Service manual

MZ-800
~
port SEO
MODE
-
Function o SOOOO - S7FFF
to DRAM.
0000
1000
2000
3000
4000
DRAM
5000
6000
7000
8000
I
9000
I
I
Aooo
I
I
BOOO
I
COOO
I
I
Dooo
I
I
EOOO
I
E070
Fooo
I
I
FFFF
L __ ..J
Memory Sank Control
SEl SE2 SE3 SE4
MZ-7oo mode
MZ-SOO mode
-
MZ-7oo mode MZ-SOO mode MZ-7oo mode MZ-800 mode
o Soooo - SFFFF
o SEooo - SFFFF
o SOOOO - $OFFF
o $0000 - SFFFF o SEooo - SFFFF
o SOOOO - $OFFF o SOOOO - $OFFF
to DRAM. to DRAM. to monitor to VRAM, key
to
monitor
to
monitor
to
monitor
ROM. timer,
and ROM. ROM. ROM.
monitor ROM.
o Slooo - $CFFF o Slooo - SlFFF
to DRAM to CG ROM.
o Soooo - $FFFF o S2000 - $7FFF
to VRAM, key
and
timer, and
$Cooo
- SDFFF
monitor ROM. to DRAM.
o
$8000 - SBFFF
to
VRAM
(NOTE).
o SEooo
- SFFFF
to
monitor
ROM.
i--l
,---,
MONITOR
'--I
1--'
MONITOR
MONITOR
I I
ROM
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ROM
ROM
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DRAM
CG
ROM
DRAM
I
I
I
V RAM
I
r-- ---
I
I
I
I
(NOTE)
I
I
I
I
I
I
DRAM
I
I
V RAM
I
V RAM
B
I
KEY, TIMER
DRAM
I
I
MONITOR
MONITOR
ROM
I
ROM
I
L __ J
Area within dotted line does not involve change.
DEY, nMER
MONITOR
ROM
MONITOR
ROM
----1
(NOTE): In the case of 320 x 200 mode, contents of $8000 - $9FFF are transferred, instead,
and those after $Aooo are transferred to DRAM.
Power on or RESET input
7