- vcf-midatlantic - lists.vcfed.org

Museum move - getting closer...
by Evan Koblentz 28 Jan '16

28 Jan '16

Everyone, Here's an update on the status of moving our museum. - We signed the new lease a couple of weeks ago. We will pay a (symbolic) $1/year for five years, and then we have five one-year renewals at the same price. - InfoAge received an estimate for turning one of the new room's single doors into a double door. A second estimate is forthcoming. Having a double door will allow us to more easily bring in larger stuff including the pallet-ized UNIVAC. - Fred and I are meeting soon to sort out the keys. - IA leadership includes someone who is an architecture and art professor. We've been asked to show him our layout plan for feedback and hopefully will do so this weekend. - We purchased a small amount of a new kind of shelving. We're going to assemble a single unit this weekend (will only take 15 minutes). If it works as expected, then we'll make the large purchase based on our recent fundraiser. - Depending on how busy we all are at the workshop this weekend, I may ask for two or three helpers to start taking apart our old museum. For example we can start by boxing up all the books and putting them into the warehouse. (We recently purchased a bunch of file boxes.) - We are delaying the addition of more electrical circuits into the new room until we see the final costs of the door, furniture, etc.

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FS: OSI 525 Dual Port Static RAM Board
by Systems Glitch 28 Jan '16

28 Jan '16

link: http://www.ebay.com/itm/272118422825 I received this board with another Ohio Scientific board. There are zero components populated, not even the Molex connectors. Sockets are present for the 2114 static RAMs and some of the board logic. Super clean board otherwise. I'm not sure what else it's used for, but the 525 board was used in Ohio Scientific's 14" hard drive subsystem -- I know as I've got one. It can of course be used as standard system RAM, and it's probably cheaper to find a bunch of 2114 static RAMs than a bunch of working SEMI4200s for a OSI 520 board. This one's up as an auction as I have no real idea what it's worth. I don't need it for any of my OSI stuff, but I figured someone else can use it, and with the scarcity of OSI boards, I shouldn't hold on to it. Thanks, Jonathan

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OT: Anyone have LexisNexis access?
by Evan Koblentz 28 Jan '16

28 Jan '16

I need to get an article that I wrote in 2012. It's fairly urgent. Contact me privately. Thanks

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Trenton - Sat., 3/19
by Evan Koblentz 28 Jan '16

28 Jan '16

Everyone, We will have a small presence at Trenton this year. (Last year's big presence was an exception for their 40th anniversary, as was our large display two years ago when we didn't have a VCF East that year.) This year, we'll just have one table, one to-be-determined computer on display, and a bunch of fliers. Nice and simple... I am giving a talk on "The present and future of computer history". Abstract - The field of computer history has seen many exciting changes in the past few years. Collectible prices are rising, new people are bring new ideas into our field, and a non-profit organization is emerging to help with structuring things. Come learn and go back to the future with us! Delorean not required. I'll need one helper that day (to hold down our fort while I'm lecturing and so I can make a round of the other club tables and stuff.)

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OT: Test
by tom.hornberger＠verizon.net 28 Jan '16

28 Jan '16

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FS: MITS 88-PMC 1702A EPROM Board
by Systems Glitch 27 Jan '16

27 Jan '16

link: http://www.ebay.com/itm/272117827487 Tested, working, very clean except for a lifted topside /QB pad between ICs P and T, which doesn't affect operation since the trace connects on the bottom side. I don't know why the original builder chose such a large ceramic capacitor below the -8V regulator...let me know if you'd like it replaced. This is a REV 1 board with solder mask and a DIP switch for address selection, as opposed to the wire jumper address selection on REV 0 boards. I tested this one with several EPROMs on my IMSAI 8080. It generates wait states properly. It is currently addressed for 0xF800 - 0xFFFF. Thanks, Jonathan

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Interesting OP-AMP Boards
by Systems Glitch 27 Jan '16

27 Jan '16

All, These came in a lot of other plugboard/protoboard bits I picked up: http://imgur.com/a/XUFAJ One has two 741 OP-AMPs, the other two have a single LM311. I'm guessing from the array of hollow pins that they're meant to be wired up with some sort of banana-plug-like jumper system. I'm not sure what they're from. Some sort of analog computer or control system, perhaps? Any ideas? They're single-sided, but everything on the back side is gold plated. Thanks, Jonathan

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Mystery ROM from MITS 88-PMC ROM Board
by Systems Glitch 27 Jan '16

27 Jan '16

I've been going through a lot of my S-100 boards, doing cleaning and testing. Tonight I started on a MITS 88-PMC, which had a ROM in the last socket (locations 0xFF00 - 0xFFFF) with no label. It's not the MBL, DBL, or TURMON. Here's a hex dump from the Dajen SCI monitor: http://pastebin.com/24Gjh2kw It starts with LXI SP, 0xFF13 -- a ROM location. I've seen the trick used elsewhere, to reduce code size by using an in-ROM jump table. Anyone recognize the code? Thanks, Jonathan

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test ... this might our DNS change to the new hoster...
by Evan Koblentz 27 Jan '16

27 Jan '16

I had a message bounce just now, so our DNS change may be underway....

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DNS changes
by Evan Koblentz 27 Jan '16

27 Jan '16

Hopefully this message will get through at some point. :) I logged into the domain zone editor for our new hoster and made the necessary A/MX/TXT entries. That should make this list "just work" when the DNS changes over from GoDaddy to the new company. I'm not sure if that is happening right now (Erik told us it would be soon) or if there's just a hiccup of some sort. Regardless, it would be good and worthwhile when it's done!

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