The Museum of HP Calculators

HP Forum Archive 16

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OT SHARP PC-1500A
Message #1 Posted by Trent Moseley on 26 June 2006, 11:16 p.m.

In reading all the posts about various SHARP model calcs, I found the two that I had and haven't used or even looked at in fifteen years or so. They were in their original padded slip covers with batteries removed. Put batts in powered up and all keyboard functions work just fine. Typed in MEM and I got 0!! No Memory! Did the memory chip(s) just die?

tm

      
Re: OT SHARP PC-1500A
Message #2 Posted by Klaus on 27 June 2006, 3:20 a.m.,
in response to message #1 by Trent Moseley

I think you have to type in 'NEW 0' to initialize the memory. 'STATUS 0' and 'STATUS 1' return some information about the memory (I think 0=free memory and 1=occupied memory).

The manuals for the PC-1500(A) are available on the net.

      
Re: OT SHARP PC-1500A
Message #3 Posted by Valentin Albillo on 27 June 2006, 4:24 a.m.,
in response to message #1 by Trent Moseley

You must probably initialize/reset it.

Just in case you don't have the manual, which clearly describes what you should do to reset the machine, you can download it in PDF format from here.

Best regards from V.

            
Re: OT SHARP PC-1500A
Message #4 Posted by GE on 27 June 2006, 5:29 a.m.,
in response to message #3 by Valentin Albillo

MEM is not a keyword on the 1500, multi-character variable names are allowed, and BASIC doesn't require declaration of variables before use, so what you are actually asking is the value of the newly created variable names 'MEM'.
This value is zero at variable creation.
Probably no initialization is needed, your machine works perfectly.

                  
Re: OT SHARP PC-1500A
Message #5 Posted by Thomas Radtke on 27 June 2006, 5:53 a.m.,
in response to message #4 by GE

MEM ist just a shortcut to STATUS 0 (0=zero). I think the others are right, very often (always) the PC-1500(A) is in an undefined state after loading new batteries so NEW 0 or even pushing reset at the back is required.

I fell for it right after I got my 1500 (beautiful machine), thought I got a defect machine!

                  
Re: OT SHARP PC-1500A
Message #6 Posted by Valentin Albillo on 27 June 2006, 6:42 a.m.,
in response to message #4 by GE

Hi, GE:

    MEM *is* a keyword in the SHARP PC-1500/1500A, as well as the TRS-80 PC-2, which happens to be the very same machine under different brand name and cosmetics.

    If in doubt, have a look at the manual, I gave the link in my previous post.

Best regards from V.
                        
Re: OT SHARP PC-1500A
Message #7 Posted by GE on 27 June 2006, 8:45 a.m.,
in response to message #6 by Valentin Albillo

Thanks all, I stand corrected.
I felt that the probability of having exactly zero byte left was too small.
Actually I should have known you guys couldn't be that wrong...

                              
Re: OT SHARP PC-1500A
Message #8 Posted by Trent Moseley on 27 June 2006, 3:44 p.m.,
in response to message #7 by GE

Thanks everyone! NEW 0 was the key. Memory is OK.

tm


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