[sebhc] H89 roms

Joe Smith bandit1921 at cox.net
Tue Dec 13 05:19:43 CST 2005

I am thinking I might have one that is not of the dual voltage 
variety. Will require some looking to find it as we just moved here a 
few months ago and things are still here and there,if you know  what 
I mean.There might even be one in my working H89..It has a CDR board 
in it at the moment,only because, I have misplaced my Z37 board.

At 10:53 AM 12/13/2005 +0000, you wrote:
>I totally missed that one, Joe. Further checking and the 444-62 that I have
>is indeed a TMS 2716JL and the datasheet clearly shows a multi-supply
>requirement of +12v, +5v and -5v as you say.
>Not surprising that my trusty S4 is having problems reading it (I'm getting
>all locations = 00). Looking at the H88/89 schematic I can now see that
>there are jumpers to allow the selection of a single-voltage 5v device
>instead, which is good news seeing as I don't have a collection of the TMS
>Thanks for looking for the binaries (or intelhex(es)) for the MTR ROMs. I'd
>like to get both these machines running again. Even if the original 444-62
>is OK, it would be nice to have a backup copy. If you don't have a dump of
>this one, I'll look at building a simple reader for it so we can have backup
>copies to burn into "normal" 2716s.
>Unfortunately I can't offer any help with regards to the H8 PCB you have as
>I don't have any H8 stuff, but perhaps something on these HDOS disks I have
>here could be of use to you (or anyone) once I get these machines going!
>Robin England
>----- Original Message -----
>From: "Joe Smith" <bandit1921 at cox.net>
>To: <sebhc at sebhc.org>
>Sent: Tuesday, December 13, 2005 5:26 AM
>Subject: [sebhc] H89 roms
> > I have the 444-142, and if I look I might have the 62 also,first one
> > I found I cannot copy as if I remember correctly,the TMS series were
> > dual voltage types.My burner won't read it correctly or it gave up on
> > me,full of FF's.I'll look for the 62 in a different chip that I can read.
> >
> > I have a question on and H8 board I have,part number is 85-2204-1, I
> > have no manual on it, I acquired it with some other stuff,it also has
> > no parts stuffed in it,basically a brand new board. Anyone have an
> > idea what it is? It is marked as a "Controller Board"
> >
> > Joe Smith
> > joebandit
> > jtsdadinaz
> > Conbuilder debugger /Programmer
> >
> > --
> > Delivered by the SEBHC Mailing List
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Joe Smith
Conbuilder debugger /Programmer

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