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[erkanz55]

Write a program segment (at most two instructions) to clear the carry bit if Accumulator A contains an odd number, otherwise set the carry bit. The contents of AccA may be modified.

 

[Pommie]

Is there an instruction something like rotate right through carry. If so then xor 1 (or subtract 1) followed by the rotate will be the two instructions.

Mike.
Edit, a look at the instruction set should give you the code you need.

 

[Nigel Goodwin]

Obviously a homework question, so moved to homework - moderator.

 

[erkanz55]

Is there an instruction something like rotate right through carry. If so then xor 1 (or subtract 1) followed by the rotate will be the two instructions.

Mike.
Edit, a look at the instruction set should give you the code you need.

thanks for help
I looked at the instruction set many times but still can't write the code.

 

[Pommie]

Have a look at instructions EORA (imm) and RORA.

Mike.

 

[erkanz55]

Have a look at instructions EORA (imm) and RORA.

Mike.

Thank you

 

[JimB]

Another tip,

do you know the easy way to tell if a binary number is odd or even?

JimB

 

[erkanz55]

Another tip,

do you know the easy way to tell if a binary number is odd or even?

JimB

Last digit number is 1 , the number is odd , otherwise even.

 

[erkanz55]

I solved the problem thank you everyone

 

[JimB]

Looks like someone has thrown his toys out of the cot.

Thread closed.

JimB