Re: cassette interface data format?

[Benjamin Ketcham <bketcham@drizzle.com>]

Paul R. Santa-Maria <paulrsm@buckeye-express.com> wrote:
> 
> The original Apple II system monitor listing is at
> http://linux.cis.monroeccc.edu/~paulrsm/6502/

Ah, thank you very much for this info.  Should be helpful...

An update on the project so far:
Using the info below from Michael J. Mahon, everything seems correct
except at the end, the post-data framing.  I get an "ERR" -- but
all the data is transferred correctly.  It's as if my checksum
is wrong, or as if some other signals or codes are expected in
addition.  I tried sending another "start" code, or going back
to the "lead in tone", but makes no visible difference, still
get "ERR".
Hopefully I can reverse-engineer what is expected by looking
at the ROM listing (I have a ][+, but AIUI the cassette data
format is unchanged since the Apple I).
I appreciate everyone's help.

--Benjamin

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