Quoted from spongeking:working on Sinbad have read many forms but none has address the issue i have
turn off and on most of the time it credits 48 credits i get down to 38 turn off back on it goes back to 48 all dips are right volts 5.01 12.06
have swapped cpu board with another but it was a buck rogers rom that one i got it working
soon as i swap roms it goes back to this
any thoughts or help thank you
so say we all
Oops, that´s an interesting thing
If the original accu/battery is removed from the CPU-board, the data are logically deleted. But - if you then look at the credit display, you will see and notice, that the credits have exceeded the predetermined fixed value of Gottlieb; the credit-limit value for system 1 is maximum 15 credits!
Not very much indeed. With this "trick" - inserting a new battery to the CPU-board with the machine powered on - you can drive up the limit of 15 credits to maximum 99 credits. But caution: exceeding the 99-limit and falling below the 15-limit leads to the "Gottlieb standard", that says, that the MPU then is virtually "calibrated"!
- Ingo