RE: [N8VEM-S100:628] Re: S-100 68K CPU board status

["Andrew Lynch" <LYN...@YAHOO.COM>]

Hi Dave!  Thanks!  Here are Pontus's notes from the original V1 build.

https://files.pbworks.com/download/8eCeU8eXTS/n8vem-sbc/47736628/Pontus'%20N
otes.htm

There are photos in the S-100 68K CPU board V1 directory on the wiki.

I hope this helps!  Thanks and have a nice day!

Andrew Lynch

> -----Original Message-----
> From: n8vem...@googlegroups.com [mailto:n8vem-
> s1...@googlegroups.com] On Behalf Of yoda
> Sent: Wednesday, December 28, 2011 4:51 PM
> To: N8VEM-S100
> Subject: [N8VEM-S100:628] Re: S-100 68K CPU board status
> 
> Hi John
> 
> I plan on taking a stab at getting CP/M 68K up and running as well.
> Andrew just sent me one of the v1 68K boards so I should have in a few
days.
> I think I have all the parts on hand to put it together.  Do you have any
errata
> on changes you have had to make to the base board to get it functioning
> (that would speed up rediscovery of things you have already found).  I
plan
> to bring up with serial I/O board and IDE card with CF disk.  I will move
to
> propIO when I have a chance to breadboard my design - it is simpler than
> yours and is a variant of the one I did for the N8VEM.  I plan to add 2
IDE CF
> cards to the same board so I will have the majority of the I/O I need on a
> single card - don't know whether I will do that first or the 68K board -
> probably the 68K board first
> 
> Dave
> 
> On Dec 28, 1:14 pm, "John Monahan" <mon...@vitasoft.org> wrote:
> > That?s great on the 68K board Andrew. I'm running into some real
> > headwinds with the VGA board. Already extensive mods on the prototype
> > and I'm still not even accessing the EEPROMS! There are some strange
> > things going on with
> > 16 bit word access on odd/even addresses.  So when the 68K and MSDOS
> > support boards are optimized I may be ready for a break to something
> different.
> >
> > I was kind of hoping somebody here could take up the challenge of
> > getting a basic CPM68K going with our IDE board and Console I/O board
> > using the CompuPro BIOS. Should not be too difficult. That way I can
> > concentrate on hardware.  My goal for next year will be to have 32 bit
> > Intel & Motorola CPU chips on the S-100 bus.  It's going to need a lot
> > of hardware time (and prototype boards).
> >
> > John
> >
> > John Monahan Ph.D
> > mon...@vitasoft.org
> >
> >
> >
> >
> >
> >
> >
> > -----Original Message-----
> > From: n8vem...@googlegroups.com [mailto:n8vem-
> s1...@googlegroups.com]
> > On
> >
> > Behalf Of lynchaj
> > Sent: Wednesday, December 28, 2011 4:04 AM
> > To: N8VEM-S100
> > Subject: [N8VEM-S100:614] Re: S-100 68K CPU board status
> >
> > Hi John!  Thanks!  Wonderful news!
> >
> > Yes, the CompuPro documentation is excellent as is the DRI material.
> > It seems the "default" case in the DRI documentation is a $0400 loader
> > and a 128KB version of CP/M-68K.  If the same can be done with the
> > CompuPro binary images that would be a good place to start.
> >
> > Assuming you are using an S-100 4MB SRAM board, the most direct path
> > may be to just use the debug monitor to load the default CP/M-68K
> > binary image into RAM and tweak the CBIOS from there.  The DRI
> > documents say for a "bare bones" CP/M-68K the CBIOS needs about a
> > dozen functions or so like the console in and out and those for the
disk.
> >
> > I imagine the code required for interfacing to an S-100 IDE or S-100
> > ZFDC could be considerably simpler than a Disk1A.  Still a lot of work
> > but doable.
> >
> > Once even a bare bones CP/M-68K is running then its own tools are
> > available to help fill out the rest.  Its that first step that's the big
one!
> >
> > Good news on the S-100 68K CPU board PCB trace routing.  As of last
> > night there were 584 vias and overall trace length at 1450" or so.  At
> > the rate it was going it should complete a full pass in 2-2.5 days.
> > This is huge progress and the board has finally turned the corner.  It
> > still needs to lose about 200 vias to be even reasonable to make a
> > prototype but at least it is visibly moving.
> >
> > This is very exciting.  With Leon's Z80/8086 multiCPU running "in the
field"
> > I can see a day in the not to distant future of a Z80/8086/68K
> > multiCPU
> > S-100 system.  More to come for sure!
> >
> > Thanks and have a nice day!
> >
> > Andrew Lynch
> >
> > On Dec 27, 5:13 pm, "John Monahan" <mon...@vitasoft.org> wrote:
> > > My first choice would definitely be using the Godbout 68K image and
> > > splicing in a BIOS written in assembly. The Godbout/CompuPro systems
> > > we're outstanding. The documentation was great with great examples.
> > > That would be my first choice. It would be real easy to splice a
> > > BIOS into the very simple monitor I wrote,  see here:-
> >
> >
> >http://s100computers.com/Software%20Folder/68000%20Monitor/68000%
> 20Mo...
> > > tm
> >
> > > As to a windows based 68K assembler. I would highly
> > > recommendhttp://www.easy68k.com/
> >
> > > It is just fantastic for a job like this.
> >
> > > John Monahan Ph.D
> > > mon...@vitasoft.org
> >
> > > -----Original Message-----
> > > From: n8vem...@googlegroups.com
> > > [mailto:n8vem...@googlegroups.com]
> > > On
> >
> > > Behalf Of Mike
> > > Sent: Tuesday, December 27, 2011 12:47 PM
> > > To: n8vem...@googlegroups.com
> > > Subject: Re: [N8VEM-S100:607] Re: S-100 68K CPU board status
> >
> > > On 12/27/2011 03:28 PM, lynchaj wrote:
> > > > Woof!  OK, that's weird.
> >
> > > > My guess is Alcyon C compiler is really old and predates much of
> > > > the now more standardized C conventions.
> >
> > > > I've never seen or heard of anything like you just described.
> > > > This must be really obscure stuff.
> >
> > > > Here is a post on comp.os.cpm which seems to discuss the unnamed
> > > > structs
> >
> > > >http://groups.google.com/group/comp.os.cpm/msg/398560ac7ef058b6
> >
> > > > Forgive my ignorance but do you think the Alcyon C compiler is
> > > > capable of successfully compiling the CP/M-68K sources?
> >
> > > > Thanks and have a nice day!
> >
> > > > Andrew Lynch
> >
> > > Ha. Okay, so I'm not alone! :)
> >
> > > Yes, I would say almost certainly it should be able to compile the
> > > CP/M-68K sources, as it appears to be the exact compiler used to
> > > compile them originally.
> >
> > > --Mike
> >
> > >http://8bit.zapto.org-Hide quoted text -
> >
> > > - Show quoted text-