I wrote: I now have (some of) the relevant manuals. If you have the RL-P1004A printer/cassette interface, the top-level menu item is "PRINTER/CASSETTE", under which item 2 is "CASSETTE LOAD/SAVE", and it's all fairly obvious. I've got one of those now, but at the time I posed the question, the only cassette interface I had was part of the RL-P4003 acoustic modem (vs. the RL-P4001, which doesn't have the cassette interface). However, my RL-P4003 doesn't add any obvious menu items for the cassette. The RL-P4001 and RL-P4003 modems and the RL-P3001 RS-232 interface differ from the other HHC periperhals in that their control ROM is socketed and can be replaced by the user. I think my modem/cassette interface has the wrong ROM in it, and that the correct ROM would have the cassette routines. I'm still looking for an RL-P1002 color plotter (which I think uses the small ALPS mechanism also used in plotters sold by Radio Shack, Atari, and Sharp), an RL-P8001 EPROM programmer, any software other than Microsoft BASIC, SnapBASIC, SnapFORTH, and insurance software, and any technical documentation or software documentation (including docs on MS BASIC, SnapBASIC, and SnapFORTH). Eric