Lo-tech 2MB RAM card & HIMEM.SYS ... ?

[glitch]

I have a design for one, as always they problem is the hours needed to push these things over the edge into products!

ISA protoboards are still widely and cheaply available:

http://www.ebay.com/itm/140904474218

That seller has many different sizes of 8 and 16 bit boards, prices too good to justify producing a new one. Douglas Electronics still carries them too, and their prices are very reasonable.

Laying one out should be an hour or two in KiCad, but there is no need to make the investment in a board run with the current supply.

 

[DeathAdderSF]

If you are willing to waste the 2MB from that card to load DOS "HIGH" in order to gain free conventional memory, there is another path: USE!UMBS and DOSMAX. With these two drivers you can load DOS in the Upper Memory Area
All info in this thread

Wow, that's brilliant! Using your instructions I've shot free conventional memory up to 634k.
Thanks a lot for the help.

 

[RamonSmith]

Thanks for the advices I am also facing the same issue.