( my test file, junk )
:dev/r fff8 ( std read port )
:dev/w fff9 ( std write port )
;x 2
|0100 @RESET
,00 ,dev/w STR ( set dev/write to console )
+1234 -0012 ADD^!
BRK
|c000 @FRAME BRK
|d000 @ERROR BRK
|FFFA .RESET .FRAME .ERROR