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Newsgroups: comp.sys.nsc.32k
Subject: Another one lives!
Message-ID: <9011110034.AA28201@virtech.UUCP>
Date: 11 Nov 90 00:34:36 GMT
Sender: news@daver.bungi.com
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Approved: news@daver.bungi.com

Yippee!  My PC532 is up!

Thanks to Robert Vincent for his no-FPU patches.  The exact addresses to patch
in the ROM are as follows:
	01E1: 04 -> 02
	01FE: 02 -> 01
	0288: 02 -> 01
	02EB: 04 -> 02
	5C00: F7 -> F5 (initial CFG lsb)

I debugged the problems with a logic probe only.  In so doing, I uncovered
two Hidden Mysteries of the PC-532:

1. The console connector is CONN3.  The baud rate is 9600.

2. If only 4 SIMMs are used, they must be installed at U6, U8, U10 and U12 -
   every *other* slot, *Not* the first 4!!  (How did I figure that out?
   Call it intuition.)

The rest is denoument.  I even wrote a downloader for PC-DOS and got Minix
up and running.  But nothing could exceed the thrill of seeing that monitor
prompt for the first time.  (Well, almost nothing.)

While I have the podium, extracting the 532 chip from the Designer's Kit
board was incredibly difficult.  It took me almost an hour.  No way am I
going to try that again.  Is anyone interested in a DK-532, minus 532,
in PS/2 cabinet with power supply, including all bipolar RAM, 16550s,
etc.?

And by the way, what a great monitor!!

And of course, thanks to Dave Rand, George Scolaro, Steve Ligett, Bruce
Culbertson, and all the rest of you fine folks out there who have done
such a terrific job designing a great computer.  Throw out your glitter
boxes!  The PC532 has arrived!