In a non standard case with main-voltage connection and converter to a Direct Current of 5V, a so called wire-wrap board with the dimensions 12 to15 cm was enclosed. On that board Integrated-Circuits (IC's) connectors with wire-wrap posts were mounted. Also for the SC//MP processor a 40 pins wire-wrap IC-connector was used. The wire-wrap connection was manually made or by an electric battery-tool. The massive copper-wire with insulation was stripped for about 1.5 to two cm's and wrapped around a square post of a connector or a post mounted on the board. The then realized connection was a gas-tight one. Till now all connections are not interrupted.
Also on the wire-wrap board, Random Access Memory (RAM) was mounted in IC-connectors. Two circuits of 256 words to four bits each are available for the user program(s). A Read Only Memory (ROM) of 3 circuits with each 32 words to 8 bits each, was burned in with the "Operating System" (OS), a program to control the microcomputer. The memory was expensive and caused the now so feared y2000 problems.
Control electronics for as well the microcomputer itself as the memories, but also for the input- and output-circuitry is mounted on the single wire-wrap board.
The data-input (8-bits parallel) for the microcomputer takes place in the simplest way by eight (8) switches and a Load-Data push-button on front-panel of the microcomputer. (see layout of the service-panel). The output to inform the user is done by means of eight (8) Light-Emitting Diodes (LED's) on the panel.
The execution of a user program by the microprocessor-system can be affected by switches on the panel.
Layout of the service-panel
Layout of the Service-panel
(full size 10KB)
