INIT
WANTSCREEN 

!Selective erase
RESET
PUSH "A\e[1\"qB\e[\"qC"
  ?screen_chars 0,0,1,3 = 0x41,0x42,0x43
PUSH "\e[G\e[?J"
  ?screen_chars 0,0,1,3 = 0x20,0x42

!Non-selective erase
RESET
PUSH "A\e[1\"qB\e[\"qC"
  ?screen_chars 0,0,1,3 = 0x41,0x42,0x43
PUSH "\e[G\e[J"
  ?screen_chars 0,0,1,3 =