Re: [N8VEM-S100:5732] Re: EPROM/RAM board

Thanks Rich,

Ahh, so they are like the popular Amp Sockets, I like those. You can see if the metal contacts are deformed (which might happen if something thicker than an IC pin was inserted into them). I was wrong about my sockets, only some are the RW type, the others are single-wipe (still cheap) sockets. See pics below. The AMP socket is just for reference, I laid it on top an old board for a nicer back ground. But you can see at the bottom of each pin how the dual-wipes meet each other. If the metal wipes don't meet each other, then the socket is damaged. I have in the past even repaired a socket in place by removing the whole pin from the top and replacing with a one from another socket.

Re SSM IO4, Interesting to see they are using different sockets... what's the serial number on your card, I wonder if mine is an earlier build and they moved to the better sockets... or it could be the other way around, mine might be a later build and they moved to cheaper sockets? On second thought, I guess it doesn't really mean much.

Re Your problems, I understand the kids aren't getting along. I've been so busy with designing and VCF shows that I haven't had any time to build anything lately. The last project I built was your 65C02 board (where I learned the "C" matters). Well, hopefully, I'll be able to see my bench after World of Commodore show this weekend.

Cheers, Josh

Date: Tue, 2 Dec 2014 19:27:35 -0500
Subject: Re: [N8VEM-S100:5728] Re: EPROM/RAM board
From: rich...@verizon.net
To: n8vem...@googlegroups.com

Josh —

No, this board is rock-solid. I have several and use them on every system I have. The other one I like is the Interfacer I.

The model I have on this test system uses double-wipe sockets, not the enclosed ones you describe. I’m just having problems with it and the 16-bit CPU (8088) board).

Rich

Rich Cini

Collector of Classic Computers

Build Master and lead engineer, Altair32 Emulator

http://www.classiccmp.org/cini

http://www.classiccmp.org/altair32

From: Crusty OMO <crus...@hotmail.com>
Reply-To: S100-Post <n8vem...@googlegroups.com>
Date: Tuesday, December 2, 2014 at 7:01 PM
To: S100-Post <n8vem...@googlegroups.com>
Subject: RE: [N8VEM-S100:5727] Re: EPROM/RAM board

Rich, have you ever had any problems with your SSM IO4? I mentioned recently that mine was causing ghost characters, fixed after reseating the chips. I should also note that it had another problem 2 years ago when I first started using it (while bringing the IMSAI back to life). It would seem to work fine, then after sending a large stream of characters to the Terminal (all correctly) it would send the last character a few extra times... kind of like a car engine with run on. It was funny to watch... because it would eventually stop, but it slowed down first. Just like engine run on... first it sputters, then it dies after 1 or 2 last kicks.

I never did find the exact cause (at the time, I was getting tired of fixing everything else that had gone bad on the IMSAI), but it did correct it self after reseating the chips.

I am particularly interested in what type/make of sockets are on your board... I believe all of mine are "RW". Contacts are hidden, open frame type sockets.

Cheers,
Josh

From: rich...@verizon.net
Subject: Re: [N8VEM-S100:5726] Re: EPROM/RAM board
Date: Tue, 2 Dec 2014 10:51:50 -0500
To: n8vem...@googlegroups.com

Welcome back!

No. I don't think the right schematics and board plots are posted for that version.

Right now I'm building the Prop IO board. I can't get the 8088 board working with my vintage Solid State Music IO4 board (which works fine with the z80 board). I also can't seem to get the right jumpers for master mode.

Sent from my iPhone

On Dec 2, 2014, at 10:38 AM, John Monahan <mon...@vitasoft.org> wrote:

Rich, I’m back in CA . Did you get that RAM/ROM board version number straightened out?

John

From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of monahanz
Sent: Saturday, November 22, 2014 2:22 PM
To: n8vem...@googlegroups.com
Subject: [N8VEM-S100:5659] Re: EPROM/RAM board

The problem Rich is I'm in Paris currently and am working from memory. Will not be back in CA until Dec 1st but it sounds like you are correct. I will review the files when I get back.

John

On Friday, November 21, 2014 7:56:53 PM UTC-8, AltairManRich wrote:

All —

I was going to build the EPROM/RAM board this weekend but I noticed that there are several versions of the board. Mine says “4213” by the UL designation in the upper-left corner and has “Version 01” in the lower-right corner. It also has a coin cell battery holder on it.

This version doesn’t match any of the pictures on the Web site so before I built it, I wanted to confirm it was a good version. If not, I guess I should get another one from Ed Snider (I think).

Thanks!

Rich

--

Rich Cini

Collector of Classic Computers

Build Master and lead engineer, Altair32 Emulator

http://www.classiccmp.org/cini

http://www.classiccmp.org/altair32

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