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X-memory Data with the card reader
04-14-2015, 06:23 AM (This post was last modified: 04-14-2015 06:26 AM by Dieter.)
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RE: X-memory Data with the card reader
(04-13-2015 06:10 PM)4ster Wrote:  Has anyone developed a way of using the card reader to directly load into Extended Memory?

No way. On the one hand the card reader allows exchanging data between RAM and "mass storage", i.e. magnetic cards. On the other hand the X-Functions transfer data between RAM and X-Memory. So there is no direct link between cards and X-Memory.

You should also keep in mind that the X-Functions/X-Memory module (as well as the 41CX) appeared some time after the HP-41 and its card reader, so the latter of course did not include any functions for reading/writing data directly from/to X-Memory.

By the time X-Memory was available HP introduced HP-IL with its much more powerful tape drive as a kind of file-based "next gen" mass storage. AFAIK X-Memory files could be transferred directly to/from this device. OTOH I feel the card reader was more like an intermediate solution for using HP67/97 software. While 224 bytes per card were fine for a 67/97 (one card could hold the complete program memory or all data registers), it was quite a bit limiting for the '41. ;-)

Dieter
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X-memory Data with the card reader - 4ster - 04-13-2015, 06:10 PM
RE: X-memory Data with the card reader - Dieter - 04-14-2015 06:23 AM



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