Sharp mz-800 Service Manual

SHARP SERVICE MANUAL CODE: OOZMZ8OOIIIIE PERSONAL COMPUTER MODEL MZ-800 MZ-1P16 MZ-1E20 Table of contents t, Specification .. 2. Parts identification

MZ-800 4-2. Custom LSI The custom LSI is a 100-pin single chip LSI on which the MZ-800 memory controller (I/O controller) and CRT controller, etc.

MZ-800 Pin Signal name 1/0 Functional description Note No. 1 CPU 0 CPU clock (3.547 MHz) 2 5V -Power supply 3 GND -Ground 4 ADO I I I CPU address bu

I MZ-800 Pin conflgur.tlon GNO ADO AOl AD' AD7 ... AOO AOA ADO ADC AOO AD' OTO on 072 073 0" 0" on on GNO TlM' m ~G JOY IIOII

4-2-3. Clock generator and timing generator Oscillation from the crystal oscillator is divided to create the CPU clock, horizontal sync, vertical

I MZ-800 4-2-5. Scroll 1) Scrolling is possible for both horizontal and vertical directions by means of software offset. The following four registe

Scroll and and control circuit hardware • Block diagram Start address SEA-SOF 10 DA(MA) 10 7 SEA DA(MA) 7 Scroll width SOF c Scroll offset Relation

MZ-800 Concept of the scroll control circuit Scroll method • Scrolling by means of VRAM address conversion. Range of scroll • y-axis programmable.

• Read For plane read data from the VRAM, data to be read by the CPU are arranged in accordance with the direction of the read format registe

MZ-800 ClK VRAS VCAS VOE VAD 0-7 VAO -7 lOAD MZ-700 MODE DISPLAY TIMING 56.3ns r=: 451ns ... 1 ~--------------~, ,'----''-_----'I

1) 320 x 200 dots See the figure below for VRAM configuration and CRT character display position. VA ve (option) $0000 0 0 1 1 2 2 I I 40 I I

1 SpedfIution -f-I-t I;:' -:::. .. . Dicpl'vmethod .CoIor 8'lm.p ... thod -Resolution PCGmalhocl 320 >e 200 ... ,,.. OP 320>e2

MZ-800 800 MODE (640 X 200 dot) DISP. cycle -I· CPU cycle -I· DISP. cycle VRAS ,'---___ ----~I \~--__ ----_~I \'-----VCAS \'---~/ &

4-2-7. Register functions VRAM configuration • One or two chips of 16 KB VRAM are used. • In the case of a single 16 KB VRAM chip, it handles 320 x

MZ-800 VRAM to CPU interface • As the CRTC bus is completely separated from the CPU bus, read and write of the VRAM is carried out through the

MZ-800 Table-2 Display mode vs read format register Display mode SRCH/SING B/A IV m n Function (NOTE) --------------r---------------+--------+-------

MZ-800 b) Write format register (WR) (OUT & CC) • WMD 0 - 2 ... Selects the logical operational mode for read-modify-write . • B/A (NOTE) Stand

c) Example of CPU read/write access • Shown next are access examples of REPLACE write, PS ET write, and SEARCH read in the 320 x 200, 16-color

MZ-800 4-2-8. Pallet • As there are four 4-bit pallet registers provided inside the unit, it permits choice of R, G, B, and I combina-tions, and it

(Ex.) An example of the pallet in use in the 320 x 200, 16-color mode • Assume that the pallet register has been set to the following. lPL

MZ-800 4-2-10. ROM configuration The MZ-700 monitor, character generator (eG), MZ-800 monitor, and IPL are implemented on a single chip of 16k x

From keyboard Key data PBO input pin I (a-p) PB7 VBlNK PC7 556 OUT PC6 PC2 READ PC5 MOTOR PC4 MOTOR PC3 ON WRITE PCl PCO To keyboard PA7 PA3 Key data

2. Parts identification I Front view I Definable keys RF connector Main keyboard Channel knob (home TV channel selection) BW/color select switch Comp

MZ-800 Key strobe is issued through PAo-PAl to ~can the key. As it is supplied to the decoder, it makes one of outputs, 0-9, set low. It is then add

MZ-800 See next for the contents of the information block. Name Byte count Function Note ATRB 1 Attribute NAME 17 File name (16 characters maximum) CR

MZ-800 4-4. 8253 Programmable Interval Timer The 8253 makes sound generated with the counter #0 and internal timer is operated with the counters #1

MZ-800 Pin name Pin No. I/O Signal name Description 00-07 19,20,1 1/0 Z80-CPU Data Bus Bidirectional, 3-state, Z-80 CPU bus. 40,39,38 Data and comm

MZ-800 Pin name Pin No. 1/0 Signal name TNT 23 0 Interrupt Request Ao-A, 15-12 1/0 Port A Bus 10-7 ASTB 16 I Port A Strobe ARDY 18 0 Register A R

MZ-800 Pin name 1/0 Active Signal name Function PAD IN L RDA A low on this line indicates that the printer data is ready to receive. W PA, IN L ST

MZ-800 4-7. Joystick It permits connection of two ATARI compatible joys-ticks. ADO JOY DT DT DT DT ~ 0 1 2 3 4 DT DT 5 ,l Gl G2 -<1-LS365 8255 >

5-2. Operational description The block diagram of the power supply unit is shown above. It adopts the self-excitation ON/ON control method. First,

MZ-800 2. INSTALLATION (Fixing the printer) 1. Fix the printer unit on the table as shown in the figure. (Place the printer in the arrow direction

3. OPERATION 3-1. Block diagram H \ \ Intelligent H j , Con-nector Buffer interfacing I---J r--LSI 1\ ,... Control switches {paper feed Reset Pen exc

MZ-800 3. System diagram MZ-1A18 AAMfile MZ-1A25 Expansion RAM MZ-1E19 MZ-1x17 MZ interface MZ-1E20 MZ-1U06 1 U06 interfacing PWB Expansion VO box M

MZ-800 3-2. Pen exchange method To remove pen, press the pen exchange button, when the slider is at the right handside, push the pen rel

MZ-800 3-6. Colour plotter printer control LSI Pin assignment Symbol Name In/out Function Vss Ground Connected to OY. Vcc Main power Connected to 5Y.

· ,vIZ-800 3·7. Interfacing with the MZ·800 Fig. 1 shows the block diagram for connection with the printer. Fig. 2 shows its circuit de

4. COlOR PLOTTER-PRINTER CONTROL CODES 4-1. Control codes used in the text mode • Text code ($01) Places the printer in the text mode. MZ-800 • Grap

MZ-800 4-3. Graphic mode commands 4-3-1. Command type In the graphics mode, the computer can control the printer with the following commands. The wor

MZ-800 MZ-800 1 2 3 4 5 , 7 • • 10 n 12 CPU P.W.B. Lavout o E F G H 46

Cassette Recorder Caution of the Assembling 2 • Be sure ® and ® must be in exact position. 3 Otherwise tape data will be destroyed when "play&qu

MZ-800 7 8 9 10 11 Cassette Recorder Circuit r------------------------------------------------·---·, "," Ht., J , . ." '[' 0

4. System description Basic RAM, 64KB KEY CMT VF AMP r---, I MZ-1R18 slol I I (dedicated) I L ___ -.J PPI 8255 CTC 8253 PSG SN76489 Expansion slo

MZ-800 I 1 I 2 3 I 4 I 5 6 I MZ-1P16 CIRCUIT " -c .. z ( .. , " M 51-' aO~OM -OS'lP cm ,------------, L ___ _ MZ·1P16 LAYOUT N I

-800 MZ-800 1 , MZ-1E20 LAYOUT • JOY STICK LAYOUT • o , , , , --• • N1063R JOY2L-__ _ JOY, 9 10 " 12 • , c o E • F o • G L-__ _ H -4 8

1 2 Power Supply Circuit SDI AC 240V 49 SWI o o • FI T~OOmA ~CI II A. LI L.l..l ZOOS I • 3 01 RB1~1 or 1 J 481 4 ., 10/2W C3 .' Lh.".I. ..

MZ800 rn CPU Unit Exteriors NO. PARTS CODE PRICE NEW PART DESCRIPTION RANK MARK RANK 1 CCOVH1002ACZB AQ 0 I/O Cover unit 2 OUNTG1412ACZZ AX 0 Botto

MZ800 rn CPU Unit Exteriors -2-

MZ800 [lJ I/O Cabinet Unit NO. PARTS CODE PRICE NEW PART DESCRIPTION RANK MARK RANK 1 C CAB B 1 0 1 8 A C Z B AS D I/O Cabinet unit 2 GFTARI0

MZ800 [l] CPU Board Unit NO. PARTS CODE PRICE NEW PART DESCRIPTION RANK MARK RANK 1 LBSHZ2029SCZZ AB C Bushing 2 QCNCM1009ACZB AA C Connector (2pin)

[!] Key Board Unit NO. PARTS CODE PRICE NEW PART RANK MARK RANK 1 OCFD5799D//// AF C Space key 2 OCF3362A///// AB C Crank guide F 3 OCF3363A///// AD

MZ800 [[] Power Supply Unit NO. PARTS CODE PRICE NEW PART DESCRIPTION RANK MARK RANK 1 pco VS 0181 V A Z Z AG C Case (B) 2 P CO VS 0215 P A Z Z AF

MZ800 [[] Power Supply Unit 1 54 53 47 ' 13 , -

CJ1 -~ Option 16 KB RESET GDG VRAM ADR. BUS '17.73 MHz VRAM DATA BUS I-00 ~~~ t -u RGBI 0" u., ~ I ~CustomlC OSC 556 Monitor, J I --ffi] 1

MZ800 [§J Packing Parts NO. 1 2 3 4 5 6 7 8 9 la 11 12 13 14 15 16 17 f--18 f--19 20 21 22 -.-~ ---13 PARTS CODE QACCZ3321QCN1 QACCE3620QCZZ QCNW-106

MZ800 rn Cassette Unit Exteriors NO. PARTS CODE PRICE NEW PART DESCRIPTION RANK MARK RANK 1 o B V 0 7 5 7 1 7 0 043 AA N D Tape mirror --2 o

MZ800 [ID Mechanism Unit (For Cassette) NO. PARTS CODE PRICE NEW PART DESCRIPTION RANK MARK RANK I OBV0210680007 AN N B Record -:j:llay back head

[ID Mechanism Unit (For Cassette) i~; _______ : ~ 67 ~_35 ~~,----17 , 62 , r-56 ~~~--i---1+!--~~-~-'~j , 2:~~" 2~ , 49 ck ~ ~ 51 40----, 6

MZ800 [9J PWB Unit (For Cassette) NO. PARTS CODE PRICE NEW PART DESCRIPTION RANK MARK RANK 1 o B V 0 3 6 4 1 8 0 0 0 2 AH B Slide SW [SWl-

[IQ] MZ -1 P 16 Exterio rs NO. PARTS C.ODE PRICE NEW PART DESCRIPTION RANK MARK RANK 33 XBPSM30P08KOO AA C Screw 34 QC NW-Ill 0 A C Z Z AE N C Conn

MZ800 [ll] MZ-IPI6 Main PWB Unit NO. PARTS CODE PRICE NEW PART DESCRIPTION RANK MARK RANK 1 QCNCMI009ACZD AB C Connector (4pin) 2 QCNCMIOl5ACZZ AC

MZ800 [l2J MZ-l P16 Packing Parts ,3 ,5 [l MZ-l E20 NO, PARTS CODE PRICE NEW PART DESCRIPTION RANK MARK RANK 1 LANGT1080ACZZ AK N C PWB angle 2 SPAK

MZ800 • Index PARTS CODE NO. PRICE NEW PART RANK MARK RANK PARTS CODE NO. PRICE NEW PART RANK MARK RANK (C 1 QCNCM1038ACZZ 3-8 AM C CCABBI006ACZA 10-

MZ800 PARTS CODE NO. PRICE NEW PART RANK MARK RANK PARTS CODE NO. PRICE NEW PART RANK MARK RANK TLABZ1010ACZZ 6-7 AD 0 V R 0-5 C 2E F 1 8 0 J 5-23 AA

4-1. Memory map The MZ-800 has a different memory map depending on o MZ-800 memory map FFFF" EOOO 0000 COOO AOOO 01000 --4000 2000 1000 MAIN o-RA

MZ800 PARTS CODE NO. PRICE NEW PART RANK MARK RANK PARTS CODE NO. PRICE NEW PART RANK MARK RANK OBV0632070008 8-15 AA N C OBV9349010161 9-31 AD N C OB

MZ-800 11-2BB03~4 • 71931-105 Sl MMl800 ------------------------------203 -2508871720007000 R 1 PORATION SHARP COR ndustrial Instrument Group I . Con

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

MZ-800 ~rt OUT (SE5) OUT (SEe) IN (SEO) IN (SE1) 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