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[jdrose]

Hello,

I created a crossword puzzle of 6507 opcodes. Figured it would be a fun way for beginners to get themselves aquainted with the instruction set of the 6507 microprocessor.

Hint: I used the UMC datasheet for my reference but the MOS and Rockwell datasheets use the exact same opcodes and instruction definitions.

Also note that I left out from the puzzle the CLI, RTI, SEI* opcodes because I am not sure they have a practical application in the VCS 2600 environment. But mostly because it made everything fit together in the puzzle a little easier.

I'll post the solution in my content next week.

Enjoy.


* It is a good idea to execute a SEI at the beginning of your 6507 code just to be sure.

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[eshu]

SEI and CLI gives you an extra bit of storage - things are that tight on the 2600 that it's actually handy!