- vcf-midatlantic - lists.vcfed.org

Hello Introduction
by W. Bryan Caudle 29 Jan '19

29 Jan '19

As a new member to the list, I am looking forward to meeting some other vintage computer enthusiasts and collectors and hopefully contribute to the conversation in the future. My whole work life has in some way involved technology, and my interest in computers goes back to elementary school with the TRS-80 model I and Apple II. I grew up with Commodore machines at home, followed by TRS-80's and PC Clones later on. I worked for Compuadd Corp in the 90's, then a local PC shop, then started my consulting business in 1994. Most recently my full time gig has been in infrastructure and architecture for a couple of global non-profit organizations. When I am not at work or spending time with family, my time is split between the computer collection and aviation. I have been intentionally collecting and restoring vintage hardware since 2006 with the future aspiration of having them on public display in some form either connected with an existing museum or starting something new. I am located in central Virginia, and we currently have around 100 machines in the collection, with the majority dating from the mid '70s through 90's, and cover a broad range of home computers, business computers, portables, and gaming consoles. I am happy to say that approximately 90% of them are functional. In addition to the usual suspects, some of our less common items include an IBM System/32, Basic Four Minicomputer, Acorn Electron, NeXT workstation, Xerox 1108 Lisp Machines, and the Commodore PC-10 IBM clone. I enjoyed my first visit to the VCF East last year and am looking forward to returning this year. I am considering participating in some sort of exhibition at the festival, either on my own or in cooperation with others and Evan suggested that I join this list to see where my ideas might fit in with what others are doing. Much of our collection is documented here if anyone is interested: http://www.vacomputermuseum.org<http://www.vacomputermuseum.org/> Thanks for your time!

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OT? Color Clock project idea
by Duane Craps 28 Jan '19

28 Jan '19

ALL, I've have a project idea that I probably won't ever get around to. It would be nice to have a clock that displayed the time as EIA color code colors (resistor color code) Four tri-color LEDs driven by PWM should be able to display the time with each digit being a color . Would be a good training aid to learn the resistor color It could even be one LED that sequenced through the colors. It is too far the project queue for me Active mind - lazy butt - DuaneCraps sdɐɹɔ ǝuɐnp

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Re: vcf-midatlantic Digest, Vol 8, Issue 26
by mwillega 28 Jan '19

28 Jan '19

I bought a Mac 128K when they first came out and used it extensively. However over the years, I had forgotten much of what that experience was about. A few years ago, I resurrected a MAC128K with the first version of the Mac OS and the associated apps. When I got it going, I was somewhat startled to notice how much it had in common with modern smart phone apps. You basically have one app at a time running and “owning” the platform. Now smart phones can transition between apps much easier that the early Macintosh ever could and there is much that they can do in the background, but there certainly is a bit more commonality going on, when dealing with the basic user interface, than one would expect to see after 30 years of user interface evolution. Regards, Mike Willegal > On Jan 28, 2019, at 12:00 PM, vcf-midatlantic-request(a)lists.vcfed.org wrote: > > Send vcf-midatlantic mailing list submissions to > vcf-midatlantic(a)lists.vcfed.org > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.vcfed.org/mailman/listinfo/vcf-midatlantic > or, via email, send a message with subject or body 'help' to > vcf-midatlantic-request(a)lists.vcfed.org > > You can reach the person managing the list at > vcf-midatlantic-owner(a)lists.vcfed.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of vcf-midatlantic digest..." > > > Today's Topics: > > 1. Museum Report 2019-01-27 (Jeffrey Brace) > 2. Macintosh HD 20 (Jason Perkins) > 3. Re: Macintosh HD 20 (Tony Bogan) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sun, 27 Jan 2019 17:00:23 -0500 > From: Jeffrey Brace <jeffrey(a)vcfed.org> > To: vcf-midatlantic <vcf-midatlantic(a)lists.vcfed.org> > Subject: [vcf-midatlantic] Museum Report 2019-01-27 > Message-ID: > <CALWfZAJPOS4RaXJ8TAic2v2kaGjvfRgaw2n+8RS3buBT+sE8qw(a)mail.gmail.com> > Content-Type: text/plain; charset="UTF-8" > > A busier than normal Sunday with three groups totaling about a dozen people > coming through with a moderate to high level of interest. They really liked > and appreciated the tours. Two groups were families with young kids. It's > always interesting to have the children guess what the different artifacts > are in the "Everything on this wall is now in your pocket" exhibit. I also > like to see if kids can figure out how to open up MacPaint on the Macintosh > and Paint on the Windows 3.1 machine. The basic functionality of the GUI > hasn't changed since the Macintosh, so it's fun to show how kids who have > never used the computer can still operate it due to user-friendly design. > > I also continued to work on VCF East planning and administration. > > -- > ========================================= > Jeff Brace > Vice President > Vintage Computer Federation > > > ------------------------------ > > Message: 2 > Date: Mon, 28 Jan 2019 11:42:38 -0500 > From: Jason Perkins <perkins.jason(a)gmail.com> > To: vcf-midatlantic <vcf-midatlantic(a)lists.vcfed.org> > Subject: [vcf-midatlantic] Macintosh HD 20 > Message-ID: > <CA+8Y7qLKP7YOLDAb+YBoS=PcCFgxky2LwaJ23hf3EU7DP1t5bQ(a)mail.gmail.com> > Content-Type: text/plain; charset="UTF-8" > > Does anyone know if the original Mac Hard Disk 20 - Model M0135 - ever > shipped with the Apple designed Nisha disk mechanism, or were they all > Rodime drives? > > Thanks! > > -- > Jason Perkins > > > ------------------------------ > > Message: 3 > Date: Mon, 28 Jan 2019 11:51:32 -0500 > From: Tony Bogan <thebogans(a)mac.com> > To: vcf-midatlantic <vcf-midatlantic(a)lists.vcfed.org> > Subject: Re: [vcf-midatlantic] Macintosh HD 20 > Message-ID: <032446A7-2F1B-4B06-A5D8-360C270E1A06(a)mac.com> > Content-Type: text/plain; charset=us-ascii > > I have had over a dozen, 4 still in my possession, all were the rodime drive. > Tony > > Sent from my iPhone > >> On Jan 28, 2019, at 11:42 AM, Jason Perkins via vcf-midatlantic <vcf-midatlantic(a)lists.vcfed.org> wrote: >> >> Does anyone know if the original Mac Hard Disk 20 - Model M0135 - ever >> shipped with the Apple designed Nisha disk mechanism, or were they all >> Rodime drives? >> >> Thanks! >> >> -- >> Jason Perkins > > > > End of vcf-midatlantic Digest, Vol 8, Issue 26 > **********************************************

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Macintosh HD 20
by Jason Perkins 28 Jan '19

28 Jan '19

Does anyone know if the original Mac Hard Disk 20 - Model M0135 - ever shipped with the Apple designed Nisha disk mechanism, or were they all Rodime drives? Thanks! -- Jason Perkins

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Museum Report 2019-01-27
by Jeffrey Brace 27 Jan '19

27 Jan '19

A busier than normal Sunday with three groups totaling about a dozen people coming through with a moderate to high level of interest. They really liked and appreciated the tours. Two groups were families with young kids. It's always interesting to have the children guess what the different artifacts are in the "Everything on this wall is now in your pocket" exhibit. I also like to see if kids can figure out how to open up MacPaint on the Macintosh and Paint on the Windows 3.1 machine. The basic functionality of the GUI hasn't changed since the Macintosh, so it's fun to show how kids who have never used the computer can still operate it due to user-friendly design. I also continued to work on VCF East planning and administration. -- ========================================= Jeff Brace Vice President Vintage Computer Federation

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Apple IIe Duodisk Disk Drive
by Michael Pohl 25 Jan '19

25 Jan '19

My son and I have an Apple IIe with a Duodisk 5.25 floppy drive. The floppy drive drive suddenly stopped loading programs but still lights up and make the same loud turning noise when a disk is inserted. I did some research and see that we can't load programs from drive B on the Duodisk, but that we can open it up and swap the B drive to the A location. Of course, that won't solve the problem if the problem is with the controller card or circuit board in the Duodisk. Any opinions on whether we should (a) assume there's a mechanical issue move froward with the swap or (b) do additional diagnostic work with the control card and Duodisk circuitry? If (b), what should we try? Thx, Mike Pohl

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SCSI device replacement using Raspberry Pi Zero
by Christopher Gioconda 25 Jan '19

25 Jan '19

Hey everyone, I came across this article about using a Raspberry Pi Zero to replace failing SCSI devices, thought it was an interesting idea: https://www.techrepublic.com/article/using-a-raspberry-pi-zero-scsi-adapter… Chris Gioconda

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White Ceramic 6502 for sale with questions
by Jeff G 25 Jan '19

25 Jan '19

Hi All, I have come to ask for some opinions bout a white 6502 processor that I have acquired. I has a date code 0f 4576 which I believe means the the 45th week of 1976. The problem is that it has 7 broken pins. I have no idea how that happened as this is how it came to me. It looks like it came from an Atari Sprint video game as it had "sprint" written on it in pencil which has been erased. You can still make out a faint outline of the pencil markings if you look closely. I installed it in a machined pin socket to protect the pins so I could attempt to test it with my 6502 tester. I used a CPU tester that a fellow name Molka from Hungary developed as it quickly establishes whether the CPU is dead or alive. Please see here < http://www.cpushack.com/mc680xmcs650x-test-boards-for-sale/> if you want more info. Anyway, by contacting the stubs of the missing pins to the machined pin socket, the device passes the tests so it is a functional unit. So here lies the dilemma, since I want to sell it, do I repair it or sell it as is? I have similar gold IC legs from other bad vintage chips so my repair would consist of leaving the chip in the machined pin socket and tack soldering spare gold legs on the stubs and touching up with gold plating solution if desired. So I guess the question is in preparation for sale, your opinions on whether to repair it or leave it as-is and let the buyer repair it? Here is a link to some pics of the CPU < https://1drv.ms/f/s!AoxC-mzikoIghU-LUkQUKebT0Vdm> BTW, I would like to keep the sale local/face to face as I know these are pretty rare and would hate to lose it in the mail. I am in Northern NJ. So if anyone is interested please let me know as I am accepting offers. I am reluctant to set a price because know how rare the are fully intact but don't know with the broken pins. Regards, Jeff

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Re: [vcf-midatlantic] Happy owner fo a Tandy MC-10
by Neil Cherry 23 Jan '19

23 Jan '19

On 1/19/19 9:06 AM, Duane Craps via vcf-midatlantic wrote: I haven't gotten the MC-10 yet (won the bid last night). Before I start buying parts for it I'll check that it works. I found some documentation on the MC-10. I already have the 68xx asm books. Really need to find that Moto 6808 CoCo board. I think that's what the MC-10 is abased on. 6800 family, binary compatible 6800 - microprocessor 6802 - 128B of RAM, (microprocessor) 6808 - No ROM, No RAM (microprocessor) 6801 - ROM, RAM, IO (microcontroller) 6803 - RAM, IO, No ROM (microcontroller) 6809 - different microprocessor, mnemonic super set (not binary compatible) I haven't checked the circuit but it might be possible to feed it 9v AC as long as you have the correct current rating (I think it's 1.5A). The DC is okay for now as long as you don't need the RS232 and the cassette (ouch). I have found the various French Alice and Alice 90 stuff. Not sure how compatible it is but it's based on the MC-10. I'm sure there is something interesting there. I have a CoCo 1/2/3, a few Grant Searle's FPGA emulation boards, I'll let you know how that goes. I also have my Sardis ST2900 which I should be working on as I know they need a few chips and then documenting how we used to get them from ROM monitor to full OS9. BTW, love the 6809. :-) -- Linux Home Automation Neil Cherry ncherry(a)linuxha.com http://www.linuxha.com/ Main site http://linuxha.blogspot.com/ My HA Blog Author of: Linux Smart Homes For Dummies

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mYSTERY KEYBOARD
by Neil Cherry 23 Jan '19

23 Jan '19

I have a mystery keyboard from around 1985. I know the following: - Keytronics model unknown - CPU (?) markings 30293-e 20-04592-054 GI 8215 CDA 19-4148-01 REV 1 PCB 01 A65-02395 -201A Images: https://ushomeautomation.com/images/mystery-kb-back.jpg https://ushomeautomation.com/images/mystery-kb-front.jpg What I haven't done so far is to power it up. And I'm not sure if the EPROM is actually original to the keyboard. -- Linux Home Automation Neil Cherry ncherry(a)linuxha.com http://www.linuxha.com/ Main site http://linuxha.blogspot.com/ My HA Blog Author of: Linux Smart Homes For Dummies

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