MEK6800D2

Short description: Development board for Motorola 6800 microprocessor

A Motorola MEK6800D2 Microcomputer, circa 1976. This microcomputer is based on a Motorola MC6800 8-bit microprocessor. The board on the left is the Microcomputer module containing the 6800 microprocessor, along with memory and I/O devices. The board on the right is the Keyboard/Display module containing a hexadecimal keypad, function keys, and 7-segment LED displays for displaying a 16-bit address and 8-bit data.

The MEK6800D2 was a development board for the Motorola 6800 microprocessor, produced by Motorola in 1976. It featured a keyboard with hexadecimal keys and an LED display, but also featured an RS-232 asynchronous serial interface for a Teletype or other terminal. Data and programs could be loaded from and saved to an audio cassette tape. There was an on-board monitor program called JBUG (analogous to an operating system on a modern computer) fitted in a 1K byte ROM, and the maximum RAM capacity on board was 512 bytes, but this could be expanded via the Motorola EXORciser computer bus interface.[1]

The hardware consisted of two circuit boards. The keyboard-display module contained a 16 key (hexadecimal) data entry section, and eight function keys labeled M, E, R, G, V, N, L, and Pl along with a 6 hex digit LED display. The keyboard-display board connected to the microcomputer module by a 50-conductor ribbon cable.[2]

There was also a parallel bus interface for general purpose I/O.

Another popular monitor program for this system is called MIKBUG.

## Contents

* 1 References
* 2 Bibliography
* 3 See also
* 4 External links

## References

1. ↑ http://www.vintagecomputer.net/motorola/mek6800d2/ Vintage Computer Photos subject: motorola mek6800d2] vintagecomputer.net
2. ↑ Perdue, Terry (January 1978). "Micro Maestro: A musical review of Motorola's MEK6800D2". Kilobaud (13): 94–96. ark:/13960/t25b1f93k. http://www.vintagecomputer.net/motorola/mek6800d2/Kilobaud_Jan_1978_MEK6800D2_Music.pdf. Retrieved 23 September 2019. Alt URL

## Bibliography

* Leventhal, Lance A. Microcomputer experimentation with the Motorola MEK6800D2. Prentice-Hall, ISBN 0-13-580761-1

## See also

* Microprocessor development boards
* For a clone of the D2 kit see following website (6802 MAXC D2 Board).

## External links

* MEK6800D2 complete manual

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