/part 12
/test add, szo, sub

0/

	12	/program number
stt,	szs 10	/if up
	hlt	/halt after read-in

/begin test of szo

	szo	/turn off overflow flip-flop
	szo i	/check that szo i doesnt skip
	szo	/should skip
	hlt	/error
	szo i	/should not skip
	skp i
	hlt	/error

/start of add test

	cla
	add zro	/test add of 0s
	sza
	hlt	/error
	add pmx	/377777
	sas pmx
	hlt
	add zro
	sas pmx
	hlt	/error

	cla
	add nmx	/400000
	sas nmx
	hlt	/error
	add zro
	sas nmx
	hlt	/error
	szo	/should be no overflow
	hlt	/error
	add pmx	/-nmx
	sza
	hlt	/error

	lac zoz	/252525
	add zoz	/set overflow, check carry
	sas ozo	/525252
	hlt	/error
	szo i	/overflow should be on
	hlt	/error

	lac ab	/125252
	add ab	/check carry for even ac bits
	sas ac	/252524
	hlt	/error

	lac ons
	add zro
	sza	/-0 should clear
	hlt	/error



                                	szo
	hlt	/error
	cma
	add ad	/000001
	sas ad
	hlt	/error
	szo	/should be off
	hlt	/error

	lac ozo	/525252
	add ons	/-0
	sas ozo
	hlt	/error

	lac zoz	/252525
	add ons
	sas zoz
	hlt	/error

	szo	/still should be off
	hlt	/error

/end of add test

	cla	/initialize
	dac tmp	/for sub test
	cma

/begin test of sub

lp,	sub mon	/-1
	dac qem
	idx tmp
	sas qem
	hlt	/error

	sas zro	/loop for 777777 times
	jmp lp

/end of sub test

	szs 20	/if up,
	jmp stt 2
	jmp 7772	/read in next test

ons,	777777
zro,	000000
pmx,	377777
nmx,	400000
zoz,	252525
ozo,	525252
ab,	125252
ac,	252524
ad,	000001
mon,	777776
tmp,	000000
qem,	000000

start stt