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1. How many bytes are allocated in total for the variables (va, vb, vc, vd, and ve)? 2. For each of the instructions highlighted (boldface),
1. How many bytes are allocated in total for the variables (va, vb, vc, vd, and ve)? 2. For each of the instructions highlighted (boldface), derive the effective address of the memory variable (source) if any memory variable is involved, and the contents of the register a or d (whichever one involved) right after the instruction is executed. Answer in hexadecimal. Assume that all bytes in the variables va, vb and vc are initially zero. RAMStart ROMStart EQU EQU $0800 $4000 RAMStart ORG DS.B DS.B DS.W DC.B DC.W $01,$10,$AF,"1","23" $01,$10,$80E,$810,"A,"BCD ROMStart #$12 #$802 $802 va $810 #vd 0,X 3, ORG Idaa Idd ldd ldaa ldaa Idx Idaa ldaa ldaa Idaa ldab ldaa Idx ldaa Idd Idaa rts 2,+x 1,x- #2 b,x #$802 ($18,x #22 (d,x] 1. How many bytes are allocated in total for the variables (va, vb, vc, vd, and ve)? 2. For each of the instructions highlighted (boldface), derive the effective address of the memory variable (source) if any memory variable is involved, and the contents of the register a or d (whichever one involved) right after the instruction is executed. Answer in hexadecimal. Assume that all bytes in the variables va, vb and vc are initially zero. RAMStart ROMStart EQU EQU $0800 $4000 RAMStart ORG DS.B DS.B DS.W DC.B DC.W $01,$10,$AF,"1","23" $01,$10,$80E,$810,"A,"BCD ROMStart #$12 #$802 $802 va $810 #vd 0,X 3, ORG Idaa Idd ldd ldaa ldaa Idx Idaa ldaa ldaa Idaa ldab ldaa Idx ldaa Idd Idaa rts 2,+x 1,x- #2 b,x #$802 ($18,x #22 (d,x]
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