Sharp MZ-800 Use and care manual

Personal Computer
lllZ·OOrnJrnJ
TECHNICAL REFERENCE
MANUAL
SHARR,

Personal Computer
111Z·00(Q)(Q)
TECHNICAL REFERENCE
MANUAL
©SHARP CORPORATION

CONTENTS
MZ-800 HARDWARE
1 System description ······························ ························································· 1
2 Block
diagram
2
3 Memory map ······ ··············· ········· ································································ ·· 3
4
Custom LSI ·• ··············································· ······· ··········································· 6
4-1 Memory controller ····························································································· 6
4-2 1/0 controller ··································································································· 6
4-3 Clock generator
and timing generator ···········.......................................··········· ·· 9
4-4 Display address generator ················································································· 9
4-5 Scroll ············
·· ············· ·· ·· ·· ········ ·· ··· ·· ············ ·· ············· ·· ····· ·· ····· ·· ······· ·· ······ ·· ··· 10
4-6 VRAM data input/output circuit ························· ·· ············································· 12
4-7 Register functions ···········································································-················· 17
4-8 Pallet ····································································································-···-·-· 22
4-9
CRTC register map ··································-······················································· 23
4-10 ROM configuration ·························································································· 24
5 8255 Programmable Peripheral Interface ......................................................... 24
6 8253 Programmable Interval Timer ······················· ····· ···················· .................. 28
7 Printer interface ·································································· ··························· 28
8 Programmable sound generator ····································································· 31
9 Joystick ···· ···················· ····· ·· ······ ·· ······ ····· ···································· ······ ·········· 32
1
0 Power supply ····························································································· 33
10-1 Block diagram ································································································ 33
10-2 Operational description ············-·····························-········································· 34
10-3 Maintenance ··································································································· 34
10-4 Problem determination and sequence ·································································· 34
11 MZ-1P16 ··································································································· 35
11-1 Installation ······································································································ 35
11-2 Block· diagram ................................................................................................ 36
11-3 At power
on ··································································································· 36
11-4 Colour change operation ···················································································· 36
11-5
Pen change operation ······················································································· 36
11-6
Pen exchange method ······················································································· 37
11-7 Stepping motor driving signal ··········································································· 37
11-8 Colour position detector ···················································································· 37
11-9 Character set ···································································································
37
11-10 Colour plotter printer control LSI ········································································ 38
11-11 Interfacing with the MZ-800 ·············································································· 39
11-12 Block diagram ................................................................................................ 39
11-13 Colour plotter printer control
codes ····································································· 40
11-14 Graphic mode commands ················································································· 41
11-15 Specification ··································································································· 42
11-16 Circuit ············································································································ 42
12 CPU P.W.B. Circuit ······················································································· 43
ii

MZ-800 SOFTWARE
1 Character generator (C.G.) ·············································································· 45
1·1 How to modify e.G. ROM ················································································· 45
1-2 e.G. Table ··············································'······················································· .46
1·3 e.G. ROM dump list ·························································································· 48
2 MZ-800 Monitor subroutines ........................................................................... 52
3 Assemble list .... ~ ........................................................................................... 67
3-1 Monitor< 1Z-0138> ....................................................................................... 67
3-2
MZ Disk control < 9Z-504M-Vl.Oe> ..................................................................100
3-3 Mini-floppy disk control ...................................................:................................111
3-4
ROM Monitor ............................................................................................,........117
4 Z-80 Programming reference ........................................................................... 138
4·1 Z-80 Status indicators (Flags) ............................................,..............................138
4-2 Notation ......................................................................... ~ .....····························140
4-3 Z-80 Instruction set .............................;............................................................141
INDEX ···············································································································173

1 System description
~-ceu
I I Z~A
I IL..- ____ .....J
Basic RAM, 64KB
PPI
8255
0 = 3.547 MHz
_j~
~~--------~~~-C-M_T_V_F--~1~_.------4-~
I
L:
CTC
8253
MONITOR
CGROM
L.-------.....J 16 KB
r---,
I I MZ-1P16 OP
I r -.L- - --, 1
l_~ Plot printer 1 J
l_ / --J
~-
PlO
Z-80 PlO
L__j I · MZ80P5K printer
~ Printer interface Jl)-'-
.,...,...-
-----
1
-,_
,-----t---lL:Jo:y~st:ic=k~in~t:erf:a:c:Je~~
PSG
SN76489
.~
L..-.-------1
r_{_""l l
Expansion slot-1
~ (ATARI compatible
.l RGBI
CRTC '(
VRAM
16 KB
(Semi-custom)
r ..,
I VRAM I
r--
.&... RF
Color 1 I
encoder I
.--0
~
Video
HZ-1R25
16 colors CRT )
MZ-1019
l
0
0 0
TV
I I MZ-1R18 slot I
\I,,, .. ..,, I
L-- _._.J __
I 16 KB (OP) I
___ L ______ ....J ___ __j
MFD MZ-1F02
1
RS·232C
MZ-88103

!17.73 MHz
0 = 3.547 MHz
CPU ~
" ,_ E
_l
~ Option 16 KB
RESET
GDG
VRAM ADR. BUS VRAM
16 KB
VRAM DATA BUS
~
~
I ~,,. •• IC :;'
VRA5 WE CAS
ADDRESS BUS
J DATA BUS
ICJ
~11 CONTROL BUS
L_
r-
.._
Peripheral VO bus
r===Jn
I 1 •,1 C~~T Ogj
L...-.r
8253 h
n
.,
"'
.0
J J
..i.l~
c:
.~
.,
c:
.,
c.
X
w
v
~
Z-80A
L--------:---11-><
OSCI Cursor
556
KEY
DATA
PA
8255 I PlO
OUT2~------;PA5
.!1
.,
>-
0
PBI PRINTER DATA BLJS~ \0
CTRL BUS ~ -, ~/"""'
PC21 I I I
t---
I~
~ ~"
~
~·
KEY
STROBE
r
:BOAR~ J w
AMP
DATA
RECORDER
PA' ~f)II.__L___.____:.
l~~
~~ System switch
.)J (MZ -Centronics)
VBLN--fPA4
SP
External
printer
bus
I\)
D:l
0
0
';11:"
c.
~·
CO
...
I))
3

3 Memory map
The MZ-800 has a different
memory map depending on
Q MZ-800 memory map
EOOO
0000
MAIN
D-RAM
8000 ----- -64-K&-- -
4000
2000
1000
oooo.
MZ-700mode
D
bd
.---,
~
~
ROM
VRAM
MZ-800 mode
MAIN
D-RAM
the mode. To have compatibility with the MZ-700, it has
two modes of the MZ-700 mode and MZ-800 mode.
~
t:J
- [] \J D DV-RA~--,
I I I I
I I I 1
I I l D I !m} I
I : : :
------ -L •• .J ._ __ J
r---,
I I
I I
: IIVI I
' I
o I
L--..1
~
640 x 200 mode
~
VRAM
320 x 200 mode
NOTE: r---.
I I
:m:
I I
... __ .J
Item within darted line
represent!l an
option unit
MZ-1R2S
Memory map changes after initial program loading
$0000
$1000
$2000
@ Power on (reset)
MZ-800 mode
MON. ROM
CG. ROM
DRAM
@At start of monitor
MZ-700 mode
$0000 ...--------.
MON. ROM
$1000 ~------1
LD A, OSH
©Write to PCG from CG
MZ-700 mode
$0000
$1000
$2000
MON. ROM
CG. ROM
@ System operation
MZ-700 & 800 modes
$0000
OUT (CE), A IN
(EOH), A
$8000
=>
DRAM
V-RAM
(320x200 mode)
DRAM
$0000
V-RAM
$EOOO $EOOO
$E010
MON. ROM
MON. ROM
$FFFF
$FFFF
• Memory map at power on is in the MZ-800 mode as
in @, but it changes to the MZ-700 mode by the
monitor ROM when the monitor program starts. After
transferring the
CG data to the VRAM PCG area from
the CG ROM at @, the memory map then returns to
@.
• When the system program is completed to load, the
memory map goes into the MZ-700 mode if the
system switch (SW1) is set
to ON side. If set to OFF
side, it changes to the MZ-800 mode, then the
memory map as in @. During those changes, all
memory spaces are composed of RAM and isolated
from ROM and VRAM.
3
D-RAM
D-RAM
==>
IN (E1H), A
<=
$COOO
V-RAM (CG)
$0000
V-RAM
$EOOO
$E010
MON. ROM
$FFFF
SFFFF '---------'
• Depression of the manual reset switch ~ssumes
memory map transition in order of @ ---+ @ ---+ @ ---+
@, similar as in the case of power on.
• ·However, depression of the reset switch in conjunc-
tion with the I CTRL Ikey assumes the memory map of
@after being changed once to the MZ-700 or MZ-800
mode depending on the state of the system switch. In
the case of the MZ-800 mode, it is set to the plane I,
II (4-color mode) of the 320 x 200 mode.

~t
rt
$EO
MODE -
Function o $0000 -
$7FFF
to DRAM.
0000 T
1000
2000
3000
4000
DRAM
5000
6000
7000
8000
9000
AOOO
8000
cooo
DODO
I
EOOO
I
E070
I
FOOO
I
I
FFFF
L __ _j
Memory Bank Control
$E1
$E2 $E3
$E4
MZ-700 mode MZ-800 mode -MZ-700 mode
MZ-800 mode MZ-700 mode
MZ-800 mode
o $0000 -
$FFFF o $EOOO - $FFFF o $0000 - $0FFF o $0000 - $FFFF
o $EOOO - $FFFF
o $0000- $0FFF
o $0000 - $0FFF
to DRAM.
to DRAM.
to
monitor to VRAM, key
to
monitor
to
monitor to
monitor
ROM. timer, and ROM. ROM. ROM.
monitor ROM. o
$1000- $CFFF
o $1000- $1FFF
to DRAM
to CG ROM.
o $0000 - $FFFF
o $2000 - $7FFF
to VRAM, key and
timer, and $COOO - $DFFF
monitor ROM.
to DRAM.
o $8000 -
$BFFF
to
VRAM
(NOTE).
o
$EOOO - $FFFF
to
monitor
ROM.
~--l
,---,
,--,
~--,
I MONITOR
I I I ROM I I I I
I
I I I I I I I
I
I I I I I I
I I I I I
I I
I I I I
I I I I I
I
I I
I I I I
I I I I I I
I I I
I I
I I I I I
I I I I
I I I
I I
MONITOR
ROM
DRAM
MONITOR
ROM
CG
ROM
DRAM
I I
I I
I
I
VRAM
I I I
----
I I I
I I
I
I I I
I
I I
I r I
I I
VRAM
I
VRAM
(NOTE)
DRAM
B
KEY, TIMER
DRAM
I
I I MONITOR MONITOR
I ROM ROM
I
L __ j
KEY, TIMER
MONITOR
ROM
MONITOR
ROM
Area
within dotted line does not involve change.
____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
4

~
OUT ($E5) OUT ($E6) IN
($EO)
IN ($E1)
MODE MZ-700 mode MZ-800 mode MZ-700 mode
MZ-800 mode
MZ-700 mode MZ-800 mode
MZ-700 mode MZ-800 mode
Function o $0000 -$7FFF o $EOOO - $FFFF
o $0000 - $FFFF
o $EOOO - $FFFF
o $1000- $1FFF o $1000- $1 FFF
o $1000- $1FFF o $1000- $1FFF
prohibited. prohibited. returned
to
retur'led
to to CG ROM. to CG ROM. returned
to returned to
the state be-
the state be- o
$COOO - $CFFF
o $8000 -$BFFF
the state be- the state be-
fore
prohi-
fore
prohi-
toVRAM (PCG
to
VRAM
fore CG was fore CG was
bited. bited. RAM). (NOTE). set. set.
o $COOO - $CFFF o $8000 - $BFFF
to DRAM. to DRAM.
0000
,--l
~--l
,--,
,--,
~--l
,--, ,--,
r--~
I I I I I I I I I I I
1000 I I R
~ B B
I
2000 I I MM
I I I I I I I I
I I I I I I I I
3000 I
I I I I I I I I
4000 I I I I I I I I
I I I I I I I I
5000 I I I I
I I I
I I I I I
8000 I
I I I I I I
7000
I·
I I I I I
I
I I I I
8000 I
I I
9000
VRAM
I I
I
AOOO r----
I I
DRAM
I
BOOO
(NOTE)
~
cooo
VRAM
I
(CGRAM) I I
0000 I I I
EOOO
I I I I
Prohibited State before I I I I
prohibited
I I
FOOO
Prohibited
State before I I I I
prohibited
I I I
I I I I L
__ j
FFFF
L __ _j L __ _j
L __ _j
5

HARDWARE