This is a ZIP of the Walnut Creek CP/M CDROM's code on "packet radio". It has the following:

* Z80 sources for MULRPT AX.25 Xerox 820 repeater and a TNC (no author)
* Z80 sources for "packet" use of Heath H89 and a TNC by "RAY, N6UE"
* BASIC code for TRS80 Model 100 MINI-PBBS and a TNC by "Dick Roux N1AED"
* "general purpose packet radio server node", with a Xerox 820 & CP/M,
     and one or TWO TNC's. "MailBox and GateWay   Version 12.0 - 5/11/87"   

* There are also three sets of PROM HEX code by WA8DED ver 1.2 for "TAPR TNC-1 (or equivalent, such  as the AEA PKT-1 or Heath HD-4040)", a 6809 based device; or the PK87;   or the TAPR  TNC-2  (or equivalent, such as the MFJ-1270 or AEA  PK-80), a Z80 based device.  NO SOURCE CODE, but
these were simply the TNC's in use by the above code.