HP Forum Archive 08

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HP-41 Card Redera ROM Versions Message #1 Posted by Chris Catotti (Florida) on 17 June 2002, 7:42 a.m. Would everyone plug their card readers in, and check for other ROM versions besides: CARD RDR 1G S/N 2542S80536 CARD RDR 1E S/N 1947A01384

Re: HP-41 Card Redera ROM Versions Message #2 Posted by David Smith on 17 June 2002, 11:01 a.m., in response to message #1 by Chris Catotti (Florida) The first card readers were just "CARD READER" with no rev.

Re: HP-41 Card Redera ROM Versions Message #3 Posted by Ty Rogers on 17 June 2002, 10:16 p.m., in response to message #1 by Chris Catotti (Florida) CARD RDR 1G s/n 2645S80201 CARD RDR 1E s/n 2051S45841 I think i have seen some: CARD RDR 1F CARD READER

Re: HP-41 Card Redera ROM Versions Message #4 Posted by David Smith on 18 June 2002, 6:37 p.m., in response to message #1 by Chris Catotti (Florida) From my records of around 40 readers about 50% of all readers are "CARD READER". The other 50% are equally split among "1E", "1F", and "1G" versions. I have never seen or heard of a any B,C,D, or H+ versions.

Re: HP-41 Card Redera ROM Versions Message #5 Posted by Poul Kaarup (Denmark) on 19 June 2002, 10:20 a.m., in response to message #1 by Chris Catotti (Florida) Mine is rev. 1D , but only says CARD READER in CAT2 sn : 2046S45384

Re: HP-41 Card Redera ROM Versions Message #6 Posted by David Smith on 19 June 2002, 6:13 p.m., in response to message #5 by Poul Kaarup (Denmark) I am going by what CAT2 reports. Where did you find the 1D info on your unit?

Re: HP-41 Card Redera ROM Versions Message #7 Posted by Poul Kaarup (Denmark) on 20 June 2002, 12:10 p.m., in response to message #6 by David Smith If you read (I used my HEPAX-module) the last 5 words of a ROM-image, they hold the revision number, ID and the checksum. My Card reader : EFFB 004 = D EFFC 031 = 1 EFFD 012 = R EFFE 003 = C EFFF 03D = checksum that is : CR 1D

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