HP Forum Archive 11

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hp-71b installing/removing memory Message #1 Posted by Terry Ingram on 29 Mar 2003, 2:55 p.m. Hello all, Can someone provide instructions (if any) for preparing the hp-71b to accept 4k or 32k ram memory modules. I recently inserted a 4k memory module which resulted in a memory reset. I have removed the 4k memory module, and now the 71b seems to be locked. I am unable to turn off the machine. I am assuming the memory modules were originally supplied with paper instructions for proper use, which I do not have. Thanks, Terry Ingram

Re: hp-71b installing/removing memory Message #2 Posted by Raymond Del Tondo (Germany) on 29 Mar 2003, 3:37 p.m., in response to message #1 by Terry Ingram Hello, maybe you could try the INIT key combinations (see HP-71B manual), or simply remove the batteries for an hour or so. My experience is that the 71B configures additional RAM w/o any problems, initially as part of main RAM. If the RAM is freed (as PORT memory) it should even work to remove it w/o 'Memory Lost'. Only if the RAM module is configured as part of main memory a removal will result in a memory loss. Raymond

Re: hp-71b installing/removing memory - resulting with hp-il problems Message #3 Posted by Terry Ingram on 29 Mar 2003, 8:31 p.m., in response to message #2 by Raymond Del Tondo (Germany) After removing the batteries, I shorted the battery contacts and the 71b powered up fine. As your suggestion, I issued FREE PORT(1), before pulling the memory module, and everything worked okay. No memory reset. Upon re-inserting the memory module, the 71b automatically configured the memory as main ram. Another problem I've noticed during this episode, is now the hp-il module doesn't work. The hp-il module doesn't respond to "CONTROL OFF" or "RESET HPIL" commands. Any suggestions for the hp-il problem? Are there any way to physically reset the hp-il module? Thanks for the help, Terry Ingram

Re: hp-71b installing/removing memory - resulting with hp-il problems Message #4 Posted by Raymond Del Tondo (Germany) on 30 Mar 2003, 8:05 a.m., in response to message #3 by Terry Ingram Hello, I'm not a hardware expert, but does your HP-IL module work with other commands, like COPY to/from tape, and does the module show up in the VER$ list? Maybe pulling it off the machine then reinserting could help, of course while the HP-71 is off:-) Another idea: Is the loop closed? Raymond

Re: hp-71b installing/removing memory - resulting with hp-il problems Message #5 Posted by Terry Ingram on 30 Mar 2003, 11:04 a.m., in response to message #4 by Raymond Del Tondo (Germany) No, the hp-il doesn't work with any commands at all. Not even the "reset hpil". I've pulled and re-inserted the module, but the operation is still the same. I've tried the closed loop test as described on page 211 of the hp-il owner's manual, and do not receive either the screen cursor indicated a good module, or the "self test failed" message indicating service is required. The 71b just remains in a frozen state until I press the ON key several times. The hp-il module is recognized with the VER$ command, "HPIL:1A". Unless there is a physical way to reset (short contacts?), I think it may be time for a new hp-il module. Thanks for your help, Terry Ingram

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