HP 41CL: Flash Database Wiki, Manuals

[Monte Dalrymple]

(11-18-2017 11:13 PM)hth Wrote:  After looking at various documents I concluded that the highest image on a pre-V5 board is 1FF, so any ROM above that does not fit.

What is the best way to use ROMs that are assigned numbers starting with 2 on a V4 board?

Håkan

You are free to organize the Flash memory any way you like, but like Bob said, doing
so will make it harder (but not impossible) to use the auto-update process. If you
want to use the IMDB (with the PLUG functions), that will need to be modified to
match your map. And the FLDB will need a similar modification if you also want to
try auto-updates (but that probably won't be necessary once you freeze your
custom layout.)

I have left two pages at the top of Flash (addresses 0x1FE and 0x1FF) open, at
least for now, if there's something that just has to be in Flash on your V3/V4
machine. I originally intended to leave more, but pages just got used up.

I can post the source files and merge program if there is interest. There are two
source files and a program to merge the resulting .rom files because of the 16-bit
nature of the IMDB.

Monte