Re: looking for an S-100 expert builder to build and test prototype board

[yoda <yo...@r2d2.org>]

Ok - Thanks - I have ordered both so should be able to experiment in
that area too.

On Dec 15, 5:46 pm, "Andrew Lynch" <LYN...@YAHOO.COM> wrote:
> Hi!  The V9958 should also work but it does not support composite video
> output.
>
> The chips are largely similar from a pin out and functional perspective but
> the V9958 contains additional modes the V9938 does not.
>
> Part of the build and test will be hashing out what is required to make the
> V9958 work with the socket.
>
> The current design is for V9938 only and would require some jumpers to
> convert.
>
> Assuming we could get the VGA like interface working the prospects for V9958
> are much better.
>
> Thanks and have a nice day!
>
> Andrew Lynch
>
>
>
>
>
>
>
> -----Original Message-----
> From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On
>
> Behalf Of yoda
> Sent: Thursday, December 15, 2011 1:57 PM
> To: N8VEM-S100
> Subject: [N8VEM-S100:546] Re: looking for an S-100 expert builder to build
> and test prototype board
>
> Never mind on the 4164 - I misread they are 41464's which are 18pin.
> Still would like answer on v9958 - they are 2.5 times cheaper than
> v9938
>
> On Dec 15, 12:52 pm, yoda <y....@r2d2.org> wrote:
> > Hi Andrew
>
> > I am a little confused when looking at the schematics and parts list.
> > You are showing the 4164 as an 18 pin device but everywhere I look it
> > is a 16 pin device - am I missing something?   Also can a v9958 be
> > substituted as well?
>
> > Dave
>
> > On Dec 14, 5:50 am, lynchaj <lyn...@yahoo.com> wrote:
>
> > > Hi,
>
> > > There is an S-100 board project that is ready for prototype build
> > > and test but the project is "stuck in the mud" due to availability
> > > issues (aka "real life") of the original design team.
>
> > > Is there anyone who would like to take on a build and test of a
> > > rather ambitious S-100 board?  The project I am referring to is the
> > > S-100 VDP which is a video board based on the V9938/V9958 video
> > > display processor.
>
> > > This board has potential for greatly improved color graphics, 80
> > > column text, etc using the latest of the VDPs which descended from
> > > the original TMS9918.
>
> > > I have a design schematic and PCB layout which is ready for
> > > prototype build and test.  However it will stay on the "black board"
> > > until some builder can make it a reality.
>
> > > The design could even be extended to include audio (AY-3-8910 or
> > > similar) once we get the video section working.  This would provide
> > > a measure of MSX compatibility for the S-100 bus systems.  There is
> > > quite a bit of stuff we can export from the N8VEM N8 "all in one"
> > > project to this board to accelerate an improved design.
>
> > > This board is deceptively simple looking but is not for the feint of
> > > heart.  Video boards never are...
>
> > > Anyone interested?  Thanks and have a nice day!
>
> > > Andrew Lynch