Signetics Instructor 50
The Instructor was a small system designed to teach the use and programming of the Signetics 2650 CPU. But it was also a real microcomputer with a tape interface to save and load programs, and an S-100 compatible expansion bus.
Signetics Instructor 50
The Instructor was a small system designed to teach the use and programming of the Signetics 2650 CPU. But it was also a real microcomputer with a tape interface to save and load programs, and an S-100 compatible expansion bus.
The actual to a second generation of training computers: in the form of a raw electronic board, but offered a real plastic case, S-100 bus, tape interface.
The built-in display was only an eight-digit, seven-segment LED display. Where, when turned on, “HELLO” will be displayed. The keyboard is made of a hexadecimal keyboard (16 keys) and a function keyboard (12 keys). Interaction takes place through 8 parallel / O switches and also finds their LEDs.
The planning was of course done in hexadecimal via a simplistic assembler.
The 2 KB ROM was used to store the monitor. RAM was 640 bytes, but 128 bytes were used by the monitor, resulting in 512 bytes left for programming. But with 14 address lines, the 2650 CPU could address 32K bytes!
