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-
- TransNib V1.00
- ==============
-
- Devised by Matt Francis (m.p.francis@newcastle.ac.uk)
-
- The disclaimer and copyright information cover all parts of this package.
-
-
- CREDITS
- -------
-
- TransNibAm V3.11 (Amiga front-end) and TransNib64 V2.0 (C64 front-end) by
- Matt Francis.
-
-
- DISCLAIMER
- ----------
-
- This package comes with no warranty, either expressed or implied. The
- author is in no way responsible for any damage or loss that may occur due to
- direct or indirect usage of this software. Use this software entirely at
- your own risk.
-
- If you damage any of your equipment as a consequence of using a cable
- designed in correct or incorrect accordance to the instructions given
- elsewhere in this document, I most definitely CANNOT be held responsible.
- Having said that, I (the author) have been using this system without
- problems for some time now.
-
-
- COPYRIGHT
- ---------
-
- This package is freely distributable, BUT all programs and documentation are
- copyright 1993 Matt Francis. The ReqTools library is copyright to Nico
- François. Permission is NOT given to re-release this package if it has been
- altered in any way.
-
-
- DISTRIBUTION
- ------------
-
- Permission is given to include this program in a public archive (such as a
- BBS, FTP site or PD library) providing that all parts of the original
- distribution are kept intact. These are as follows:
-
- TransNib/TransNib.doc
- TransNib/TransNib.doc.info
- TransNib/TransNib.guide
- TransNib/TransNib.guide.info
- TransNib/TransNibAm/TransNibAm
- TransNib/TransNibAm/TransNibAm.info
- TransNib/TransNibAm/TransNibAm.guide
- TransNib/TransNibAm/TransNibAm.guide.info
- TransNib/TransNibAm.info
- TransNib/TransNib64/transnib64
- TransNib/TransNib64/transnib64s
- TransNib/TransNib64/TransNib64.doc
- TransNib/TransNib64/TransNib64.doc.info
- TransNib/TransNib64.info
- TransNib.info
- Libs/reqtools.library
-
- No charge may be made for this program, other than a _reasonable_ copying
- fee, and/or the price of the media.
-
-
- INTRODUCTION
- ------------
-
- TransNib is a fast, simple parallel data transfer protocol. It was designed
- to make linking any type of machine to any other type as easy as possible.
- All that is required is six 5V I/O lines at each end. It doesn't matter how
- fast or slow each machine is, as the protocol uses a two-line handshake
- procedure, ensuring the two machines cannot possibly go out of sync.
-
- TransNib was designed to be used simply to port data from one machine to
- another, so the only real requirement is a noise-free link, as there is no
- error checking. TransNib has been extensively used, without problems, over
- a three metre long cable.
-
- Any two computers supporting the TransNib V1.00 protocol can be linked. So
- far, front-ends for the TransNib V1.00 protocol exist for the Amiga and the
- Commodore 64.
-
- Anyone who is interested in writing a front end for another platform (or who
- has already written one) should contact me first (via e-mail) to discuss
- releasing the software as part of the TransNib suite. I will happily answer
- any queries about how to implement the TransNib protocol. Obviously, any
- documentation for the new program will be included, and full credit will be
- given in this document. I am especially keen on getting a TransNib program
- written for the PC, but please, contact me before releasing anything.
-
-
- THE PROTOCOL
- ------------
-
- In all, six lines are used. Four are data lines, the other two being used
- for handshaking. The handshaking lines are designated data-ready (DRDY) and
- data-received (DRCV). This method is a trade-off between efficiency and
- stability.
-
- At the lowest level, nibbles are transfered as follows. Before a transfer
- begins, the sender should pull DRDY low and the receiver should pull DRCV
- low. The transfer procedure for one nibble is as follows:
-
- - Receiver starts waiting for DRDY to go high.
- - Sender puts nibble on data lines, pulls DRDY high and waits for
- DRCV to go high.
- - Receiver gets nibble, pulls DRCV high and waits for DRDY to go
- low.
- - Sender pulls DRDY low and waits for DRCV to go low.
- - Receiver pulls DRCV low and loops.
- - Sender loops.
-
- The file transfer protocol is extremely simple and is one-way, but allows
- for batch sends. The format of data for each file sent or received is as
- follows:
-
- - A filename (a string of characters terminated by a zero). A blank
- filename (ie. just the terminating zero) signals end of transfer.
- The filename must not include a path. Note that it is the
- receiver's responsibility to filter/translate the filename as
- appropriate.
- - The file size N (four bytes in least-significant to most-
- significant order).
- - N bytes of data.
-
- Software should cater for the "no-files" situation (ie. the first byte
- received is zero).
-
-
- CABLE
- -----
-
- Please read the DISCLAIMER section if you haven't already.
-
- These details cover the Amiga<->C64 cable. Cables for other configurations
- will differ, but shouldn't be too hard to make up.
-
- You will need:
-
- - 25-pin D-type connector (female) to fit Amiga parallel port.
- - 22-pin edge connector to fit C64 user port.
- - Some cable (at least six-core, preferably more - eg. nine - in
- case extra lines are added in the future).
- - Solder, patience etc..
-
- Connect the pins as follows (the numbers correspond to the Amiga's parallel
- port. The letters correspond to the C64's user port).
-
- Amiga 2 <-> C C64
- 3 <-> D
- 4 <-> E
- 5 <-> F
- 8 <-> K
- 9 <-> L
-
- A ground pin or pins at the Amiga end (pins 18-22 for example) should be
- connected to a ground pin or pins at the C64 end (pins 1, 12, A or N for
- example).
-
- Note of caution: it is imperative that you don't get the numbers confused!
- Secondly, some C64 user-port connectors are a bit dodgy in that they can be
- plugged in upside-down if you're not careful. It is advisable that you mark
- the upper surface of the plug in some way so it doesn't get put in the wrong
- way round (I've seen the consequences of this happening - the C64 survived
- perfectly, but the Amiga at the other end got totally geeked).
-
-
- HISTORY
- -------
-
- V1.00 - First public release.
-