Re: DISK ][

[mwillegal <mike@willegal.net>]

Hi Roger,

I'm working on a DOS 3.3 compatible implementation that interfaces
from a DISK ][ to PC.  Current state of the design can read and write
any sector on a DOS 3.3 disk as well as format a disk(though formating
isn't very reliable, just yet).  My PC interface needs a lot of work,
but I consider that the less challenging part of this project.

http://www.willegal.net/appleii/appleii-disk-int.htm

An amazingly complete description of the Disk II technology is in the
book. "Understanding the Apple II".

http://a2central.com/?p=1157

You could probably implement an interface with the information in this
book, alone.  I did refer to Apples RWTS firmware and actual hardware
a few times, but it mostly just confirmed what was described in the
book.

Also there is a commented disassembly of the RWTS driver (minus format
function) floating around the web.  I plan to put up my commented
disassembly of the format function when I get around to getting the OK
from the person that I borrowed the original #defines from.

Regards,
Mike WIllegal


On Mar 6, 3:12 pm, Roger Schmidt <ro...@ammeberg.com> wrote:
> Has anyone ever made like a DISK ][ to another interface. I have read
> some of the documentation on the net and cant see why it isnt
> possible?!? Or am I just kidding myself?
>
> Where can i get a schematic of the DISK][ interface card?
>
> Does anyone have a bin or decompile of the PROM on the interfacecard?
>
> Roger