ZiLOG Z80 User Manual page 290

< %27
7UGT U /CPWCN

1RGTCVKQP
1R %QFG
&GUETKRVKQP 7KH FRQWHQWV RI UHJLVWHU & DUH SODFHG RQ WKH ERWWRP KDOI $ WKURXJK $ RI
%QPFKVKQP $KVU #HHGEVGF
'ZCORNG
80
+/ ‘ &  % ‘ %  +/ ‘ +/  
,1,
1 1 1 0
1 0 1 0
WKH DGGUHVV EXV WR VHOHFW WKH ,2 GHYLFH DW RQH RI  SRVVLEOH SRUWV
5HJLVWHU % PD\ EH XVHG DV D E\WH FRXQWHU DQG LWV FRQWHQWV DUH SODFHG RQ WKH
WRS KDOI $ WKURXJK $ RI WKH DGGUHVV EXV DW WKLV WLPH 7KHQ RQH E\WH
IURP WKH VHOHFWHG SRUW LV SODFHG RQ WKH GDWD EXV DQG ZULWWHQ WR WKH &38 7KH
FRQWHQWV RI WKH +/ UHJLVWHU SDLU DUH WKHQ SODFHG RQ WKH DGGUHVV EXV DQG WKH
LQSXW E\WH LV ZULWWHQ WR WKH FRUUHVSRQGLQJ ORFDWLRQ RI PHPRU\ )LQDOO\ WKH
E\WH FRXQWHU LV GHFUHPHQWHG DQG UHJLVWHU SDLU +/ LV LQFUHPHQWHG
0 &\FOHV
4
6 LV XQNQRZQ
= LV VHW LI %±  UHVHW RWKHUZLVH
+ LV XQNQRZQ
39 LV XQNQRZQ
1 LV VHW
& LV QRW DIIHFWHG
,I WKH FRQWHQWV RI UHJLVWHU & DUH
FRQWHQWV RI WKH +/ UHJLVWHU SDLU DUH
SHULSKHUDO GHYLFH PDSSHG WR , 2 SRUW DGGUHVV
PHPRU\ ORFDWLRQ
1000H
 DQG UHJLVWHU % FRQWDLQV
1001H
,1,
ED
1 1 0 1
A2
0 0 1 0
7 6WDWHV
16 (4, 5, 3, 4)
 WKH FRQWHQWV RI UHJLVWHU % DUH
07H
1000H
FRQWDLQV  WKH +/ UHJLVWHU SDLU FRQWDLQV
7BH

0FH
 0+] (7
4.00
 DQG E\WH LV DYDLODEOH DW WKH
7BH
 $W H[HFXWLRQ RI
07H
= ,QVWUXFWLRQ 6HW
 WKH
10H
INI