Re: A2 Gameport and/or Internal Game Connector

[David Wilson <david@uow.edu.au>]

zeroone@nospam.nonet (zeroone) writes:

>In article <pmqn109a7f4es5m01h3gf8jpula4ogmkti@4ax.com>, Jeff Blakeney
><CUTjblakeney@sympatico.ca> wrote:
>> You mention the IIgs having four switch inputs but the pinout you
>> posted doesn't list Switch 3.  Looking in my IIgs hardware reference I
>> see that you have two pins listed wrong above.  Pin 5 is a +5 volts
>> pull-up and pin 9 is switch 3.

>Just out of curiosity, which pinout list is actually correct? The one Joe
>listed (which is what the Apple IIGS Owner's Guide has listed on page 164)
>or your IIgs hardware reference manual (I'm assuming your reference manual
>is the one which Apple published as well)?

The one with strobe on pin 5 and no connect on pin 9 is not correct for the
IIgs - it is the older pinout used on the II, II+ and IIe.

The IIgs circuit diagram (page 6 of 8 in the case of the original motherboard)
in the IIgs Hardware Reference agrees with the documentation in the Hardware
Reference on page 156 where it says:

	Note that the SW3 input is new to the Apple IIgs.

That note should have also pointed out that STROBE' was replaced with a +5v
pullup (pin 5).
-- 
David Wilson  School of IT & CS, Uni of Wollongong, Australia