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Related Manuals for Dick Smith System 80
Summary of Contents for Dick Smith System 80
- Page 1 U/ER'Z m flflUflL...
- Page 3 It helps you to set up the system and to operate it efficiently. An overview o f the System 80 is provided so that you w ill find no d ifficulty in understanding and expanding your system. Moreover, higher level com puter users w ill find the technical information in the A P P E N D IX very useful.
- Page 4 C O N TEN TS '** TABLE OF C O flTEnir Introduction ....Power On Preparation . . Video Display form at . . . Keyboard and Cassette . . Program lo a d in g ....Program Saving....Second Cassette Recorder System R e s e t....
- Page 5 IflTRODUCTIOn The design philosophy o f the System 80 is like that o f most other general purpose computer systems, and has great expansion capability. The main unit (E G 3003/4) contains a Central Processing Unit, I/O devices and a mass storage device. These are the Z 80 CPU, a keyboard, a video interface and a resident cassette recorder.
- Page 6 Beside the hardware configuration described, the System 80 has a powerful resident E X T E N D E D BASIC Interpreter which is compatible w ith th at o f TRS-80 Level II BASIC. optional S-100 expansion designed connected the main unit.
- Page 7 64 characters/line. Turn on the power o f the display unit first, then the System 80. A message 'R E A D Y ?' will be displayed on the top left corner o f the display.
- Page 8 FO R M A T S E LE C TIO N VIDEO Dl/PLAV The System 80 allows two kinds of display formats, that is, (1). 64 characters FORmflT per line; (2) 32 characters per line. The purpose of the latter is to permit an enlarged and clear character display when a television set is used.
- Page 9 KEYBOARD & The keyboard acts as a man-machine interface, while the cassette is used for mass storage o f programs and data. CA//ETTE Special Function Keys PAGE — select page for display (refer to previous section). FI — isolate the cassette from the control o f the computer during winding and rewind ing and allow manual cassette motor control.
- Page 10 Programs are stored on the cassette tapes in the form o f magnetic signals. If the user PROGRAIT wants his Computer to do a certain job, he should w rite the program, save it onto a cassette tape and then reload the program into the system at any tim e he wants. He may also buy L O A D in G any TR S80 Level II Basic compatible tapes from the computer market, then load and run them.
- Page 11 Checking a Program Read the CLO A D command (section 1.5 in the BASIC Manual.) Rewind the cassette tape to the starting point of the program. Press the P L A Y button on the cassette drive. d) Type in the command CLOAD? from the keyboard. Hit the NEW LIN E key.
- Page 12 Program checking is provided in the System 80. Please read section 5.3, "C H E C K IN G A PR O G R A M ". PLAY...
- Page 13 /Econo T w o cassette recorders are required in some applications such as payroll and account ing. In these applications, old data have to be read into the computer sequentially from one CA//ETTE file and output to another file after processing or updating. The main unit already has the RECORDER interface for one more cassette recorder.
- Page 14 /Y/TEfTl RE/ET The system must, in some cases be reset. When, fo r example, the machine is running in a dead loop. The Reset Switch is located at the right side o f the back panel. Pressing the reset switch causes the computer to return to the 'R E A D Y ' mode w ithout changing the memory contents.
- Page 15 C l I ELECTRICAL CHARACTERISTICS APPEflDIK A ™ « “ * ■ > TECHdlCAL POWER CO NSUM PTIO N /PECIFICflTIOfl/ CASSETTE IN P U T L E V E L V peak to peak CO M PUTER O U T P U T R EC O R D IN G LE V E L 0.3 V peak to peak REM OTE S W ITC H IN G C A P A C ITY 0.5 A max at 6 V DC...
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Page 16: Pin Connections For Expansion Interface
PIN CONNECTIONS FOR EXPANSION INTERFACE SIGNAL DESCRIPTION SIGNAL DESCRIPTION G N D G R O U N D A 10 G ND G R O U N D A 13 1.79 M Hz clock P IN T IN T E R R U P T NO C O N N EC TIO N NO C O N N EC TIO N PH LD A... -
Page 17: Memory Map
MEMORY MAP APPERDIH B FFFF m E m o R V m flp & i/o m op FOR EXPA N SIO N 7 F F F 16K RAM V ID E O D IS P L A Y M E M O R Y 3C 00-3FFF R ESER VED FOR K E Y B O A R D 3 8 0 0 3 7 FF... - Page 18 DECIMAL CHARACTER APPEflDIH C DECIMAL CHARACTER CR (A U T O LF) fl/CII TABLE SPACE — & « • • > < >...
- Page 19 M A N U A L (A ttach to S ystem 8 0 user's m a n u a l) Introduction T h is enhanced version of S ystem 8 0 . An 1.5K ROM is added to provide new keyboard and display functions, statement renumber command, and a machine language m onitor.
- Page 20 PRINT function is activated, both alphanumeric and graphic characters on the screen Will transfer to the printer. Only thctee printers that can recognise System 80 or TRS-80 graphic characters are able to p rin t the graphics. Otherwise, only alphanumeric characters can be printed.
- Page 21 Machine Language Monitor The machine language m onitor allows you to enter, m odify, display and execute (w ith breakpoints) Z80 machine code which is displayed and entered in hexadecimal form at. To enter the m onitor, type SYSTEM iNEWLINEl and then / 12710 [N B /V U N ^l The machine w ill then show the current status o f the CPU registers.
- Page 22 5. G Start execution The G command starts execution of a program. Command form at is G nnn,xxxx IN E W LIN B where nnnn is the start address and xxxx is the breakpoint address, e.g. G0000 w ill boot up the machine. G8000, 81AB the machine start execution from address 8000 and return to the m onitor when it runs to the address 81 AB.
- Page 23 VOLUME ADJUSTMENT FOR IMPRCNEMENT OF CASSETTE LOADING In order to rectify the cassette loading problem caused by differences in output level and quality o f different cassette tapes, your system now has a volume and a level meter added on the cassette recorder. The volume adjustment procedure is: —...
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