Problem with my board (my fault)

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Problem with my board (my fault)

Postby jplerouzic » Apr Sun 06, 2008 4:25 am

Hi all,

Thanks Vince for this bright idea to recreate the KIM. Now here is my problem:

- I made a mistake when soldering the 74145 which is used for address decoding, and I had to repair some spoiled copper lines with external wires. (I definitively should understand that I am 30 more years old and soldering is no more for me ;-) )
As you may guess the microKim once powered up didn't lit the display.
- After another round of testing with an electrical controller (I have no scope) I found that I spoiled also a soldering point related to IRQ. After also repairing this error, the microKim still does not lit the display.
- I also noticed that in my components bag there are left a LED and a resistor that have no place on the board (I saw that some boards have a LED, but not mine).
- I want to do my best with this board before buying another one.

Please what could you suggest me to do?

Jean-Pierre
Last edited by jplerouzic on Apr Tue 08, 2008 1:40 pm, edited 1 time in total.
jplerouzic
 

Postby vbriel » Apr Sun 06, 2008 5:37 am

Jean-Pierre,

At the bottom of your board is a revision #, what does yours say? Rev 0 or Rev 1?

Vince
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Postby jplerouzic » Apr Sun 06, 2008 6:40 am

Thanks for the answer,

It's a revision #0 board.
jplerouzic
 

Postby jplerouzic » Apr Tue 08, 2008 1:38 pm

Hi again,

Good news: The MicroKim works!
The problem was that another soldering point around the 74145 was wrong.
I should definitively forget any hope to do soldering myself again!
My next step is to build the 32kb memory which unfortunately involves soldering again.

Thanks for all,

Jean-Pierre
jplerouzic
 

Postby vbriel » Apr Tue 08, 2008 4:04 pm

jplerouzic wrote:Hi again,

Good news: The MicroKim works!
The problem was that another soldering point around the 74145 was wrong.
I should definitively forget any hope to do soldering myself again!
My next step is to build the 32kb memory which unfortunately involves soldering again.

Thanks for all,

Jean-Pierre


Glad to hear. You received the led and the resistor because your kit was shipped around the time when the rev 1 boards came out. I added a LED for the rev 1 just because when you are using the serial port mode, you can not tell that it is turned on.

Soldering is fun :) The more you solder, the better you get.

Vince
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