#: 19294 S12/OS9/68000 (OSK)
    08-Nov-93  21:59:59
Sb: #19222-MM1-68340
Fm: Carl Kreider 71076,76
To: Zack Sessions 71532,1555 (X)

Zack,

> Hmm, was that U18 on the IO board by any chance? Reason I ask was that I >
received just today, a replacement PAL for U18, from Bill Wittman. He states >
in his letter that "on some systems, not many" require the new PAL to help >
solve "hard drive problems". Even though I am not having hard drive problems >
(unless you consider not being able to boot from the hard drive as a >
"problem"), "Pease highly recommends that you put it in".

We sent the new U18 PALs to Bill to distribute to the Atlanta buyers.  It fixes
a problem that didn't exist in the MM/1 but shows up with the faster processor.
Everyone *really should* put in the PAL.  It will be included in all future
kits.

The problem is that the chip select to the WD33C93 SCSI chip may (depending on
speed of other parts, temperature, phase of the moon, etc) go away before the
write strobe does.  This hoses the SCSI chip and causes it to write garbage to
the disk.  We changed the PAL equations to make write go away first to solve
the problem.

> And I concur, support from Kevin Pease and Carl Kreider has been excellent.

Thank you.  We try hard.  :)

Carl