Well I got all excited when my Parallax P2 EDGE cpu and breakout board arrived! So I waited until I had a whole afternoon to settle down and play.
First I had to make a prop-plug replacement. So I used a usb ft232 serial interface and added a .01 capacitor to DTR connected to a 10k pulldown resistor connected to the base of an npn transistor the collector of which went to the reset on the EDGE. So just the tx, rx, rst and grd. Checked it out separately and got a nice reset pulse when I disconnected terra-term, and tx and rx were correct way around and ground was where it should be.
So far so good.
Having seen the video with Ken cutting the two ground connectors on the EDGE I did the same, knowing if it were possible to do damage by putting the EDGE in its slot the wrong way, then sooner or later it would surely happen!
How to test it?
I read the easiest way to see if there was life was to power up and hit '>' followed by space and then escape while connected to a serial monitor like terra-term and TAQOZ would respond. So that's what I did.
Don't panic- try again.
Run video watching Ken demoing the board.
There are four dip switches labelled, led, flash, up arrow and down arrow. The led and flash were set to 'on' and the up and down arrow off. Compared that to Kens board in the demo- the same.
It seemed to me the moment Ken switched the power on that the two leds lit up on the EDGE card, and shortly after the lcd screen displayed its spiral. The led's are labelled P56 and P57 but I don't know whether they should light at this stage or it was part of Kens demo software.
So I looked for a circuit diagram but it seems its not yet been released.
Now I'm beginning to think my track cutting did some damage! and I DO panic!
I checked on the card and 5v and 0v are definitely on the EDGE cpu card. After being switched on for a while the card was still stone cold.
Also when I switched the power off using the EDGE breakout board switch, the power led by the switch stayed on for three or four seconds. It seemed to me on the video the led went off instantly for Ken.
So- after that sorry tale- does anybody have any suggestions what to try now?
Dave (feeling very sorry for himself)