What is it ?
A rugged Z80 based Embedded Computer good for
Learning Programming in C, Assembly, …
Education - Basics of Computer Engineering and Maintenance
Embedded Engineering, Control & Measurement
The system maybe used standalone or RS232 / USB hosted via a PC.
System Overview:
Features:
Off-the-Shelf Components
no SMD
moderate clocks (below 10 MHz)
all ICs on sockets
runs with MS-Windows, Linux, UNIX, Solaris …
easy to repair
easy signal access
built in I²C protocol for I²C periphery
built in Operating System, Boot-Loader and Memory Monitor
up to 60 kByte SRAM / up to 36kByte FLASH-EEPROM
supports USB via RS232-USB-Adapter
Programmable in Assembly, C, ….
View at Board MAIN:
Mainboard Overview:
View at Board MMU:
MMU Overview:
Terminal Screenshot:
Bus Monitor and Cycle Stepper:
It allows stepping through your machine code step by step.
shows Address / Data via 7-Segment displays
indicates pulses of CPU control signals via LEDs
translates 5V CPU signals to 3,3V periphery signals (Level-Shifter)
on board PIO-Mode, CPU-Free-Run Mode, …
Fully programmable via Xilinx ISE
Schematics and Assembly Drawings
Display Readout on System Reset and somewhere inside the program (red Address, green Data) :
Availability:
A) fully assembled as shown on the photo above
B) just the bare naked boards MAIN and MMU
Documentation:
Schematics and Assembly Drawings
Software & Tools:
Firmware Version 9.3 (supports W29C020 FLASH EEPROM)
Firmware Version 9.4 (supports AM29F040 FLASH EEPROM)
Linux Tools: Bash Shell Scripts, Assembler, HEX2BIN-converter
Kermit Scripts:
HOWTOs:
HOWTO Program The Z80 Periphery (CTC, SIO, PIO)
The X/Y-Modem Protocol Reference by Chuck Forsberg
The Z80 Family Program Interrupt Structure (rewritten)
More Z80 stuff:
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