Re: Disk ][ cards

[Wayne Stewart <waynes@intergate.bc.ca>]

Yes, they are all the same as far as I know except for the proms.
I was wondering about them from a historical or collectors
perspective. What Disk II card was hooked up to the first Disk II?

Unless I'm repairing one for someone, I rarely use a Disk II.
Whenever possible I try to run the II+ off its hard drive or 3.5".
Wish I'd ordered enough superdrive cards to leave one in the II+
If I need a 5.25 I use a platinum 5.25. I hate throwing out Dis IIs
and the stack in the closet  keeps getting higher. Someday you'll
see the headlines "Man burried under Disk II slide"

I did see someone using 13 sector proms once about 4 years ago.
He was using a II+ to run one copy protected program that he
needed for his bussiness. I wouldn't be surprised if he was the
only one in BC, maybe all of Canada.

       Wayne

Mitchell Spector wrote:

>
>     The bottom line is all Apple II 5.25 controllers, at least
> those manufactured by Apple Computer, are functionally identical.
> The main difference is early cards had a dual set of IDC-20 male
> pins directly on the card, while newer ones replaced that with
> a D-19 female connector that attached to the back port. Using an
> adapter, you can connect newer drives to older cards (or visa-
> versa of course).
>
>     One important difference has do with the PROMs on early
> Disk II controller cards, which only supports 13 sector disks
> (DOS 3.3 and ProDOS-8 require the 16 sectors PROMs). In all
> my years an Apple II user, I've never seen a controller with
> the original PROMs. They're quite rare as far as I know.
>
> Mitchell Spector
> spec@vax2.concordia.ca