|Re: HP 42S what can we do with a 2nd rom?|
Message #4 Posted by Diego Diaz on 27 Sept 2009, 8:55 p.m.,
in response to message #1 by nacho
May be a little too late, but I for one, have built the HW mods in order to create a "Frankens-42-MLDL" with access to the memory bus.
Regrettably I'm on the lowest end on Saturn assembly knowlegde, but since I met Mr. Giesselink at last Alshwill meeting on Nov. '08 I find an interesting field for experiment and development... although (as Raymond has pointed out), most users won't let their valued and valuable 42's in foreing hands under no circumstances. Which turns all this in a project of myown in the long term.
My interest is, by one hand, simply knowledge; and by the other hand, if I only could get...
- a way to create 42's RAM back-ups (may be IR input?)
- PC connectivity (serial or serial converted to USB externally)
- a real time clock functions set, as those in the TIME module of the 41
... then I may try a 128KRAM upgrade also.... ;-))
Oh, well, it's real late here in the Canaries, may be I'm just dreaming.