Re: Hi-speed serial interfacing from A2

[scott@alfter.DIESPAMMERSDIE.us (Scott Alfter)]

In article <58OdnUYYxaV5T9zRnZ2dnUVZ_tCdnZ2d@giganews.com>,
Steven Hirsch  <snhirsch@gmail.com> wrote:
>I just _know_ there was discussion of this subject within the last year or
>so, but )&(^ Google doesn't turn up anything.  I'm interested in writing a
>filesystem driver to support an A2 as client on a DriveWire server.  This
>is a simple protocol developed for the Tandy CoCo, but it's generic enough
>to be adapted for almost any small box.
>
>The CoCo can bit-bang serial communications at 115k baud, so I'm hopeful
>that something like this is possible for some flavor of Apple 2.  There was
>some talk of folks achieving hi-speed serial I/O on bus cards (Super Serial
>card?), but cannot find the thread.

I'm not sure what kind of speed I'm getting from it (haven't run the
numbers), but I have software and a simple adapter that plugs into the
16-pin joystick port that connects an Apple II to 1-Wire devices.  Take a
look at the first two projects here:

http://alfter.us/computers/apple2/software.aspx

"1-Wire Apple II Primitives" is the original version, written in a mix of
assembly language and BASIC.  Device discovery is fairly slow (a few seconds
per device) as I wrote that part in BASIC, but reading/writing bits and
bytes is reasonably fast.

"Apple II Beer Fridge Controller" contains the same routines, rewritten in C
(with some inline assembly language) and built for the Apple II with cc65.

Maybe there's something in there that might be useful for your purposes.

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