Sharp PC-1500 Technical Reference Manual page 110

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4-3-4. 1 /0 PC
When the p111 l\o. J4 cMEO) of the I 0 PC ;,connected \\ith MEI of the C PU. it " ill be
ac<:c-sscd
a~
the M f. 1 area.
(j) PC-1500 1 / 0 PC
Pin no. Signal name
Otscripllon
1
PAI
K!'r_ slro bc
2 PA2
Key s trob-0
3
PAJ Key Sl(Ot>c
4
PM
K ey sirot>c
I
s
PAS Key strobe
6
PA6
K~strobe
7
PA7 Ke:t: strobe
8
GNO GNO
9
PBO
~
Not used
10
P01 Not used
11
P02
Scnal d aln in put ho•n the cassette
t(lpe
12
Pl13 VCC (C)(PO!I 1nodcl), () NO (d omest ic n1cdel)
13
P04
GND
I
14
PBS
i 11nc 1 COrl lrOI
1S
PBG
Timer con!rol
,.__ 16
PB7
ON k.!l__ 1npu1 I
17
P<>
GNO
I
18
•
PCO
Timer control
I
19 PC 1
Tuner COOlrOI
I
20
PC? Timer conlrol I
f-%-
PC3
T1met control
'
2
PC<
T
11ncr
contro l
I
23
PC!i
Timer cont rol
2-1
PCG
Buzzer on/o fl co1uro1
25 f> C7 N ot used
26
cso c
I
".I!_
se lec tj!' D 1 ?J_
27
CS1
ch:P
scicct::i: A O 1:11:
28
rn
Chip select
29
nso
Ctup select {AOO)
.
30
RSI
C hip
sctcc:t
(A01 )
JI
l
RS2
Chop select (AD2)
3? RSJ
Chop select (ADJ)
I
33
I
R \•/
J.~ emcry
rcaO /wt1tc
3•
MEO t,,.,EO
are~
dosiqntn•on
35
ME I
t\' 1 E
1
atc.:i
<1cs1 onri11on
36
WO
VJA IT c ondition 1 n1 >u1
37
WI
VJAI T cond1t 1 on lneli t
38
GND GND
39
vcc vcc
40
OMEO
Ct11p
ootect
1ak1.n9 consideratton ol WAIT con<11tion (Oss1 gnr11cnt of
MEO a1ca)
41
OMEt Ctup
s.cJe<.:t tak mg
cons.C:erati<>n
o l WAIT cond1t1on
(;11s.i911men1
of
42
r
\\IAIT
!
~. 1E
1
area)
\~/AIT
to CPU
•3
INT
lnlerrupl to CPU
••
nESEl
11 0 po11 reset 1npu1
4S
IRO
Interrupt
input
• 6 l'JOS B asic clock 1 npu 1
'17
CLI CMT C:o1 nodulnt1on
CIOCk
1npul
i---,-8
$ 0 ) V cc tevcl
• 9
LC
I
NOi uSC<t
50
CLO
C&1T signal
S1
SDO Senal da1a ouH'.>ul 10 cassette tape
52 DO
DatJ b ::: u :: • : - - - - - - - - - - - - - - - - - - - - -- '
53
01 Data bus
s•
02 Data
b U$
J
SS 03
0..1tJ
bvs
I
Rf
04 Data bu:s
05
Oata bvs
DG
Dalil bus
L
59
07
Data bus
I
60
rAO
Key
sirobc
-
105
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