protech SE-8134 - Page 127

Appendix B Technical Summary
SE-8134 SERIES USER MANUAL
Page: B-24
mov al, 1Eh
out dx, al
;--------------Set second as counting unit and start counting ---------------
dec dx
mov al, 0F5h
out dx, al
inc dx
in al, dx
and al, 30h
out dx, al
;----------------------Exit the extended function mode---------------------
dec dx
mov al, 0AAh
out dx, al