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MZ3500
2-4.
SD3
(RAM based BASIC)
SD3 is
active
when "SHARP BASIC"
is
ececuted
via
RAM.
"SHARP
BASIC"
is
loaded
in RAM
from
the
floppy
disk.
RAM
BANK
SELECT
ROM
BANK
SELECT
MAS
MA2
MAI
MAO
Ffft
\
gFFF
1FFF
0000
M02
[NOI
MOO
MSI
= 1< H)
MAIN
CPU
MSO
= HH) SUB CPU
0000
0000 III!
1
0000
1111
0000
1
0011 001) 0011
1
0101 0101 0101
1
III III III
l
R
wnuf
%
r
1
\\
RAMB
RANC
KAMI)
v
\
\v
1
2,3,4
1,2,3,4 1,2,3,4
\\
\\
N\
-
v
x
\\
RAN.
SP
\\
RAN
SC
, \ ,
RAM
SB
KU
"°
RAMA
ROM!
ROM2
KOM3
K(IM4
\\ ROM BAS
k
' SUB CPU
]L
ROM
1 PI
000 0 ) i ]
0
0 1 " 1 0 0 1
010
10 1 0
1.
Bank select, MAO-MA3.
is
effective
for
memory
area
COOOH-FFFFH.
2.
Bank select, MOO-MO2,
is
effective
for
memory
area
2000H-3FFFH.
Operational description
The
state
of the
system
is
determined
by the
bootstrap
program
before
the
load
of the
system
program.