jp.jones
Member
Hello,
I've been trying to research this and found two posts about the change. However, there aren't any screenshots. I was curious if anyone had done this successfully and would be able to provide screenshots especially of step 4 which is confusing to me as I'm not sure what this 'feed through hole' is or the location of the solder point in the last step.
The first is from http://www.robotron-2084.co.uk/techwilliamscpubsbamod.html
Second from from mikesarcade where they pulled the instructions from the October 1982 Star*Tech Journal which included pictures (does anyone have access to this .PDF?)
1. On the chip at location 5A (under C63), cut the foil (trace) that
connects pin 3 to ground.
2. On the chip at location 6F (under C75), cut the foil (trace) that
connects pin 3 to ground.
3. Jumper the newly isolated pin 3 of both chips together.
4. Jumper pin 4 of the chip at location 5A *** to the feed thru hole
(unused via) leading to pin 32 of connector IJ4 (above R26).***
If I knew exactly what step four meant, I'd be all set to do the mod. Otherwise I have to troll ebay to pay high prices for something that isn't guaranteed to work. Or - if you have a Stargate/joust/robotron board for sale then please PM me.
Thanks for any help you can provide!
John
I've been trying to research this and found two posts about the change. However, there aren't any screenshots. I was curious if anyone had done this successfully and would be able to provide screenshots especially of step 4 which is confusing to me as I'm not sure what this 'feed through hole' is or the location of the solder point in the last step.
The first is from http://www.robotron-2084.co.uk/techwilliamscpubsbamod.html
Second from from mikesarcade where they pulled the instructions from the October 1982 Star*Tech Journal which included pictures (does anyone have access to this .PDF?)
1. On the chip at location 5A (under C63), cut the foil (trace) that
connects pin 3 to ground.
2. On the chip at location 6F (under C75), cut the foil (trace) that
connects pin 3 to ground.
3. Jumper the newly isolated pin 3 of both chips together.
4. Jumper pin 4 of the chip at location 5A *** to the feed thru hole
(unused via) leading to pin 32 of connector IJ4 (above R26).***
If I knew exactly what step four meant, I'd be all set to do the mod. Otherwise I have to troll ebay to pay high prices for something that isn't guaranteed to work. Or - if you have a Stargate/joust/robotron board for sale then please PM me.
Thanks for any help you can provide!
John
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