HP-41 RAMBox Questions

[MeindertKuipers]

(02-22-2020 01:44 AM)Ángel Martin Wrote:  

(02-20-2020 05:12 PM)MeindertKuipers Wrote:  I use a pretty plain MOD file with 4K RAM, completely filled with 0's. Will do some more testing in the weekend. I have not loaded HEPAX though.

I checked the MCODE again: The "NO FAT" message only shows when the first word is non-zero and the second word (i.e. the number of functions) is zero. So it's not a RAM existence test, but a simple check on the first two words.... maybe not what you were looking for.

That explains a lot. However, it contradicts with the description in the OSX manual:
- Non-empty pages will show the first function in the FAT, or “NO FAT” if such is the case
- Empty pages will show the “NO ROM” message next to their number.
- Blank RAM pages will also show “NO FAT”, indicating their RAM-in-ROM character.

How is the check done fro a blank RAM page? It probably needs to have an XROM number? Still wpould be niceRAM ...