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- AMI TECH TIP
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- TECH TIP NO. 16.001
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- DATE: May 8, 1991
- BOARD TYPE: Enterprise II, Series-16
- BOARD REVISION: D or D1
- BOARD FREQUENCY: 25MHz or 33MHz
- RELEASED BY: Engineering Dept.
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- PROBLEM: 1. The Impact Super VGA card from Trident may fail when plugged
- into the Enterprise II motherboard. (This problem will also
- affect the Enterprise I motherboard, Series-25. See Tech Tip
- No. 25.001).
-
- NOTE: The problem above does not effect Series-16, Rev-D1.
-
- 2. The power LED will not work.
-
- REASON: 1. There were two capacitors added to this board with ECN 16.002.
- They are filter caps to eliminate reflections on the IORC# and
- IOWC# signals. These capacitors may cause the Impact Super
- VGA card from Trident to fail.
-
- 2. The Keyboard Lock connector was wired improperly. Pin 2 was
- connected to GND by mistake. Pin 3 should have been connected
- to GND.
-
- SOLUTION: 1. This problem is currently being evaluated and a solution has
- not yet been found that will take care of the reflection
- problem and the video problem simultaneously. When a solution
- has been reached, an ECN will be implemented immediately. In
- the meantime, if a customer must use the Impact Super VGA card
- from Trident, he may have to remove the capacitors soldered
- on top of U89. However, if he is using several EISA slots,
- this may cause other problems such as "CMOS INOPERATIONAL".
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- 2. Solder a wire from J14 pin 2 to J14 pin 3 on the solder side
- of the board (See ECN No. 16.004).
-