I have an Electron with Pres Plus 1, AP4 (with ADFS 1.15 ROM), AQR, ABR, Akhter 40/80 track 5.25" drive.

I have recently started to write programs in assembler and am having difficulty obtaining detailed information regarding certain operating system addresses. In particular I want to obtain:-

1. A full list of all operating system RAM addresses (&0000 to &0E00) with their functions, especially all addresses for interception of BREAK (&287 etc);
2. A similar listing of ADFS RAM adresses (&0E00 to &1D00);
3. 1770 DFS register addresses:
   Drive control register;
   Status/command register;
   Track register;
   Sector register;
   Data register;
4. Any available technical data for the cassette port serial communication.

In addition to the usual User Guides, the books I have are:

I would be grateful for any help.

Paul Woodward
Eastbourne, East Sussex

If this was our dearly missed Electron User, the knowledgable editor would now be reeling off a helpful list of double-dutch which only you clever people can understand. This ain't, I'm not! Someone help please!!

Will Watts, EUG #11