Reprinted from Intelligent Machines Journal November 21, 1979, page 23

Reprogrammable Development Emulator for Intel's 8022

Intel Corporation's EM2 Emulator Board, a new tool for developing single-chip microcomputer applicatoins, emulates the 8022 microcomputer, the first general-purpose microcomputer with on-chip analog-to-digital conversion. The board converts the ROM-based 8022 into a functionally and electronically equivealent EPROM-based version that has readily accessible internal functions. As a result, the user can correct errors by checking internal operations, and then reprogramming the EPROM.

photo of EM2

The board measures 2.75 by 4.25 inches, plugs directly into a standard 40-pin microcomputer socket, and requires no interfacing, cabling, or special power supply, according to the company.

As is the case with the 8022 single-chip microcomputer, the EM2 emulator board provides a two-channel analog-to-digital converter that can be used with an 8-bit I/O to process multiple analog signals. It also provides 2K bytes of program storage, and 64 bytes of data memory.

Accessible and Programmable

Intel believes that the EM2 Emulator Board removes the obstacles that conventional services present to users during software development and prototype debugging. It makes the on-chip functions accessible, and can be programmed with the same methods, equipment, and codes used to develop 8022 programs.

The 8022E is a special version of the 8022. Its internal system bus is brought out to 24 additional package pins, whcih are connected to the 8755A. The 8022E is packaged in the new 64-pin QUIP (quad in-line package) instead of in the 8022's standard 40-pin DIP (dual in-line package).

A designer cannot ordinarily access on-chip functions, since the internal system bus is inside the chip. However, the EM2 user can access them by connecting appropriate instruments to the corresponding package pins. For example, the user can detect and analyze instruction execution sequences, and can monitor I/O ports by looking at the 8755A pins.

From a programming standpoint, the EM2 board is identical to the 8022. Software can be developed with the MCS-48™ Assembler on an Intellec® Microcomputer Development System. Programs can be stored in the 8755A with the Intellec Development System's Universal PROM Programmer, or with a PROMPT-48™ or PROMPT-80/85™ microcomputer design aid.

Functionally and Electrically Equivalent

The 8022E microcomputer has the same capabilities and features as the 8022 production version; its A/D converter, time-counter, central processor, I/O, data memory, and program memory addressing are identical. The only difference is that the program instructions reside in the 8755A's 2K bytes of EPROM until the program is finalized. Then, exactly the same program code is used by Intel to prepare the production masks that store the program in the 8022 microcomputer's ROM memory.

The board's plug has the same pin configuration as the 40-pin 8022. When plugged into the user's socket, it draws a maximum of 300 mA from the user's +5-volt power supply.

The EM2 emulator board costs $500 in single-unit quantity. (The 8022E is not available as a separate component, only as part of the EM2 emulator board package.)

Contact Intel Corporation, 3065 Bowers Avenue, Santa Clara, CA 95051; (408) 987-8080.

Valid XHTML 1.0 Strict