What is MTK-85?

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User's Manual

Schematic

Ordering Info

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8085 Microprocessor Articles

Experimenting the MTK-85 with Micro-C

Intel 8085 Wiki

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The MTK-85 is a low-cost single board computer designed for self-learning the 8085 Microprocessor. The kit enables studying from low level programming with direct machine code entering to high level programming with PC tools easily. A nice feature, single-step running, helps students learn the operation of microprocessor instructions quickly and clearly. The user registers provide simple means to verify the code execution. Using a PC as the terminal, the MTK-85 can receive the Intel hex file and disassemble the machine code into 8085 instructions. The MTK-85 is professional design that combines classic microprocessor, peripheral chips with modern IC technology; Programmable Logic Device decoder, brownout reset, and text LCD.

Block Diagram of the 8085 Microprocessor Training Kit

Hardware Features:

• CPU: CMOS 80C85 4MHz
• Memory: 32kB Monitor ROM and 32kB SRAM
• Simple I/O Port: 8-bit GPIO built with 74LS175 D-type F-F and 74LS126 Tri-state buffer
• Programmable Ports: two 8255 chips, system and user ports
  
• Programmable Counter: 8254
  
• UART: Classic NS8250 compatible UART
• onboard I/O devices:
  
• 6-digit seven segment LED,
  
• 28-keypad,
  
• 4-bit dot LED indicates status of GPIO,
  
• buzzer,
  
• text LCD with CPU bus interface with standard controller HD44780,
  
  
  
• Serial Interface: 9600 RS232C
• +5V Power Supply: Low-dropout voltage regulator with input protection
  
• 40-pin header for CPU bus
  
• 40-pin header for user port, 8255 and 8254
  
• 16-pin header for simple GPIO port
  
• onboard logic probe power supply
  
  
  
• Test button for single pulse generation to the interrupt pins
  
• Brownout Protection
  
• No jumper settings

Software Features:

• Enter the machine code in hexadecimal
  
• Single-Step execution
  
• Examine and modify user registers
  
• Run user code with software breakpoint
  
• Built-in LCD drivers
  
• Download Intel Hex file
  
• Disassemble machine code into 8085 instructions
  
• Display user registers and disassemble the instruction after single-stepping
• NVRAM Bootable: runs user program when power up.

Learn more features and how easy using the board here in User's Manual.

Ordering Information

More Information and quote please contact: Wichit Sirichote


Download:

Intel Hex file monitor program and PLD's JEDEC file
Complete Hardware Schematic

8085 Microprocessor Online Articles Technical notes of MTK-85 board and sample code.

Hardware Schematic