intro to microprocessors class

E2.1, E2.2, E2.3, E2.4, E2.5, E2.6, and E2.7 (AssumeN-6) 2.13 Exercises E2.1 Find the valid and invalid labels in the following statements, and explain why the invalid labels are invalid: column 1 a. ABC b. 1p+: c. too: d. not true nega e. star f. too big dec adda #1 mul ldaa #10 count E2.2 Identify the four fields of the following instructions: b loop c. here not done 0,x$01,loop Ip_cnt wait until the least significant bit is set ;decrement the variable Ip_cnt brcir E2.3 Write a sequence of assembler directives to reserve 10 bytes starting from $1000. E2.4 Write a sequence of assembler directives to build a table of ASCII codes of lowercase let- ters a-z. The table should start from memory location $2000 E2.5 Write a sequence of assembler directives to store the message "Welcome to the robot dem onstration!" starting from the memory location at $2050 E2.6 Write an instruction sequence to add the two 24-bit numbers stored at $1010 $1012 and S1013-$1015 and save the sum at $1100 $1102. E2.7 Write an instruction sequence to subtract the 6-byte number stored at $1000 $1005 from the 6-byte number stored at $1010 $1015 and save the result at $1020- $1025. E2.1, E2.2, E2.3, E2.4, E2.5, E2.6, and E2.7 (AssumeN-6) 2.13 Exercises E2.1 Find the valid and invalid labels in the following statements, and explain why the invalid labels are invalid: column 1 a. ABC b. 1p+: c. too: d. not true nega e. star f. too big dec adda #1 mul ldaa #10 count E2.2 Identify the four fields of the following instructions: b loop c. here not done 0,x$01,loop Ip_cnt wait until the least significant bit is set ;decrement the variable Ip_cnt brcir E2.3 Write a sequence of assembler directives to reserve 10 bytes starting from $1000. E2.4 Write a sequence of assembler directives to build a table of ASCII codes of lowercase let- ters a-z. The table should start from memory location $2000 E2.5 Write a sequence of assembler directives to store the message "Welcome to the robot dem onstration!" starting from the memory location at $2050 E2.6 Write an instruction sequence to add the two 24-bit numbers stored at $1010 $1012 and S1013-$1015 and save the sum at $1100 $1102. E2.7 Write an instruction sequence to subtract the 6-byte number stored at $1000 $1005 from the 6-byte number stored at $1010 $1015 and save the result at $1020- $1025