When you first start up the PDP-8 you will have whatever contents were left on the device by the previous users. This included the first 16K of memory since that is core which does not loose its contents on power off. The second 16K is SRAM which does loose its contents on power off.
By using the buttons for the various devices you can load or save the contents of that device. For the memory you can load a rim format tape into memory but currently can't write out the memory contents.
Feel free to contact me, David Gesswein firstname.lastname@example.org with any questions, comments on the web site, or if you have related equipment, documentation, software etc. you are willing to part with. I am interested in anything PDP-8 related, computers, peripherals used with them, DEC or third party, or documentation.
PDP-8 Home Page  PDP-8 Site Map  PDP-8 Site Search