HP Forum Archive 19

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Re: HP-41CY emulation for NoV-64. Message #1 Posted by Antoine M. Couëtte on 27 June 2010, 1:03 a.m. I wish to offer just one comment about the following remark recently made in this third post down by Jean-François Garnier : " I think the RAMBox just drives the ISA line in a weak way, so an external ROM can overdrive it. " . My comment is as follows : YES ! things seem to happen exactly like this in a RAMBOX I (32K) or RAMBOX II (64K). During my visit to him in Bergisch Gladbach Germany some 15 years ago Dr Wilfried Koëtz President of W&W Software GmbH explained it to me exactly as follows : " A plugged in ROM will SPEAK LOUDER to the machine than a RAMBOX page " . I can think of no better way to fully confirm this assumption of yours, Jean-François. Antoine Antoine M. "Kermit" Couëtte Edited: 27 June 2010, 1:04 a.m.

Re: HP-41CY emulation for NoV-64. Message #2 Posted by Diego Diaz on 27 June 2010, 10:50 a.m., in response to message #1 by Antoine M. Couëtte Thanks for the confirmation Antoine, The NoV-64 emulation of the CY indeed uses the principle suggested by J-F Garnier (and now confirmed by yourself), to allow physical modules to be plugged and "mask" the corresponding RAM pages. One note to those that want to give this CY emulation a try: it does not work on Half-Nuts. Though it has nothing to do with the "weak ISA"... I'll try to get a new version in short which can also run in Half-Nuts. Best from the Canaries. Diego.

Re: HP-41CY emulation for NoV-64. Message #3 Posted by Winfried Maschke on 27 June 2010, 12:06 p.m., in response to message #2 by Diego Diaz Quote: ... CY emulation a try: it does not work on Half-Nuts ... Really? - It should be the other way around because the CY could only be a Half-Nut as there was not enough room inside the Full-Nut.

Re: HP-41CY emulation for NoV-64. Message #4 Posted by Diego Diaz on 27 June 2010, 2:25 p.m., in response to message #3 by Winfried Maschke I know, but that's how it is. However the trouble has nothing to do with the CY (RAMBOX) code itself but with the way it is implemented into a NoV-64 module. Cheers. Diego.

Re: HP-41CY emulation for NoV-64. Message #5 Posted by gene wright on 29 June 2010, 4:34 p.m., in response to message #3 by Winfried Maschke And, Winfried, thanks for your bar code 82143 printing program all those years ago. That was you, wasn't it? :-)

Re: HP-41CY emulation for NoV-64. Message #6 Posted by Winfried Maschke on 30 June 2010, 6:27 a.m., in response to message #5 by gene wright Quote: ... bar code 82143 printing program ... That was you, wasn't it? Yes, 30 years ago I "invented" the conversion of the HP 82143 printer to print with half linefeed and wrote some programms for printing barcode. It was the time before the IL-printer HP 82162 came out and the only way to print barcode for a poor student. And some years later when I started using internet, I found my name at www.rskey.org/gene/calcmuseum/162bc2.htm ;)

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