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Re: vintage disk drive dilema - to modify or not to modify



Mike Willegal wrote:
Hi Folks,

I figured I throw this dilema out there as something that all users of vintage articles have to deal with from time to time. I strongly believe that this old stuff should be used from time to time, but there are usually compromises involved in such usage.

I am currently using my original Disk II drive which I purchased in 1978. Right now I am using it as drive 1 on my primary Apple II and it works fine, except that it does not do well reading Atarisoft game disks. Unfortunately I find that those old time games are kind of fun, and I would like to play those games from time to time. Unfortunately they need to booted off of disk 1 and my old drive has a "drive 1" label on it.

I suspect that I could improve this drives performace by increasing the resitance in the peak detection delay circuit to the standard that was used in later disk drives. Most likely adding a 3k reistor in series with R21 would do the job. This could easily be done by lifting one leg of the existing resistor and jumpering in the new one between the existing resitor lead and the solder pad. If I did it this way, the work would be easily reversable without visible signs of hacking.

A second option would be to put a more recent vintage drive as drive 1 and move the old original drive to a second controller in slot 7, set up as an original DOS 3.1 system. Unfortunately my desk space is extremely tight and this would greatly hinder other activities. I also don't think I would use the DOS 3.1 system that much. This picture shows how tight space is.
http://www.willegal.net/appleii/appleii-bringup.htm

The third option is move the drive to the disk 2 location, even though it is labeled disk1.

The last option is to forget playing those atarisoft games, as everything else works fine.



    What do you people think?

    Regards,
    Mike Willegal

I say if the mod makes it usable, then do it. Otherwise, buy a newer drive and swap the guts. I admit to doing this on a non-working drive that had a cosmetically nice enclosure (and the correct drive number label), not because I didn't want to ruin its vintageness (is that a word?) but because I was lazy. Who's gonna know? I have a 36 year old BMW that I treat the same way. I'm not looking to win a concourse event, just drive and enjoy it as it was intended. My .02 (or '02).

Dave...