mercredi 6 février 2019

16 banks of internal 2Kb auto-backuped SRAM.

And now, the equivalent of 16 x 6116 auto-saved memories for your favorite vintage machine like :

  • Alpha Juno 1-2
  • Juno 106
  • JX-3P
  • MKS-30
  • JX-8P
  • JP-6
  • TR707
  • Prophet 600
  • DW6000
  • DW8000

and many others...

On the past, I developed a simple solution that had the disadvantage of only using part of the new memory component:


Very effective solution, for example inside a Roland JX-8P :


But, only 2Kb are used on the 32Kb that contains the new RAM.

So I decided to do a new version with an additionnal connector for the extra addresses selection :


The J1 connector will allow to select the memory bank using an external selection solution.

The other side of the board :


This board will be a little bigger than the previous version but still very closed to the original size of a 6116 SRAM chip :


Once this card will have been tested, it will remain to develop the board of the memory banks selection system.