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Re: No kernel output on MicroVAX 3100-30

Den 2018-09-11 kl. 10:38, skrev Erno Palonheimo:
On Mon, Sep 10, 2018 at 09:13:03PM -0400, Charles Dickman wrote:
On Thu, Sep 6, 2018 at 11:34 PM Erno Palonheimo <esp%iki.fi@localhost> wrote:
On Thu, Sep 06, 2018 at 08:29:30PM -0400, Charles Dickman wrote:
On Thu, Sep 6, 2018 at 3:41 AM Erno Palonheimo <esp%iki.fi@localhost> wrote:
On Sat, Sep 01, 2018 at 10:27:33AM +0200, Anders Magnusson wrote:
Den 2018-09-01 kl. 10:12, skrev Erno Palonheimo:
On Sat, Sep 01, 2018 at 12:56:22AM +0200, Johnny Billquist wrote:
Any ideas?
What about memory size?
24 megabytes, shouldn't be a problem - and wasn't. I suppose 8.0 could
run in 12 megabytes, possibly even 8.
8.0 boots fine on my VAXstation 4000 model 60 with 104MB.

8.0 does NOT boot on a VAXstation 3100 model 30 with 16MB. I was not
able to get it to net boot install.ram or the GENERIC kernel. Both
restart right after the loader progress lines showing sizes finishes.
There are problems on some machines (MVII and MVIII for sure) when the
kernel size gets close to 4MB. These machines have SG DMA maps only
capable of mapping 4MB. boot doesn't change the mapping, so everything
has to fit into the first 4MB. This may not be the problem Erno is
seeing, but it is a problem.
My problem seemed to be lcg framebuffer driver not checking carefully
enough whether the machine is or isn't a VLC. 3100-30/40 seem to share
the same board ID, but different siedata. Checking this in the driver
allows the system boot a GENERIC kernel without problem. It should
still work as intended on a VLC.
Great!  Thanks for your patches!

Can you please do a diff -u and send me?  Then I will check them in.

-- Ragge

Index: arch/vax/vsa/lcg.c
RCS file: /cvsroot/src/sys/arch/vax/vsa/lcg.c,v
retrieving revision 1.2
diff -r1.2 lcg.c
       if ((vax_boardtype == VAX_BTYP_48) && ((vax_siedata & 3) == 1))
               return 0;

       if ((vax_boardtype == VAX_BTYP_48) && ((vax_siedata & 3) == 1))
               return; /* No LCG on a MicroVAX 3100 m30/40 */

Here's another small patch which allows one to compile a kernel with
dz on vsbus but without lkkbd. I am not sure if this one is correct,
but looking at the driver I couldn't figure out anything wrong with
doing this.

Index: arch/vax/vsa/dz_vsbus.c
RCS file: /cvsroot/src/sys/arch/vax/vsa/dz_vsbus.c,v
retrieving revision 1.44
diff -r1.44 dz_vsbus.c
#if NDZKBD > 0

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