You don't need to place these in your code;
Code:
wsave VAR BYTE $20 SYSTEM
wsave1 VAR BYTE $A0 SYSTEM
Just uncomment them in your DT_INTS-14.bas file.

For assembly you need to use the ; for comments. INT_LIST macro should look like this;
Code:
INT_LIST macro       ; IntSource, Label, Type, ResetFlag?
  INT_Handler INT_INT, _ManualSwitch, PBP, yes
 endm
 INT_CREATE       ; Creates the Interrupt Processor
ENDASM
@ INT_ENABLE INT_INT      ; Enable external (INT) interrupts