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- Newsgroups: comp.unix.bsd
- Path: sparky!uunet!usc!cs.utexas.edu!zaphod.mps.ohio-state.edu!uwm.edu!spool.mu.edu!umn.edu!csus.edu!netcom.com!hasty
- From: hasty@netcom.com (Amancio Hasty Jr)
- Subject: Re: [386BSD] Problems booting on Gateway 4DX2-66V
- Message-ID: <1992Nov12.082440.7009@netcom.com>
- Keywords: 386 bsd boot problems gateway local bus
- Organization: Netcom - Online Communication Services (408 241-9760 guest)
- References: <dhess.721500427@Xenon.Stanford.EDU> <1992Nov11.184048.2256@alliant.com> <1992Nov12.080051.5911@netcom.com>
- Distribution: comp
- Date: Thu, 12 Nov 1992 08:24:40 GMT
- Lines: 117
-
- In article <1992Nov12.080051.5911@netcom.com> rimkus@netcom.com (Mike Rimkus) writes:
- >In article <1992Nov11.184048.2256@alliant.com> dufault@alliant.com (Peter Dufault) writes:
- >>(No one responded first time. Micronics 486VL won't boot from floppy).
- >>
- >>You need the patch provided by "someone"@kithrup.com. (sorry, the
- >>mail is somewhere else). It changes the bit pattern that we are
- >>waiting to show up in one of the floppy control registers.
- >
- >
- >I have the same problem, but on a Gateway 486DX2-50 system (no local bus). Does
- >this patch help me?
-
- Anyone out there running an S3 on a local bus?
-
- Here the previously mentioned patch for a local bus system.
-
-
- Amancio
-
- -----------------------------------------------------------------
- Article 7619 of comp.unix.bsd:
- Newsgroups: comp.unix.bsd
- Path: netcom.com!csus.edu!wupost!zaphod.mps.ohio-state.edu!cs.utexas.edu!uunet!kithrup!wilson
- From: wilson@kithrup.COM (Jim Wilson)
- Subject: solved: Problems with getting 386BSD 0.1 to run on Micronics 486VL
- Organization: Kithrup Enterprises, Ltd.
- Date: Mon, 19 Oct 1992 18:33:25 GMT
- Message-ID: <1992Oct19.183325.6828@kithrup.COM>
- References: <1992Oct12.061945.530@kithrup.COM>
- Lines: 83
-
- In article <1992Oct12.061945.530@kithrup.COM> sef@kithrup.COM (Sean Eric Fagan) writes:
- >My apartmentmate just bought a 486 machine, and we've been trying to get
- >386bsd 0.1 to boot. In the meantime, I also tried to get it running on my
- >machine, and it failed there, also.
-
- I have managed to get 386BSD 0.1 booted on my Micronics 486DX33 ISA/VL-Bus
- motherboard.
-
- It would not boot with any of the available boot floppies. In all cases
- it gave the same behaviour: the floppy drive light would come on, the
- floppy would spin, but the floopy drive never seeked, and no messages
- appeared on the screen.
-
- After much trial and error experimentation, I determined that it was
- going into an infinite loop in the fdboot code. It repeatedly reads
- a programmable interrupt controller register waiting for the value 6
- to appear. On my machine, it never does, instead the value 7 appears
- in the controller register. After patching binaries to check for 7
- instead of 6, I was able to successfully boot both the dist.fs and
- fixit.fs floppies. I don't know whether this is the correct change.
- The correct fix may be that this low bit should be masked out before
- the comparion. I don't have any info on the PIC chip, so I can't
- tell which is the better solution.
-
- I have a second problem now, in that about half the time after the
- machine boots, it won't respond to the keyboard, but you can login
- across the network fine. This was much more common when booting from
- floppies than it is when booting from the harddisk. I do not know
- the solution for this but will probably investigate it when I have
- the time.
-
- To patch a boot floppy, edit a *.fs file with emacs, seach for
- the string '<^F', and change the ^F to a ^G. This change will enable
- a boot floopy to boot on a Micronics 486VL motherboard, but I haven't
- tested it on any other machine.
-
- In source:
- Alternative 1 (which is the same as the emacs patch above):
-
- *** fdbootblk.c.or Mon Jun 22 06:56:47 1992
- --- fdbootblk.c Sat Oct 17 20:37:29 1992
- *************** dodisk:
- *** 249,255 ****
- NOP
- inb %dx,%al
- andb $0x7f,%al
- ! cmpb $6,%al
- jne 2b
- NOP
- movb $0x20,%al # do a eoi
- --- 249,255 ----
- NOP
- inb %dx,%al
- andb $0x7f,%al
- ! cmpb $0x7,%al
- jne 2b
- NOP
- movb $0x20,%al # do a eoi
-
- Alternative 2:
-
- *** fdbootblk.c.or Mon Oct 19 12:01:11 1992
- --- fdbootblk.c Mon Oct 19 12:01:46 1992
- *************** dodisk:
- *** 248,254 ****
- outb %al,%dx
- NOP
- inb %dx,%al
- ! andb $0x7f,%al
- cmpb $6,%al
- jne 2b
- NOP
- --- 248,254 ----
- outb %al,%dx
- NOP
- inb %dx,%al
- ! andb $0x7e,%al
- cmpb $6,%al
- jne 2b
- NOP
- --
- Jim Wilson wilson@cygnus.com, wilson@kithrup.com
- Cygnus Support, 814 University Avenue, Palo Alto, CA 94301, +1 415 322 5167
-
-
-
-