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Portable Plus - Additional RAM
03-16-2015, 04:27 PM
Post: #3
RE: Portable Plus - Additional RAM
(03-16-2015 01:18 AM)Dave Frederickson Wrote:  ...
Martin was looking into memory upgrades last Fall. Maybe he can provide an update.


Well, I read the accompanying article in the Portable Paper and understand basically how it can be done on the Portable. But this would require quite some soldering work.
For the Portable Plus there were 3rd party RAM extensions e.g. sold via H. Goldstein's company. I think they went to up to 4.5 MB which (today) is still a small amount for a RAM disc. One could probably design a new large capacity drawer with today's technology, and talk to it via an MS-DOS block device driver. However this is a relatively large and very specific project.

For now, it might be more useful and more universal to follow the "HP-IL to PC" or "HP-IL to SD card via Filbert" way to add a larger working disc to avoid the 9114 disc drive. This could probably be similar in speed to a RAM disc.

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RE: Portable Plus - Additional RAM - Martin Hepperle - 03-16-2015 04:27 PM

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