5160Re: [cosmacelf] Re: Is there a Hex Keypad standard?
- Feb 2, 2007Right you are. The Netronics hex keyboard had no way of telling you
when a digit was pressed unless it happened to be different than the
last two key presses. The VIP's keyboard was much handier in this
regard; as I recall, it was a scanned keyboard that signaled when a
key was pressed. An advantage to the scheme was that you could also
tell when multiple keys were pressed. (Disclaimer: I'm not real
familiar with the VIP, so my memory could be a bit off. I can look it
up later if you're interested, though.)
On Feb 2, 2007, at 10:10 AM, ted_rossin wrote:
> From what I can see from the schematic there is no auto load feature
> like I built. So you have to key in two hex digits, then hit the
> INPUT switch in order to load a value. Also, the keypad strobe does
> not seem to be hooked up to any of the external flag lines.
> How do people use this keypad under program control? I use the
> keypad as arrow keys for a memory editor and screen grahics editor
> but fail to see how this could be done with a "standard" setup as it
> looks like I would be forced to change the code to work in an ugly
> way. For example, to move the cursor up, press the 8 key, then hit
> the INPUT key. Yuck.
> So, the bottom line is that my hex kepad is a superset of the
> standard in that I can sense when a key is pressed via the /EF3 line
> and I have an auto-load feature that saves a key press. The other
> bummer is that the keys on the Quest and Netronics boards are not
> organized the same way as my keypad which is set up like a modern PC
> keyboard so using 2,4,6 and 8 for arrow keys will be very confusing
> for others.
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