[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
cassette interface data format?
- Subject: cassette interface data format?
- From: Benjamin Ketcham <bketcham@drizzle.com>
- Date: Wed, 06 Oct 2004 02:08:32 -0000
- Cache-post-path: yasure!unknown@cascadia.drizzle.com
- Newsgroups: comp.sys.apple2
- Organization: Ye 'Ol Disorganized NNTPCache groupie
- Summary:
- User-agent: tin/1.6.2-20030910 ("Pabbay") (UNIX) (Linux/2.4.20-29.8.progeny.8 (i686))
- Xref: g2news1.google.com comp.sys.apple2:4836
Hello, all. Apologies if the info I'm seeking is in an FAQ somewhere:
so far, I've found little that helps.
I want to know about the data format used in the Apple cassette
interface (][+, specifically). All I "know" so far is that L is
one cycle of 2kHz, H is one cycle of 1kHz. But actual output from
the Apple seems to be fairly far off from that; and there seems to
be some amount of framing (start/stop bits? parity? CRC?), which I
have not figured out yet. I'd appreciate any more complete info.
BTW, the reason is so that I can build a data loader based on a
PIC processor (for operating the Apple without disk drives).
--Benjamin