a 6507 data sheet and undocumented opcode?

[wogihao]

Do either of these exist or did everyone just use the 6502 sheet and rember the limitations?

 

I have been looking everywhere for the 6507, or a orignaly undocumented opcode list (like what they relased for the 486 processors) for it that would be great.

[+batari]

Do either of these exist or did everyone just use the 6502 sheet and rember the limitations?

 

I have been looking everywhere for the 6507, or a orignaly undocumented opcode list (like what they relased for the 486 processors) for it that would be great.

Daatasheets are here:

http://www.6502.org/documents/datasheets/

 

The 6507's differences are covered under this one, among others, though this one isn't as complete as some others:

http://www.6502.org/documents/datasheets/m...pu_nov_1985.pdf

 

As for "undocumented" opcodes, they are not intentional. They are the result of product term minimization which results in unintended operations taking place in "don't care" logic states. The fact that some of them are useful is a coincidence.

[wogihao]

Do either of these exist or did everyone just use the 6502 sheet and rember the limitations?

 

I have been looking everywhere for the 6507, or a orignaly undocumented opcode list (like what they relased for the 486 processors) for it that would be great.

Daatasheets are here:

http://www.6502.org/documents/datasheets/

 

The 6507's differences are covered under this one, among others, though this one isn't as complete as some others:

http://www.6502.org/documents/datasheets/m...pu_nov_1985.pdf

 

As for "undocumented" opcodes, they are not intentional. They are the result of product term minimization which results in unintended operations taking place in "don't care" logic states. The fact that some of them are useful is a coincidence.

Thanks!