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From: wjc@eddie.MIT.EDU (Bill Chiarchiaro)
Newsgroups: comp.os.minix
Subject: Problems compiling kernel; problems with build(?)
Message-ID: <5692@eddie.MIT.EDU>
Date: Sun, 3-May-87 18:03:29 EDT
Article-I.D.: eddie.5692
Posted: Sun May  3 18:03:29 1987
Date-Received: Sun, 3-May-87 22:00:49 EDT
Organization: MIT EE/CS Computer Facility, Cambridge, MA
Lines: 69


Please excuse the length of this posting, but I wanted to provide
as thorough a description of my problem as possible.

I am having problems compiling the MINX kernel and building good
boot diskettes.  My machine is a Leading Edge MP-1673 with 640K
and two 320KB floppy drives.  I also have the Leading Edge
Monochrome Display/Parallel printer adapter, a Standard Brands
Multifunction card, and a Standard Brands FlashCard 30 (MiniScribe
8425 Winchester drive with Western Digital WX1002-27X RLL controller).
The 8088's clock rate is switchable to either 4.77 or 7.16 MHz.

When I try to compile the kernel and build a boot diskette, I get
one of three results:
		1) A working boot diskette.
		2) A fatal error during the "make" of the kernel.
		3) No errors from make, cc, or build, but a
			boot diskette that doesn't boot.
Out of the first 8 times I tried to make a boot diskette, only 1 was
successful.  I then realized that I wasn't sure which CPU speed I
had been using; I had been changing it for other purposes.  I dropped
the speed to 4.77 MHz and my next 3 attempts were all successful.
However, my last 4 attempts have all failed.

Of the 4 successful attempts, 2 started with a make from scratch of the
sources in the kernel directory, and the other 2 consisted of compiling
only one source file (printer.c or wini.c) and asld'ing with the
other previously-compilied files.  The build's have always used the existing
object files in the tools directory, except for my new kernel object files.

The error mentioned in item 2 above is of the form:
	make
		.
		.
		cc -S -Di8088 -w -F -T. floppy.c
		Unrecoverable disk error on device 2/0, block 330
		/usr/lib/opt: error on line 825(%*s): unknown instruction byte
	Make Error code 1

	***Stop.

Note that the error does not necessarily occur during the compiliation
of floppy.c or during the opt phase of the compiler; these are just
examples.  Also, the error can occur on device 2/1 and at different block
numbers.  I also tried switching the diskettes between the two
drives and have still seen the error.  After getting the error, I can
cat every file on the kernel diskette without any problems.

The problem mentioned in item 3 goes as follows:  I go through a make (or
single cc and asld) of the kernel, move the new kernel to the tools
diskette, and do a build.  No errors have occured up to this point.
However, when I try to boot the new boot diskette, I get the following
message:
		Booting MINIX 1.1
		Read Error.  Automatic reboot.
The machine then sits in a loop repeating the message.

I have had no problems with the machine under MS-DOS 2.11 or 3.10.  Under
MINIX, the only other problems I have had have been the expected ones
with the hard disk and parallel printer, and also that the shell sometimes
does not return a prompt after completing a command (hitting the interrupt
character wakes it up).

Can anyone give me any advice?

Thanks,
Bill
N1CPK
wjc@eddie.mit.edu