dillon@POSTGRES.BERKELEY.EDU (Matt Dillon) (11/08/89)
I'm going away for a week but have almost completed modifications to DNet for use over a 7 bit line or with other protocols. This will become the default (with a switch for 8 bit mode). That way you guarentee that DNet will run on any connection or configuration by default. The modifications are as follows: SYNC character changed to 0x5B (from 0xFF) All packet header and control information redesigned such that all bytes fall within the range 0x20-0x7F Several new packet types added (invisible to user) Currently there is a PCMD_WRITE packet ... a data packet containing N bytes of 8 bit data. I'm adding another packet type which will encode binary data into 6 bit bundles (or'd with 0x40 to make them ascii) for 7 bit mode... resulting in an increase of 25% in the packet size. DNet will use whichever packet makes sense depending on the mode selected and the contents of the packet. If anybody wishes to submit a simple block compression algorithm that works well with small blocks of data (history storage is alloweds), please email me... I have room for a couple new packets and am seriously thinking about adding compression to the 8 bit mode. The compression would not effect the already slow keyboard response as it would be run only on packets larger than, say, 32 bytes. P.S. THIS MUST BE A FAST COMPRESSION ALGORITHM. It also must use a statically sized history. -Matt
beh@caen.engin.umich.edu (Bob Hruska) (11/09/89)
From article <8911080305.AA03498@postgres.Berkeley.EDU>, by dillon@POSTGRES.BERKELEY.EDU (Matt Dillon): > > I'm going away for a week but have almost completed > modifications to DNet for use over a 7 bit line or with other > protocols. This will become the default (with a switch for 8 > bit mode). That way you guarentee that DNet will run on any > connection or configuration by default. This is the greatest news I've heard in a long time! Please let me know when and where I can get this, Matt. I've been dying to use DNET but suffer from the 7-bit blues. -- Bob Hruska University of Michigan Computer Aided Engineering Network (CAEN) INTERNET: beh@caen.engin.umich.edu UUCP: {umix|ucbvax|uunet}!caen.engin.umich.edu!beh