>> The main issue I feel is copyright vs patent. CMD has the copyright to the >> JD code, but has the transmission protocol been patented. >I don't think so. I searched the patent database at <URL:http://www.delphion.com> for CMD. The search returned 31 results for >at least three different companies: Custom Machinery Design, Inc., >Appleton, WI; CMD Electronics, Inc., Charlotte, NC; CMD Technology, Inc., >Irvine, CA. There was nothing about communication protocols. Thanks for that! >How could one possibly copy the code? It's for a different hardware. >Copyright doesn't cover ideas or algorithms; it only covers the way they >are presented. Copyright includes code snippets, not just the whole thing verbatum... so you'd have to re-code the detection methods etc (ie waiting for the 1541 to pull data low in between after transmission of bit6 under ATN, etc) >Too bad that the C64 or C128 version of JiffyDOS can't be distributed >freely. Someone who already has a copy of it must reverse-engineer it >(mainly detect the differences from the original KERNAL) and make the new >version. Once a JiffyDOS compatible KERNAL for the VIC-20 is finished >(no, I'm not claiming I'd do it), it could be used as a base for >developing a JiffyDOS compatible KERNAL for the plus/4. Try this link for a complete dis-assembly, including notes about the various subroutines. Its not the binary though! http://hem.passagen.se/harlekin/download.htm - Nick PLEASE TAKE NOTE: The contents of this email (including any attachments) may be privileged and confidential. Any unauthorised use of the contents is expressly prohibited. If you have received this email in error, please advise us immediately (you can contact us by telephone on +61 8 9441 2311 by reverse charge) and then permanently delete this email together with any attachments. We appreciate your co-operation. Whilst Orbital endeavours to take reasonable care to ensure that this email and any attachments are free from viruses or other defects, Orbital does not represent or warrant that such is explicitly the case (C) 2000: Orbital Engine Company (Australia) PTY LTD and its affiliates - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail firstname.lastname@example.org.
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