41: Clear main memory without wiping extended memory?

[PeterP]

Not close to a 41 to try this, but it depends if you have access to a CLONIX or other modul. A CLRBUFs, CLRKEYS, CLPS, and CLRGS should mostly do the trick (it deletes all buffers, key assignments, programs and registers).

If you dont have access to CLRBUF and CLRKEY (ie some of Angel's moduls or the CCD or HEPAX have these commands), but know your way around synthetic programming you can set the curtain in a way to have all main memory be registers and do a CLRGS or all main memory be program and do a CLPS (from the CX).