
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.
MZ3500
RAM
BANK
SELECT
МЛЗ 0
\ МЛ2 0
I MAI 0
I MAO 0
MAIN CPU
0 0
1 1
0 0
0 i
MSI = 1 (H )
MSO = 1 ( H)
SUB CPU
cooo
BFFF
IFFF
0000
I I г
RAM в
2 I 3,
RAMA
lU 4L. 4U
ROM!
----
1—
RAMC
2j- -
----
1
-----
1
KAMI)
3,
ЕЩх
\\
\'
\\
' \
\v
RAM
sp
RAM
SC
RAM
EAM
_SA
\ ЦМ(СШ)
ROM I PI
ROMS
ROM BASE
OF THE
SUB CPU
ROM («02 0 0 0 0 1
BANK (mo) 0 0 1 ' 1 0
SELECT /moo 0 10 I 0
1. Bank select, MA0-MA3, is effective for memory area COOOH-FFFFH.
2. Bank select, MO0-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.
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