The important pins are D0..D7 which are connected directly to the CPU's "port 2" data bus. There's also ground, +5v, and various other

filesystem built on top of these EPROMs, which (I assume) "deletes" files by writing a bit to say that the file is no longer there, but The internal memory of the Model LZ64 holds around 64000 characters. In addition, one or more Datapaks can boost the storage capacity considerably - by up to 128000 characters per DatapaKOrganiser users can write their own programs with the 'Finance', 'Maths' or 'Science' paks, which provides the proprietary POPL If the procedure or notepad file you have chosen already exists on the Psion, you will be asked whether you want to overwrite it. If you choose N for no, then you will have to enter a different file name. In the case of a data file that already exists, you get the option of appending to the file (which will add the records of the incoming file to the end of the existing file) or to erase the file (which will erases all records of the existing file, before adding the incoming records).

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Flashpaks

Connecting the Comms Link 1.1 RS232 1.2 USB 1.3 USB Comms Link 2. Installing the software 2.1 CL.EXE 2.2 ORG-Link 2.3 Psi2Win 2.4 DOSBox 3. Using the Comms Link 3.1 Transferring data files and procedures 3.2 Transferring binary files 3.3 Using the Organiser Developer software Take a look at the Organiser II BBS online to find out about some recent work (by hobbyists far more talented & technical than I!). Link = Organiser II BBS.