MC81F4104 Datasheet, PDF (49/118 Pages) Finechips – ABOV SEMICONDUCTOR

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;When G = 0, X = 0F5h
LDA 45h + X ;op code is 0C6h
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MC81F4104
Y indexed direct page (8 bit offset) → dp+Y
This address value is the second byte (Operand) of command plus the data of Y-register, which
assigns Memory in Direct page.
This is same with above „X indexed direct page‟. Use Y register instead of X.
Y indexed absolute → !abs+Y
Accessing the value of 16-bit absolute address plus Y-register value. This addressing mode can
specify memory in whole area.
Example :
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LDA !0FA00H+Y
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;when Y = 55h
;op code is D5h
Indirect Addressing
Direct page indirect → [dp]
Assigns data address to use for accomplishing command which sets memory data (or pair memory) by
Operand.
Also index can be used with Index register X,Y.
October 19, 2009 Ver.1.35
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