Can someone confirm that the method to test the keyboard that can be found here at the Museum under HP 28s features works?
I have a hp 28s which doesn't pass the test but it's not a surprise, have the times you push a key you get nothing and the other have yooooouuuu geeeett many. But I have just found a new old-stock and the keys works but in the keyboard test I get the same 1 FAIL. I begins at the "A" on the alphabetical keyboard.
Another question, is there a way to have a thousands separator like in the Pioneers series?
On a 48SX I have it works when set to FIX mode but that doesn't apply to the 28.
More a curiosity than a question, on a HP 30s what is the format of the serial number? I guess is only CNYYWW, no real serial number.