Sharp MZ-3500 User Manual
Page 42
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4-10. Character VRAM select circuit
MZ
3500
[Circuit description]
With
respect
to
GCD1,
the
assignment
during
read/write
of the character VIDEO-ROM is per the table below. The
character
VRAM
select
circuit
is
provided,
io
accomplish
this function.
A #07i-F
)
€116.2K*8 }
Latter half of
attribute
A S
l
Q
(
First half
= I OU #0000
V-KAW
of attribute
t
0 =
T
#07FF
I
#0400
#03FF
/
AK10 = Low #0000
ARIO = HI
47 -
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