I was just thinking of you today. I will get the component/pin numbers= , but I would like to know where your VB1B is getting one of its signals. I b= uilt the board to the schematic in the manual, but had to do patch and modif= y from the SSM schematic to get rid of some tearing on the top. I am wonderi= ng if there were different versions of the VB1B. Or maybe it is just a= nother mistake in the schematic. I caught a few other mistakes, but I didn=E2= =80=99t work through this part of the logic and it slipped past me.

Regards

Craig

On Feb 27, 2024, a= t 6:05=E2=80=AFPM, Mark Huffstutter <mhuffstutter@outlook.com> wrote:<= br>

=EF=BB=BF=

Hi Cra= ig,

=            Wow, You= got them wound up on the S-100 Computers mailer! :>)
&= nbsp;

=            I wanted to let= You know that I have not forgotten about the SSM

Boards= for Your project. Short, stupid story; because My Provider went<= /span>

Cheap a= nd stopped their flu vaccine program, I showed them by deciding

That I= never get the flu anyway, so no shot last 2 years. What a Maroon=E2=80=A6

&= nbsp;

=            Accordingly, I d= id, it knocked My dumb 68 yr. self flat last week=E2=80=A6..

I have= found the IO-4 and the CB2, don=E2=80=99t have my hands on the MB-4 just ye= t.

I migh= t just send them Your way first.

&= nbsp;

Mark

&= nbsp;

&= nbsp;

&= nbsp;

From: SBC-85 <craig@sbc-85.com>
Sent: Friday, February 16, 2024 9:30 PM
To: Mark Huffstutter <mhuffstutter@outlook.com>
Subject: Re: SSM CB1

Yes, I would like to do a SSM video sometime and woul= d like to borrow ones I don=E2=80=99t have.

Hobbyists stacking chips is one things, but SSM calli= ng it an 8k and expecting users to stack chips seems a bit too much.

On Feb 16, 2024, at 8:= 38=E2=80=AFPM, Mark Huffstutter <mhuffstutter@outlook.com> wrote:

=EF=BB=BF

Hi Cra= ig,

=            Congrats on fin= ding a VB1B, I hope the cost wasn=E2=80=99t too silly=E2=80=A6.<= /o:p>

=

In oth= er SSM boards, I have their Z-80 (Mostek 3880) CPU board CB2, and one of

The ve= nerable old IO-4=E2=80=99s. The others are just variants of what You already= have,

Like t= he VB1C that I mentioned earlier.

=

=            I don=E2=80=99t= really want to sell any of them just yet, I haven=E2=80=99t gotten around

To pla= ying with them yet! I will promise to give you first consideration if I do

Decide= to part with them later.

=

=            As I haven=E2=80= =99t yet used them, they are not wrung out yet, just tested for<= /o:p>

Bad ta= ntalums. Which I learned the hard way after being a bit impatient,

Pluggi= ng in and powering up an old Northstar memory board=E2=80=A6.Then spending a=

week o= r so repairing the carbon-crater around one of the regulators. That was

the fi= rst time I had one go off that badly=E2=80=A6.. won=E2=80=99t forget.=

=

=            Much later in t= he evening I did actually come to the conclusion that

Ram ch= ip stacking would be the only way to upgrade, but then decided that

Was po= tentially just too flakey, and SSM would never do that. Then I recalled

How ex= pensive all the S100 stuff was back then, and that about anyone into<= o:p>

S100 b= ack then was by nature very well skilled. And ram stacking did work for

the TR= S-80 =E2=80=9CUpgrades=E2=80=9D back in the Day!

=

=            Thank You for t= he MB-4 manual copy, I appreciate it. I kind of forgot that

Phil d= oes sell copies, and sure seems to have a lot of unusual ones.

=

=

Mark

=

From: SBC-85 <craig@sbc-85.com>
Sent: Friday, February 16, 2024 8:46 AM
To: Mark Huffstutter <= mhuffstutter@outlook.com>
Subject: Re: SSM CB1

Hi Mark,

The mb4 is =E2=80=9Cupgraded=E2=80=9D by double stack= ing the RAM chips. Solder another RAM onto the first except leave the CE uns= oldered and pointing up. Then run a wire across all the CE in that row and d= own to a pad by the rightmost RAM . Then jumper the 8k. I bought the manual from herb, see attached.

Which other SSM boards do you have?

I would like to borrow this one and maybe others a vi= deo of the important SSM boards. (Borrow unless you are willing to sel= l them)

I was able to buy a vb1b video board and do not need t= o borrow yours anymore. I made a reproduction and am testing it now w= ith my cb1A 8080 cpu board.

Regards

Craig

On Feb 15, 2024, at 9:= 44=E2=80=AFPM, Mark Huffstutter <mhuffstutter@outlook.com> wrote:

=EF=BB=BF

Hi Cr= aig,

= ;           Yes, I d= o, it=E2=80=99s a labelled SSM MB-4, branded for Cybercom.=

Until= You just mentioned it, I had never noticed the 8K jumper pad

On th= e board! I have not found a manual, and really did not know

It wa= s upgradeable. I wonder which RAM you would use, and can
Simpl= y that jumper handle the addressing?

= ;

= ;           I also now rem= ember that we had talked about my VB-1, and

You m= entioned something about a January time frame. Now that we=

Are h= alfway through February=E2=80=A6. Did I get a brain fade, was I supposed

To ha= ve already sent it your way?

= ;

= ;           Anyway=E2=80=A6= .. It will take Me a Minute to find the MB-4, I have a

Rough= idea where it is, I just haven=E2=80=99t had it out in a while. I checked i= t

For b= ad tantalums, but I have not otherwise tested. I can certainly send

Both y= our way.

= ;

Mark<= /span>

= ;

From: cra= ig@sbc-85.com <craig@sbc-85.com>
Sent: Thursday, February 15, 2024 7:40 PM
To: 'Mark Huffstutter' <mhuffstutter@outlook.com>
Subject: RE: SSM CB1

Hi Mark,

Do you have a SSM MB4 which is a 4K/8K RAM board?

Regards

craig

From: Mark Huffstutter <mhuffstutter@outlook.com>
Sent: Thursday, December 21, 2023 7:50 PM
To: craig@sbc-85.com
Subject: RE: SSM CB1

Hi Cr= aig,

= ;           I do, I= have a B somewhere, and a C that I have handy. I think the

Main d= ifference between the two, aside from using a different, but same size,

Mask R= OM for the CG, is that they made it a bit more IEEE 696 compliant.

Haven= =E2=80=99t really studied it completely yet, but indications were that specs=

Match= ed the B.

= ;

= ;           I can sure sen= d it your way if you want to use it for a while, I just
Won=E2= =80=99t be able to send it until the 26^th. The P.O. is just a Zoo= , I was there

yeste= rday, and it wouldn=E2=80=99t get anywhere over the weekend anyway.

= ;

= ;           I have not tes= ted this board, but It came from a collection that

Has b= een very nice quality so far. It came (Back) from the UK, so hopefully

The o= wner never modded it for 50 Hz=E2=80=A6. Just kidding, I think=E2=80=A6. The= boards

That I= have purchased so far lead Me to believe He was more of a collector.=

= ;

Best,=

Mark<= /span>

= ;

From: cra= ig@sbc-85.com <craig@sbc-85.com>
Sent: Thursday, December 21, 2023 5:04 PM
To: 'Mark Huffstutter' <mhuffstutter@outlook.com>
Subject: RE: SSM CB1

Hi Mark

You don=E2=80=99t happen to have a SSM VB1 video car= d do you?

From: Mark Huffstutter <mhuffstutter@outlook.com>
Sent: Wednesday, December 13, 2023 10:25 PM
To: craig@sbc-85.com
Subject: RE: SSM CB1

Ha! D= efinitely no attention span problem with This project, just interrupted

By a p= hone call from my brother, who apparently has a lifetime PC Support

Contr= act with me=E2=80=A6. :>)

= ;

= ;           I did forget t= hat You work with a pretty good lead time too, that=E2=80=99s

reall= y the best way to do it. Maybe I=E2=80=99ll dump the PROM on My CB1 and send=

it al= ong, see if you find anything on it. I some time ago ran into a reference to=

NS Li= nk in reference to a monitor, but it exceeds my diminishing memory specs=E2=80= =A6

Maybe= Northstar something.

= ;

= ;           I see I=E2=80=99= m further behind than I thought, congrats on a very Nifty troubleshoot

And r= epair on your Prompt 48! I finally found a Ferguson Big Board II for less th= an an

=E2=80= =9CAre You Kidding Me?!=E2=80=9D price, so that=E2=80=99s been using up my d= iminishing brain power lately.

= ;

Looki= ng forward to this series!

= ;

Mark<= /span>

= ;

= ;

= ;

From: cra= ig@sbc-85.com <craig@sbc-85.com>
Sent: Wednesday, December 13, 2023 9:59 PM
To: 'Mark Huffstutter' <mhuffstutter@outlook.com>
Subject: RE: SSM CB1

Extra points for making it to the end =F0=9F=98=89

The content of the video is a little old (due to the= magic of procrastination) so I am a little further along than I was when it= was recorded. I am not sure I have a working solution, but I am makin= g good progress. Stay tuned

From: Mark Huffstutter <mhuffstutter@outlook.com>
Sent: Wednesday, December 13, 2023 9:45 PM
To: craig@sbc-85.com
Subject: SSM CB1

   &= nbsp;        Aha! Now that I made it to t= he end of the video I get it, You are doing a much Cooler project, as=

I should have known= ! This is going to be Great!

<= /o:p>

Mark

<20200910_183824.jpg>

<s-l1600.jpg>

<SSM IO-4.jpg>

= --Apple-Mail-D08D2247-C566-4B73-9106-A24495F69379--