AMI TECH TIP

                                       AMI TECH TIP


TECH TIP NO.        TT99.006

DATE:               9/26/91
BOARD TYPES:   Series 21, Voyager II
               Series 24, Mark IV Screamer
ORIGINATOR:         Vivek Saxena
RELEASED BY:   Documentation Control

Special PALS Available for Banyan Networks

This Tech Tip concerns the ICA (Intelligent Communications Adapter)
cards for Banyan Networks.  The Banyan ICA card requires 128 KB of region
between the 0 - 16 MB range, which does not decode as system RAM and
consequently is not cached.

This memory area can be provided in two ways:

1.   In 512 KB to 640 KB region, below 1 MB.

     This solution has already been released in a previous Tech Tip (TT99.005, dated 9/17/91).  A recap of that solution is listed below:

                         Original PAL   New PAL

Series 24, SCREAMER (U87):H00E2412        H20E2412
Series 21, VOYAGER II (U113):D00E2116   D20E2116

2.   384 KB Below 16 MB.

     In this case, this additional 384 KB memory will be released only when the total system memory is 16 MB.  This PAL will not affect any other memory combinations.

If you plan to use a maximum of 12 MB memory, then this PAL change is not required.

                         Original PAL   New PAL

Series 24, SCREAMER (U68):     M00B2411 M20B2411
Series 21, VOYAGER II (U114):H00E2115   H20E2115






                                                                             Continued on next page.
Tech Tip TT99.006 - Continued


The following memory combinations will be affected by this PAL change:

Series 24, Mark IV SCREAMER:

     -Bank1 4Mx9 Type + Banks 2-4 Absent
     -Banks 1-4 1Mx9 Type

Series 21, VOYAGER II:

     -Bank1 4Mx9 Type + Banks 2-6 Absent
     -Banks 1-4 1Mx9 Type + Banks 5-6 Absent.

These PALS are not a part of normal production for these series.  They
are available as special request PALS and should be ordered through Sales
or AMI Technical support.

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