WIP: 16C firmware hack for more memory

[RPNerd]

(08-24-2024 01:38 AM)brouhaha Wrote:  See the keyboard section of the Nonpareil 15c.ncd.tmpl file, starting at line 187.

Thanks, that's a great help. Stuff like this (in the HP-10C ROM) is beginning to make more sense:

Code:


0028:2b9 000                    GSUBNC 00ae        ; Get the current pressed key
002a:366                        ?A<>C X            ; If not 018
002b:360                        RTN C            ; ...then return
...
...
...
; Loads the current pressed key into A.X and 018 into C.X
00ae:04e                        C=0
00af:220                        C=KEY
00b0:03c                        RCR 3
00b1:106                        A=C X
00b2:130 018                    LDI 018
00b4:3e0                        RTN

With the values in that template file (key $018 is the ON key) I now know exactly what the calc is looking for and also stuff like GOKEYS will make more sense.

Again, thanks for the insight.