Running a program (RUN, SLOW, STEP)Running a program is different depending on the previous Operational Mode.
If the RUN (or SLOW or STEP) button is pressed while the computer is in PROGRAMMING mode, then the initial address is the one entered in the ENTRY switches. To run a program this way the operator needs to enter the initial address with the switches, press the ADDR button, then to press the RUN (or SLOW or STEP) button to initiate execution.
If the RUN (or SLOW or STEP) button is pressed while the computer is in HALT condition, then the initial address is that contained in the Program Counter register (PC). To run a program this way, the engineer loads the initial address into PC, then presses the RUN (or SLOW or STEP) button to initiate execution.
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Homebuilt CPUs WebRing
JavaScript by Qirien Dhaela
Join the ring?
David Brooks, the designer of the Simplex-III homebrew computer, has founded the Homebuilt CPUs Web Ring. To join, drop David a line, mentioning your page's URL. He will then add it to the list.
You will need to copy this code fragment into your page.
Project start date: May 13 of 2009
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