2. main cpu and i/o port – Sharp MZ-3500 User Manual
Page 14
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3-2. Main CPU and I/O port
MZ3500
A2
YO
AS
B
M
A4
Yi
A
1
A5
Y2
N
A6
G2A
Y3
A7
C
P
lORQ
G2B
Y4
u
u
Y5
¥T
G1
YG
Y7
74 LS138
This paragraph discusses main CPU I/O
Connector
port select and addressing.
I
FC2
The
address
output
from
the
main
CPU
I
is decoded in the 74LSI38 to create the
I
select signal.
I Table below describes address map and
[ signal functions.
SKDC
O lOSF
I
L©
'MTR
!
MFUC
I
I
ijD lOMF^
lOABCMEMORY MAPPER)
- IT -
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