BOTGA Hardware Collection

The LLL MST-80 is a complete microcomputer system self-contained in a
briefcase for portability and easy usage. The microcomputer was designed as a
training device for LLL1s Technology Training Program (TTP), allowing students
to explore the hardware and software capability of a typical microcomputer.

The trainer uses the Intel 8080A Microprocessor and supporting integrated
circuits. It has its own set of solid-state memory elements so no external
memory is required. Both random-access read-write memory (RAM) and
programable read-only memory (PROM) are provided. The MST-80B has a 24-key
keyboard and a 3-digit numerical display for the student to communicate with
the microcomputer. This input/output (I/O) combination eliminates the need
for expensive and bulky 1/0 such as a teletypewriter. The keyboard and
numerical display can be used with either the octal (base 8) number system or
the hexadecimal (base 16) number system. Either number system can be selected
by simply depressing a control key.
The trainer includes a breadboard socket so that experiments can be interfaced
to the microcomputer through an 8-bit input port and an 8-bit output port.
This allows the student to learn hardware interfacing techniques as well as
software programming
.
The MST-80B a1 so has ten uncommitted light emitting
diodes (LEDs) that can easily be connected to display the state of any desired
signals (address lines, data lines, and status). These can be used when
operating the trainer in the single-step mode or the normal operating mode.