HP Forum Archive 18

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Tape Drive copy to PC with 71B IL/RS232. Message #1 Posted by Raymund Heuvel on 13 Jan 2009, 6:09 p.m. As result of some HP71B + IL / IL-RSR232 an IL-tape drive (82161A) experiment, I developed following solution to copy a tape to RS232 without too much interference of my HP71B. The 71B is not involved in the copy process! The IL protocol is moving the data.. 5 CALL COPYTAPE @ SUB COPYTAPE 10 CALL RESET 30 T=DEVADDR("TAPE") 40 R=DEVADDR("RS232") 60 SEND LISTEN T MTA DDL 4 DATA 0,0 DDL 3 DATA 0 MLA 65 SEND UNL UNT LISTEN R TALK T DDT 2 DDT 0 RDY 96 70 END SUB 100 SUB RESET 110 RESET HPIL @ RESTORE IO 120 SEND LISTEN 130 SEND IFC SDC IFC SDC 140 END SUB Line 60: DDL4 0,0 positions the tape on Track 0 and Record 0 DDL 3 0 positions the byte pointer at 0 (thus 0,0,0). Line 65: DDT 2 reads the current record in buffer 0 of the tapedrive. subsequent DDT 0 prepares for sending the data from buffer 0 and RDY 96 (is a HP-IL Send Data Command) Assumptions: Power-up IL/RS232 and Tape Drive to start with default state. Your PC-RS232 should be configured with 9600,n,8,1 Xon/Xof. Sources: HP 82161A Cassette Drive Manual, overview DDL/DDT commands HP 82401A HP-IL Interface Owner's Guide (for the HP 71) HP 82166A HP-IL Interface Specification: Chapter C.2 for the required SDA command (SDA is not in HP-71B/IL available => Thus a RDY 96 ...) Known Issues: HP-IL communication is not possible during transfer (takes about 10 minutes + a two rewinds) The copy process can be stopped by pressing the RESET on the IL/RS232 or .... the main switch in the basement. Your tape drive battery pack should be in top condition, a charger is strongly recommended The 'receiving' program should tolerate a timeout of about 7-10 seconds due to a rewind of the tape in the middle of the transfer (track 0 / track 1). Of course this could be the n-th reinvention of this. Then so be it ... :) Improvements are welcome! Best regards Raymund.

Re: Tape Drive copy to PC with 71B IL/RS232. Message #2 Posted by Egan Ford on 13 Jan 2009, 9:23 p.m., in response to message #1 by Raymund Heuvel Awesome Raymund. I am a huge fan of HP-IL. What could possibly be nerdier than talking with dinosaurs, oops, I mean, networking with vintage calculators? :-) You may want to post this as an article. Thanks.

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