


January 30, 1986

To: Lynne Alexander
    Norm Kelly
    Dennis Smith
    Raj Rajguru

From: Robert Briody

Re: Customers requiring address variations (Cxxxxx H and Dxxxxx H) on
    the ICP-16 / 8.

On the ICP-16 / 8 some customers are requiring addresses other than those
provided as standard by ISI. They are as follows:

     VME Address bits

  A23   A22   A21   A20     Hex
----------------------------------------
  1     1     1     1        F

  1     1     0     1        D
  
  1     1     0     0        C

For boards requiring a base address change FROM Fxxxxx H TO Cxxxxx H, make the
following changes:

1) Change IC 9A FROM a 74LS240 TO a 74S240.
2) Cut trace connecting A) IC 4C-14 to IC 2C-15 and B) IC 4C-15 to IC 2C-14
3) Add the following jumpers:
   A) IC 2C-15 to IC 9A-2
   B) IC 4C-14 to IC 9A-18
   C) IC 2C-14 to IC 9A-4
   D) IC 4C-15 to IC 9A-16

For boards requiring a base address change FROM Fxxxxx H TO Dxxxxx H, make the
following changes:

1) Change IC 9A FROM a 74LS240 TO a 74S240.
2) Cut trace connecting IC 4C-15 to IC 2C-14.
3) Add the following jumpers:
   A) IC 2C-14 to IC 9A-4
   B) IC 4C-15 to IC 9A-16

Because of recent ECO's to the ICP-16 / 8, the modifications requested by 
Articon (board address of dff520 H) using IC gate 9B are no longer valid.
The procedure outlined above is to be used instead.

