HP 71B Diagnostic ROM

[Reinhard Hawel]

Hi everybody,

(12-30-2013 07:03 AM)Raymond Del Tondo Wrote:  Hi Dave,

you could write a small BASIC or Saturn assembly program to check the RAM cells.
Given the relatively limited amount of maximum RAM such a program should get through within a few minutes.
While we're at it: Did you check if such a program already exists, maybe on the swap disks?

I don't remember such stuff on the swap disks (without looking there now). HP 71s failed rarely in the old times and in fact I've never seen a CPU, RAM or ROM failure