Sharp CE-150 - Page 282

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A ll and more about Sharp PC-1500 at http://www.PC-1500.info
2-4-7. CPU control instructions
@ SEC (SEI Carry)
Sets t he: carr y flag.
No change ta kes pl ace in Oag ~ .
• Forrnat
SEC
@ REC (REset Carry )
R ese ts the carry fla g.
N< > ch an ge ta k('s pl:tcc in tl (tgs.
•F ·ormat
REC
@ CDV (Clear DiVider)
• Operati(ln
1 -C
•Operation
0 - c
Clears t he internal div id e r. In other words. s in ce the CPU clo ck is supplied th rough the
div id er . it makes clock re set by chc COY in structio n.
• Forn1a1
CDV
•(lp erati<)n
0 - divider
@ ATP (Ace To Port)
l·h c contents of the accun1ulat or ar t: sent on the data bu s. As the clo ck f ><P is se nt ou t
from the CPU :u this moment. it may be use d fo r ch c clock of the latch JC co corn pr is e
an output por t.
No change takes p la ce in flag s.
•F ormal
ATP
•Op eration
H
Clock P 4> ---' '------ L
II
Dat a b u s- ---~ ___ _ _/>- -- -- L llf1 gh 11nptd 3nce)
Cofl:<iflltS o! acc umul ato r ~ He sen1 out
ti
00 - ---------- - - -- L
NOTE: Though data is ou tput wit h high state of 00 (Ou !p ut disable) du(ing memory v1 (1 it e. OD
is l ow st ate i1' the c as e o f the A TP instru ct ion.
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