HP-28S: Key press problem

[rprosperi]

(07-25-2017 01:48 AM)Jlouis Wrote:  Is Metakernel pre-installed on the 48's later calculators?

I think this is not true, as I have some of the last ones, black LCD, from 2001, 2002 and there's no MK.

The 49g had MK, IIRC.

You are correct, it's in the 49G, 49G+, 48GII and 50g as a core part of the ROM, but was never included in any of the 48G series. (the 48GII is not really a 48G series, just some marketing decision to make it appeal to 48G users that didn't want to spend as much as the 49G+ and 50G).