Last updated:
15. Aug 2002 11:23

 

Gallery

 

PROJECT No 5

On these pages I'm about to present my 1995er development called Project No. 5.
It's a Z80-CPU-based portable microcomputer with a regular laptop-keyboard and a Dot-Matrix-LCDisplay.
 

Click to ENLARGE!
CLICK ME!

 

 Click to ENLARGE!
CLICK TO ENLARGE
PLACE THE MOUSE POINTER OVER A COMPONENT
AND CHECK THE STATUS BAR FOR MORE INFORMATION

 


HARDWARE


MAIN BOARD
  • Z80-CPU (6MHz), CMOS version;
  • 128KB static RAM for user data, text, data acquisition requirements;
  • 32KB System-RAM (type HM 62256),
  • 256 KB Data-EPROM contains all graphics and sound data (type 27C2001);
  • 64 KB BIOS EPROM (type 27C512);
DAUGHTER BOARD
  • 82C55 PIO (8255 CMOS),
  • 82C53 Timer (8253 CMOS),
  • AD7569 8bit AD/DA-Converter,
  • MAX232,
  • LM24014-Dot-Matrix-LCDisplay 240x64 pixel,
  • M6242-Amiga-realtime clock,
  • Battery-Backup-Logic,
  • 2N137-Optocoupler (serial interface),
  • LM386-NF-amplifier,
  • LM2940 power supply


SOFTWARE


An assembler-written BIOS  (approx. 16KB):
  • LCD-Display-Handler,
  • XT-Keyboard-Handler,
  • Console-Handler (Input/Output-functions),
  • UniCom-Handler (serial data transmission),
  • Sound-Handler (8bit / up to 22kHz-playback),
  • real time clock,
  • Graphics-Engine (Plot, Draw, Circle, Bitmap-Handling, 8-to-6bit-converter)
Implemented applications:
  • text-Editor (300 Bytes Z80-Code!),
  • database,
  • calendar,
  • programmable alarm clock,
  • alarm management (date, time, weekday, sound sample and duration adjustable),
  • stopwatch,
  • biorhythms calculation,
  • real time measuring system (e.g. weather data),
  • diagrams (e.g. battery-charge/discharge graphs),
  • game

   project_no5.jpg (90859 Byte)
CLICK ME !

 

RELATED DOCUMENTATION
Main Board schematics pdf-file (76 kB)
Daughter-Board schematics pdf-file (81 kB)
Main Board schematics postscript, zip-file (196 kB)
Daughter Board schematics postscript, zip-file (307 kB)
Flow diagram GIF picture (60 kB)
Parts list txt-file
I/O ports txt-file
Bios functions outline txt-file
Z80 OPcodes outline txt-file
 

 

DATASHEETS
Z80-CPU datasheet pdf-file
82C55 datasheet pdf-file
82C53 datasheet pdf-file
27512 datasheet pdf-file
27C2001 datasheet pdf-file
LM386 datasheet pdf-file
AD7569 datasheet pdf-file
MAX232 datasheet pdf-file
 

 

SOFTWARE
AS80 (MS-DOS) Z80-Cross-Assembler, zipped (60kB)
AS80.doc file txt-file (29 kB)

 

Download here Acrobat Reader

 

 

(c) 1992, 95 Andreas Schwertner
All rights reserved.