Re: ... What IIe motherboard needed for double-hires?

[russotto@wanda.vf.pond.com (Matthew T. Russotto)]

In article <38050A6D.3AECD4B2@swbell.net>,
Rubywand  <rubywand@swbell.net> wrote:
}Jon Bettenct writes ...
}> 
}> I was on Rubywand's web site, under the "How can I tell what version my
}> computer is?" section, and I saw the information about serial numbers and
}> Double Hi-Res Graphics. I was wondering, is an Apple //e with serial
}> number 607-0187-A able to display these graphics? 607-0187-A is the serial
}> number on my Apple //e.
}> 
} ....
}
}     Thanks for bringing this up. Probably, the IIe part of the "How can I tell
}what version my computer is?" could stand a bit of clarification.
}
}     As Matthew observed, there is wide agreement that a Revision B motherboard
}(or whatever came later) is required. However, there is some question about
}what serial/part numbers go with which Revision-- an "A" in the number you find
}on a board does not always seem to mean that the board is Revision A. (I don't
}know what revision corresponds to 607-0187-A.)

According to the Extended 80 Column Text Card Supplement, the motherboard is
revision B if and only if the part number of the _board_ ends in B.
This probably isn't the same as the system serial number.

}     According to Don Worth (in SoftTalk, July 1983), besides a Rev B
}motherboard, you also need to have an Extended 80-col Card installed and to
}have a jumper on the pins at J1 in order to get double-hires.

Yep.

This connects AN3 and FRCTXT' on the aux slot.  I imagine FRCTXT'
(force text, active low) isn't available on the aux slot on Rev A
motherboards.
-- 
Matthew T. Russotto                                russotto@pond.com
"Extremism in defense of liberty is no vice, and moderation in pursuit
of justice is no virtue."