Posts: 304
Threads: 23
Joined: Jul 2007
Dear Jürgen,
an additionally test would be loading the RAM-Box pages with ROM image files and list them with CAT 2.
Ask the former owner in which way he stored the RAM-Box : Pluged to the HP41 (this would be best because than HP41 supplies the RAM-Box) - or stand alone in a box - than the internal lithium cell supplies the internal RAM circuits. Unfortunately the lithium cell have a limited live time in the range of 10 years. When the batterie falls down you will lost the internal operating system of the RAM-Box.
If the RAM-Box includes no bank switching than reloading the operating system is easy.
Last not least from W&W exist a 32 KByte RAM-Box with some dip switches placed on the rear side. This unit is absolutely service friendly - and includes some special address features which are helpfully for some HP41 applications.....
Best wishes for testing the RAM-Box - you also know alternative solutions like NoVRAM or the MLDL2000 unit :-)
Christoph Klug
Posts: 128
Threads: 25
Joined: Jan 1970
Thank you Mike! It's a 32k Rambox. I thought there is some kind of self test. You wrote that on Cold Start it should ask some question: what kind of questions?