Re: does anyone know what the apple /// interlace upgade does?

[spec@vax2.concordia.ca (Mitchell Spector)]

In article microage97@aol.com (MicroAge97) writes...

>I picked up a couple apple/// interlace upgades at a computer junk store a
>while back and haven't figured out that it does. It comes with a patch cord
>that has a switch on one end, and the other has a plug in on the other. the kit
>also come with a chip ( i don't have it in front of me).

    Well the Apple III Plus supported an interlaced graphic mode, which
was made activate with a user flippable switch in the side of the case.
The interlace mode doubled the vertical resolution, so you could get
modes like 240x384 and 560x384 (the latter is higher than a B&W Mac!).

    I'm only guessing here, but what you have sounds like an upgrade to
add the same graphic interlace feature to the standard Apple III.

Mitchell Spector
spec@vax2.concordia.ca