; ( n -- ) ; Interrupt ; executes an interrupt service routine ;VE_ISREXEC: ; .dw $ff08 ; .db "isr-exec" ; .dw VE_HEAD ; .set VE_HEAD = VE_ISREXEC XT_ISREXEC: .dw DO_COLON PFA_ISREXEC: .dw XT_INTFETCH .dw XT_EXECUTE .dw XT_ISREND .dw XT_EXIT