accun1ulator
art: sent on the data bus. As the
clock
f><P
is sent out
from the CPU
:u
this moment. it may be used for chc clock of the latch JC co corn prise
an o ut put port.
No change takes place in
flags.
•Formal
ATP
•Operation
H
Clock P4> - - - ' ' - - - - - - L
II
Data bu s----~ _ _ __
_/>-- -- -
L
llf1 gh 11nptd3nce)
Cofl:<iflltS o! accu mulator ~He sen1 ou t
ti
00 - - - - - - - - - - -- - -- L
NOTE: Though data is output with high state o f 00
(Ou !put
disable) du(ing memory v1(1 ite. OD
is
low
state i1'
the c ase
o f
the A TP
instruction.
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