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, LA, LC LC , , . PC , , LA LC .
LC , . LC REP.
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.
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- , WAIT. , ( ). , .
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/. 24 , 16 (. 6.22).
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. .
. 6.22 . : , .
: , , . /, - . , , 64 192.
. 6.23 XY .
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PS, DS, X/Y . . 6.17 .
6800 X/Y R/W.
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X:
MOVE X:PERIPHERAL,XO; X/Y .
Y:
MOVE XO,Y:PERIPHERAL; X/Y .
, DSP, .
.
. 6.25 .
(R). RD WR . $FFFE X.
4- BCR, 15 ( - 50 20 ). (15 ). BCR , 15 DSP .
. 6.26 BCR . , X:$FFC0 - X:$FFFF.
DSP56002
.
IO. IO , , IO . IO / .
, . 6.27, 24- / , 24- /, .