[Coco] 86-87 GIME chip detect challenge

[Nick Marentes]

Later down the track with my new CoCo3 game, I'll have a need to be able to
detect which of the 2 versions of GIME chip is in the CoCo3, '86 or '87.

Here's a challenge for someone to come up with a simple, compact way to
detect for this without user intervention.

Can anyone help?

Nick