HP-25C Eumulator

[Harald]

(10-22-2014 12:03 PM)Chris Chung Wrote:  Do you mean the power slide switch? Does it look physically damage (due to shipping) or just did not close properly when slide into position (part quality) ? I usually order parts that are easy to get and they may not be the highest quality.

Yes, the slide switch is physically broken. The plastic part has cracked, possibly because pressure was applied during shipping. - But not to worry, I have already replaced it with another switch. I just thought I'd mention it so you can place some extra padding over the switch when shipping. Others might not have a replacement switch at hand.

(10-22-2014 12:03 PM)Chris Chung Wrote:  Yes, you can setup a "default" rom + speed via menu. I had updated the README at my github repository w/ these simple operation guide

press-n-hold 1st row, 5th column (from top) for hp33C
press-n-hold 2nd row, 5th column for hp25C
press-n-hold 3nd row, 5th column for hp21
press-n-hold 4th row, 4th column for version info
press-n-hold 1st row, 4th column to show greetings
press-n-hold 1st row, 3rd column to edit greetings, use 0-9 to enter numbers and letters, Run/Stop to advance digit, Cls to abandon entry
press-n-hold Pgm/Run toggle button to edit default startup settings, use 'F' key to select rom, 'G' key to select speed, Pgm/Run will save setting and exit setup

The setup mode, i.e. RPM/RUN + switch on, also tests the tactile buttons, it shows an internal scan code at the last 2 digits. Handy when you are building your own or checking the H/W.

The "edit greetings" mode, pressing numerics consecutively (like old phones) will give you alphabets.

Thanks for the instructions, works as advertised! I'll try and work through my collection of programs as soon as possible. Already dug out my real 25c for comparison

And thanks again for your effort!