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- Path: sparky!uunet!utcsri!torn!cunews!revcan!sidus!zone4!andrew
- From: andrew@zone4.ocunix.on.ca (Andrew Low)
- Newsgroups: comp.sys.cbm
- Distribution: world
- Subject: Zmodem implementation
- References: <1992Sep12.234219.22101@jhunix.hcf.jhu.edu> <92091326427@zone4.ocunix.on.ca> <h=yn76j.fuzzy@netcom.com>
- Message-ID: <9209148324@zone4.ocunix.on.ca>
- Organization: Zone4
- Date: Mon, 14 Sep 92 23:49:08 GMT
- Lines: 47
-
- There seem to be at least three people who have noted that they would like
- to participate in something like this:
- massive@(somethingOrOther)
- fuzzy@netcom.com
- andrew@zone4.ocunix.on.ca (me)
-
- I didn't see any mention from the original poster as to continuing his
- work on the Zmodem protocol.. then again I figure simply donating the
- 'almost complete' code to us would be a great advantage.
-
- In article <h=yn76j.fuzzy@netcom.com>
- fuzzy@netcom.com (Fuzzy Fox) writes:
- >
- >I don't have any working code, but the theory is sound, and shouldn't
- >take much to implement. The real trouble is that the DOS would be
- >bypassed, forcing us to recreate a smaller DOS, but that's pretty
- >standard for most fast-save routines in cartridges.
-
- I'd argue that the 71 and 81 in 'burst' mode would be all we need
- to get the transfer speed. Wasn't there something about being able
- to use them in this mode when talking to the 64? (I'm not a drive
- fanatic). In any case, I'd love to see the code for the drive
- be fairly generic in any case, but I'm not the joe (or David :)
- writing it am I?
-
- I don't quite understand your comments about DOS being bypassed and
- having to rewrite it. Would it not be possible to 'download' the
- drive code to the 1541 (ie: start up the fastload/save routine)
- before each transfer? Here's what I mean..
-
- User is in terminal X, happy happy.. and decides to use the zmodem
- protocol. Zmodem send is started, the protocol sends the drive
- commands to set the drive memory to be bytes, X, X, X.. and then the
- drive command to start executing the code at that point. The zmodem
- protocol then starts doing its thing. Upon completion of the file
- the code in the drive terminates and the drive becomes the friendly
- '41 again.
-
- This would allow smaller and simpler drive code, and no need to write
- any DOS handling stuff. (why write DOS when we don't need to?)
-
- >How's my posting? Call 1-800-ALT-FLAME
-
- Shouldn't that be 1-900?
- +/+\+/+\+/+chew carefully/+\+/+\+/+\+/+\+/+\+/+\+/+\+/+\+/+\+/+\+/+\+/+\+/+\+/+
- Roo [andrew@zone4.ocunix.on.ca] m a c h i n e l o v e h a t e f e a r v o i d .
- "dreams are all that separate us from the machines"
-