Still needed for the HP 41CL

[Ángel Martin]

(08-05-2016 02:52 PM)Sylvain Cote Wrote:  

(08-05-2016 01:42 PM)Ángel Martin Wrote:  However I've looked at the manual and those 222 data files may be a problem: assuming each of those requires 10 registers, we're talking of a humongous database of ~15k !! More than three ROMS just to put all that data in...

I did not looked at that part yet, but you are right this is an issue, actually it is worst than that.
Using the raw version of the W6X who contains a parser and 4 data loader as a reference, the math gives the following:
512 bytes (RAW) / 4 (data loaders) = 128 bytes / 7 (bytes/register) = 18.29 -> rounded to 19 registers
19 registers (133 bytes, per data loader) x 222 data sets = 4218 registers or 29526 bytes.
Adding to the already used 8KB for program code we are looking at something like a 40KB ROM which does not fit into the 32KB directly available.
Even with all the tricks that can be applied, 4 x bank switching, a bank switcher function in MCODE, etc, we are still looking at a 2 slots solution for the 41CL or an MLDL (Clonix/NoV/MLDL2K/etc).

Well maybe we're both wound around the axle here and it's not that bad: each data file won't take 10 registers, times 7 bytes = 70 bytes - but only as many bytes as needed, which it's a function of the constants values. Looking at those values the average is around 5-6 bytes per value, for a total of 50-60 bytes per data file...

Friday evening, my brain is fried so this may be complete BS... let's ruminate on it a little longer before we make a call one way or another.