The bus of the early single-board devices, such as the Z, was universally a Von Neumann architecture. The development board exists to showcase or train on some particular processor family and, therefore, internal implementation is more important than external function. Compared to a microprocessor development board, a microcontroller board would emphasize digital and analog control interconnections to some controlled system, whereas a development board might by have only a few or no discrete or analog input/output devices. I/O processing might have been carried out by a single chip such as the 8255, but frequently required several more chips.Ī single-board microcontroller differs from a single-board computer in that it lacks the general-purpose user interface and mass storage interfaces that a more general-purpose computer would have. RAM and EPROM were separate, often requiring memory management or refresh circuitry for dynamic memory. Processors of this era required a number of support chips to be included outside of the processor.
MICROCONTROLLER 6502 EMULATOR SOFTWARE
Software development for this system was hosted on Intel's Intellec MDS microcomputer development system this provided assembler and PL/M support, and permitted in-circuit emulation for debugging. The board also offered expansion through a bus connector, but could be used without an expansion card cage when applications did not require additional hardware. In March 1976, Intel announced a single-board computer product that integrated all of the support components required for their 8080 microprocessor, along with 1 kilobyte of RAM, 4 kilobytes of user-programmable ROM, and 48 lines of parallel digital I/O with line drivers. Single-board microcontrollers appeared in the late 1970s, when the appearance of early microprocessors, such as the 6502 and the Z80, made it practical to build an entire controller on a single board, as well as affordable to dedicate a computer to a relatively minor task. They are also a popular means for developers to gain hands-on experience with a new processor family. ContentsĪs they are usually low-cost, and have an especially low capital cost for development, single-board microcontrollers have long been popular in education. The intention is that the board is immediately useful to an application developer, without requiring them to spend time and effort to develop controller hardware.
This board provides all of the circuitry necessary for a useful control task: a microprocessor, I/O circuits, a clock generator, RAM, stored program memory and any necessary support ICs. The Make Controller Kit with an Atmel AT91SAM7X256 ( ARM) microcontroller.Ī single-board microcontroller is a microcontroller built onto a single printed circuit board.
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