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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.
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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.
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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.
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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.
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And, Winfried, thanks for your bar code 82143 printing program all those years ago.
That was you, wasn't it?
:-)
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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 ;)