home *** CD-ROM | disk | FTP | other *** search
/ CBM Funet Archive / cbm-funet-archive-2003.iso / cbm / documents / chipdata / 6809 / 6809-16.gif < prev    next >
Graphics Interchange Format  |  2000-02-19  |  134.9 KB  |  2528x3296
   ocr: MC6809E FIGURE 16 - INDEXED ADDRESSING POSTBYTE ZERO-OFFSETINDEXED- - Int this mode, the selected pointer REGISTER BIT ASSIGNMENTS register cantains the effective address of the dala to be used 7 5 Port-Byta 4 Angister Bi o Indexed Addressing Mode by the Examples LOD instruction. are: o,X This is the fastest indexing mode. 0 A R d d d d d EA-A+ 581 Ofisat LDA .S H R 0 0 0 0 0 A+ A R 0 D 0 A+ * CONSTANT OFFSET INDEXED - In this mode, a two's-com. P R 0 0 U 1 0 -A plement offset and the contents of one of the painter registers 1 R R 0 U 1 ) A are added to form the effective address of the operan ...