HP9825A - Display Board (9825-69541E)

I have three pcs of this board. All are working. I have created full documentation for HP9825A Display Board (Rev.E) and make an example software in assembler for CPU 80C535 to demonstrate how to control this display board.

9825a-69551e - HP9825A Display Board
Fig. 1 - original board 9825A-69541 Display board

Documents:

  • schematics
  • components location on PCB
  • bill of materials (BOM)
  • connector signals pinout
  • software examples

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