Specifications
TABLE
VII
QUARK
PIN
CONNECTIONS
AND
FUNCTIONS
(CONTINUED)
PIN
GROUP
DESCRIPTION
------------------------------------.----.--------------
A-17
A-18
A-19
A-20
A-21
A-22
A-23
A-24
A-25
A-26
A-27
A-28
A-29
A-30
A-31
A-32
B-1
B-2
8-3
8-4
8-5
8-6
8-7
8-8
8-9
8-10
B-11
8-12
8-13
8-14
8-15
8-16
8-17
8-18
8-19
8-20
8-21
8-22
8-23
8-24
8-25
8-26
8-27
8-28
8-29
B-30
8-31
8-32
DISK
Step output to floppy disk drive (active
low)
DISK
Write
gate output to floppy disk drive (active
low)
DISK
Floppy
disk drive side select (active
low)
DISK
Ground
P1
PIA
PA2
parallel
1/0
line
(KBD2)
P1
PIA
PA4
paralleL
1/0
line
(KBD4)
P1
PIA
PA6
parallel
1/0
line-
(KBD6)
EXP
BUS
Ground
EXP
BUS
lSOB
data
busD1
EXP
BUS
laoB
data
bus
D7
EXP
BUS
ZSOB
data
bus
D6
EXP
BUS
Z80B
data
bus
D3
FLOPPY
Floppy
disk
index
signal input
RESERVED
Reserved
for future
hard
disk version
POWER
Ground
return line
POWER
Ground
retu m line
(active
low)
CRT
TTL
video signal out
(GREEN
output on
QUARK/150)
SIMPLEX
Printer
busy
input
FULL-DUP
RS-232C
RTS
output
from
ACIA
FULL
-DUP
RS-232C
DSR
-i
nput
to
AC
IA
P2
VIA
PAO
paraLlel
1/0
Line
P2
VIA
PA1
paralLel
1/0
line
P2
VIA
PA2
paralLeL
1/0
line
P2
VIA
PA3
parallel
1/0
line
P2
VIA
PA4
parallel
1/0
line
P2
VIA
PAS
parallel
1/0
line
~~
P2
VIA
PA6
paraLleL
1/0
Line
~
P2
VIA
PA7
paralLel
1/0
line t
·0
PAR
PTR
ParaLLeL
printer
acknowledge
input
to
VIA
r?~-
¥0\K
~1/
L·~r\/\\)
I
EXP
8US
lB08 address
bus
A2
"_
~
~
EXP
8US
l80B
address
bus
A4
DISK
Ground
A
~
l ,.!;J.K
v,
O-{J
--.A
DISK
Use
for
Disk
Size
Mode
(user modification)
~
•
~
Q'
DISK
Floppy
disk drive select
#3
output (active
low)
; I 0 v
DISK
FLoppy
disk drive select
#0
output (active
low)
~
(~
DISK
Ground
~
\J
P1
PIA
PAO
para
llel
1/0
line
(KBDO)
~
P1
PIA
PA7
paralleL
1/0
line
(KBD7)
P1
PIA
CA2
control line
(KB
STROBE)
EXP
8US
l80B
address
bus
A1
EXP
BUS
Power-on-reset output (active
low)
EXP
BUS
l80B
WR
control line (active
Low)
EXP
8US
lBOS
RD
controL
line (active
low)
EXP
8US
l80B
INT
input
Line
(active
low)
FLOPPY
Track
00
sense input (active
low)
RESERVED
Reserved
for future
hard
disk version
POWER
+5V
regulated input
POWER
+5V
regulated input
------------------------------------------------
Megatel
Computer
TechnoLogies
Toronto,
Canada
Appendix
Page
A-10