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Braze Technologies |
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Innovative solutions for the "classic" arcade collector
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Donkey Kone 3 High Score Save Kit --
Trouble Shooting |
A common mistake is not having the daughter card inserted correctly, either
hanging over the socket by 1 pin, or in backwards. In this case you will usually
just see the powerup garbage on the screen. This garbage is just the random bits
that are in the character RAM at powerup, and it indicates the CPU was not able
to run.
Another common mistake is for the Z80 CPU to have been inserted incorrectly,
either backwards, or possibly with a pin bent that did not insert into the
socket properly.
The Donkey Kong 3 high score save kit will
perform a very simple powerup selftest of the HS daughter cards on
powerup. Should this mini selftest fail, the text HS FAILURE will
appear on the bottom line during the very first attract mode
screen. After that, it is cleared by the subsequent attract mode
screens, so you need to check for this immediately after powering up the
game. A sample screen showing the failure is shown to the right. If you
see this failure, most likely that means that one of the socketted chips
on the daughter card is probably lose. Check to make sure the 8 pin dip
(the smallest chip) on the HS daughter card is fully inserted into its
socket. |
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