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- Newsgroups: comp.sys.cbm
- Path: sparky!uunet!wupost!darwin.sura.net!jhunix.hcf.jhu.edu!golds_ss
- From: golds_ss@jhunix.hcf.jhu.edu (Stuart S Goldstone)
- Subject: Re: 16 bit CRC source?
- Message-ID: <1992Sep12.234219.22101@jhunix.hcf.jhu.edu>
- Organization: HAC - Johns Hopkins University, Baltimore
- References: <1992Sep9.094328.16978@ccu.umanitoba.ca> <9209101596@zone4.ocunix.on.ca> <wzwnzyr.fuzzy@netcom.com>
- Date: Sat, 12 Sep 1992 23:42:19 GMT
- Lines: 30
-
- In article <wzwnzyr.fuzzy@netcom.com> fuzzy@netcom.com (Fuzzy Fox) writes:
- >
- >One of the problems with writing a Zmodem module for the 64 is that it
- >is a streaming protocol, meaning that the bytes never stop coming over
- >the modem. Since disk access usually interferes with modem activity,
- >Zmodem would tend to really screw up on the C64. I think a good
- >solution to this would be to code a custom DOS transfer method which
- >is asynchronous, allowing full interrupting of the protocol. I've seen
- >this done in some programs, so it is certainly possible. Also, it would
- >probably still be much faster than the stock DOS routines, which would
- >be the next bottleneck.
- >
- >Of course, a lot of this can be avoided by simply putting Zmodem into
- >stop-and-wait mode, which makes it almost no better than Ymodem.
- >However, Zmodem's other features (such as XON/XOFF transparency, no file
- >padding, and crash recovery) could still be used.
-
- Well, just remember that some programs (like DesTerm, which I use)
- allow downloading directly to a RAMdisk, which is of course a lot faster
- than a regular 15xx. Right now I always download to my RAMdisk and then
- copy the files to floppy disks when I log off. If disk speed is the
- problem, using a RAMdisk could be one solution. Personally, I'd like to see
- someone try to do it, if it wouldn't be THAT much trouble. If I could I
- would, but I hate to see people giving up because they don't =think= it can
- be done. Where would we be if everyone thought that way?
- --
- Stuart S. Goldstone | "Christianity is like a shoe;
- Internet: golds_ss@jhunix.hcf.jhu.edu | if you don't fit into it,
- BITNET: golds_ss@jhuvms | we cut your toes off!"
- GEnie: S.GOLDSTONE1 |
-