Spectravideo MKI, Сервисное – Техническое руководство, Страница: 18 / 134

8 . KEYBOARD L INE t e s ting:
I f th e re is no e r ro r, "KEYBOARD
LlNE
OK" me s sage is printed, otherwise
"KEYBOARD LINE ERROR" me s s a ge
is printed
to indicate the KEYBOARD
LINE
is not func t ion ing p rope rly .
This t e s t is check ing al l 10
outputs
and 8 inp u t s, each ou tput
and
input a r e co r r esponde d ,
a
message
w i l l p r int t o in d i c a t e which
c o r r esp ond ing outpu t / input
line has error.
The e r ro r me s sage
for corresponding
output/ inp u t line as follow :
( 1 ) " E RROR
OU1'PUT
0 / I NPUT 2"
( 2 ) "ERROR
OUTPUT
1 / INPUT 1 "
( 3 ) "ERROR OUTPUT 2 / I NPUT 7"
( 4 ) "ERROR OUTPU T 3 / INPUT 6"
( 5 ) " ERROR OUTPUT 5/lNPUT 6"
( 6 ) "ERROR OUTPUT 6 / INPUT
5"
(7 ) "ERROR OUTPUT 7 / I NPUT O"
( 8 ) "ERROR OUTPUT 8 / INPUT 4"
( 9 ) "ERROR OUTPUT 9 / I NPUT 5"
( 1 0 ) "ERROR OUTPUT 1 0/ INPUT 7"
All ou tput=O (low ) , input
1
( h i gh )
A "KEYBOARD LINE TEST ING COMPLETED" me s s a ge is p r in t e d
at the end
when
erro rs occur only .
9.
JOYST ICK te s ting:
JOYST ICK
1---)
GREEN CUR SOR
JOYST ICK 2--- ) RED CURSOR
l[
erro r in (7 ) , ( 8) and ( 9 ) ,
check
PSG and PP I .
10 . In CP/M 2 . 2 2 ve rs i on sy stem d i sk e nclo sed mem t s t . com
memory test
in
CP /M mode
BIOS loca ted at E600
wh ich s t arts above t h i s p rog ramme and end s at B I OS .
S t art ing a dd r e s s (H EX ) 09BB
Ending add re s s ( H EX ) E5Ff
(1 ) B i t stuck high or low te s t
(2 ) Adjacent b i t s shorted test
(3 ) Checksum ( 5 5AAH pa t t e rn ) t e s t
( 4 ) Wa l king b i t le f t t e s t
( 5 ) Wa lk ing b i t r i ght test
(6 ) Add rEss line t e s t
(7 )
Random
numb e r test
cycle:
1 , 2, 3 , 4 , 5 , 6,7 , 8
(8 )
HI
cy
c l e t e s t - 4K b l ock:
3 .3