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The Computer includes a 2MHz 8085 CPU, 2K of ROM, 1K of RAM, 26 key keypad, 6 digit LED display, an 8 bit latched output port with individual LEDs on each line and an 8 bit input port with slide switches for each line. Those features are common to most microprocessor trainers but HP went further and provided clearly defined and marked address and data bus lines, each with it's own tiny LED. The six status lines also where clearly marked and labeled and they also had tiny LEDs on each line. This made it easy for the trainee to see exactly what was happening in the computer without having to connect a logic probe to each point. But even that was not enough for the engineers at HP, they also added switches and 12 removable links to allow the user to induce faults in the computer for troubleshooting practice. * Postal international money orders sent from the USA that are pink in color. * Please do not send Personal Checks. They can take over a month to clear. (please look at our rules and privacy policy) |
Mhutchinson@machine--tools.com (Madelyn Hutchinson) for additional information. This email is used for forwarding to newsgroup user.
