Re: Apple IIc to Apple IIe upgrade

[lgarde@scorch.apana.org.au (Leon Garde)]

sknkwrks@sonny-boy.cs.unlv.edu (Scott Alfter) writes:

|In article <83S=LV-@engin.umich.edu> gadget@engin.umich.edu (Timothy David Sharpe) writes:
|>A friend of mine has several games for the IIe which he would like to 
|>be able to play.  However, he doesn't want to part with his IIc.  Does
|>anyone have the upgrade who would be willin to donate/sell it?

|No upgrade is needed; the IIc should be able to run all the same
|software as the IIe.

|  _/_   Scott Alfter                             Internet: sknkwrks@cs.unlv.edu

Um, well scott, I've had games that wont work on my //c.
DROLL is the first one i found that didn't , and Captain Goodnite did
too. I suspect either reliance on ROM for this. Or exploitation
of some incompatible feature of the controller card in ][e's.
any 'in the know' answer on this ?

 I suspect the disk controller and/or
any associated rom, cause the games used to hang just after boot.
I suspect dirty 6502 code.

How would one write something to run on the //e, and not the //c,
without being obvious about it ?


leon