If you have converted your 2068 to a Spectrum and have the Aerco parallel printer interface, here are the changes needed to run the print driver software supplied with the interface while in Spectrum mode.
First place your computer in Spectrum mode and load in the Aerco print driver software. When loaded, break into BASIC (don’t initialize it like the program tells you to do – you’ll just crash). Once in BASIC, LIST line 9992 and EDIT. On line two and three where it says POKE 26704 and POKE 26703, change the 20704 to 23750 and change 26703 to 26749. Press ENTER. In the inmmediate mode (no line numbers) enter:
POKE 64441,201
POKE 64521,84
POKE 64522,31 Now run the program with GOTO 1 and choose the initialize routine. You are now set up to drive your printer while in Spectrum mode! Be sure you save this new version.