HP-01 available

[PANAMATIK]

The HP-01 ROM microcode is running now on the "new HP-01" prototype PCB, after having spent a lot of debugging hours since yesterday.

1.) Time and date and alarm time ad stopwatch can be read, written and displayed as known from the original watch.
2.) The calculator functions + - * / are working.
3.) Any other functions and key sequences described in the manual are behaving well. I think I tried them all.
4.) The buzzer rings when alarm time matches actual time, waking the processor from sleep mode. I tuned the buzzer sound with an original HP-01.
5.) Dynamic calculations are performed when the stopwatch is running.
6.) Percent function is working well. This function was missing completely in the published HP-01 prototype code from the 1977 US patent.
7.) I managed also to run the stopwatch in deep sleep mode. Although the RTC chip doesn't contain a stopwatch, nevertheless it supports the stopwatch by generating a precise 1024 Hz signal, which increments a counter in the sleeping PIC processor. You can run the stopwatch for hours and days without consuming battery power.

I will finish the new layout for the release version PCB this weekend and give it into production on tuesday.

Next week I will release two interesting products, which are closely related to the HP-01. Wait for a surprise.

Bernhard