- vcf-midatlantic - lists.vcfed.org

Vic-20 Switch
by Jeffrey Brace 10 Feb '20

10 Feb '20

The museum's vic-20 power on switch is difficult to turn on and off. Is this a common issue with the vic-20? Is there a way to make it easier to turn on and off like the C64 power switch? -- ========================================= Jeff Brace Vice President & Board Member, VCF East Showrunner Vintage Computer Federation http://www.vcfed.org/ jeffrey(a)vcfed.org

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Online ticket sales for VCFe 2020 have begun!
by Dean Notarnicola 10 Feb '20

10 Feb '20

Online ticket sales have begun, exclusively on Eventbrite https://www.eventbrite.com/e/vintage-computer-festival-east-2020-tickets-92… Advance ticket purchase on Evenbrite gets you in 30 minutes early (8:30 am) so you can claim a spot for keynotes, classes, sales or other events. Ticket prices are higher at the door the days of the event and do not start unitl 9:00 am, so buy ahead and get in early! *Advance ticket sales close at end of day Monday April 20th, so don't wait!*

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Last workshop report
by David Gesswein 10 Feb '20

10 Feb '20

Executive summary: I checked out the two 3B1's in the museum. One had hardware mods to allow more and larger disks and is functional though the drive doesn't want to reliably spin up. The second has a motherboard fault. I also updated the image on the 3B1 in the Museum and added a USB cable hidden behind the center expansion board cover to allow easier updates to the disk image. Due to the rain and the filler work running long the Xerox 8010 didn't get that much work done. It appears to have a hardware fault though was running some. Fault may just be with the control panel. The hard drive wouldn't spin properly, likely loose belt. The second Xerox was not investigated at all. TLDR: The plan was to mostly work on the Xerox 8010 Star/Dandelion but we decided to not try to move it in the heavy rains Saturday so I did more 3B1 work. I checked out the two 3B1's in the warehouse and removed the batteries from both. The first one with sticker NCR SN 02233914 on the side was interesting. The motherboard had been modifed to the P5.1 motherboard configuration. This change was under development when AT&T killed the UNIX PC line. The last software supported it but the updated motherboard was not shipped. P5.1 increases the number of heads supported from 8 to 16. The hard disk controller chip was also changed to the WD2010 which allows the number of cylinders to be increased from 1024. The chip supports 2048 but the operating system limit is 1400. It also had the modification to support a second hard drive. You can see the grill for one of the fans had been cut down to allow the cables for the second drive to exit the case for an external drive at some point. The fan was reinstalled and no cables are present for the external drive. Currently it is configured with a single DEC RD54 hard drive. The drive capacity is 152 MB vs the standard configuration of 67 MB. I removed the RD54 to backup with my reader. It initially didn't want to spin up but with some light hits to spin it around the spindle axes it spun up and I was able to read the drive. The MSB for the head was put in the sector number byte since the WD2010 only supports 8 heads. I hadn't run across a machine with the P5.1 mods so had to fix my 3B1 decoding to match. The drive label had 42 defects listed. I found 7 sectors with read errors, the first 5 matching sectors in the defect list. The machine has 2 MB on the motherboard and a 2 MB memory expansion board so has the maximum amount of memory supported. It also has a floppy tape drive expansion board and cable with it. I forgot to dig around on the shelf rack to see if the drive was around. May be good to see if the drive is around so it can be kept together with the computer. This machine had the battery holder installed. I removed the BR2325 battery. You likely can install a BR2330 to get a little longer life. BR2330 is the battery I have in the museum 3B1. After I put everything back together the computer was running but the hard drive wasn't spinning up. Likely the drive is unhappy. I didn't open it back up to check that I got the power plug fully seated. I also did not test the floppy drive. This machine is more tricked out than the one in the museum except for not having the DOS expansion board. I haven't looked that much at the disk image. It does have some things I haven't seem before, a CAD program and an office suite Smart Software System with wordprocessor, database, spreadsheet, and spellchecker. It had noticable usage by one user and a couple other accounts. A few pictures here http://www.pdp8online.com/3b1/vcf-p5.1/pics.shtml The second 3B1 is labeled 370429065 on the bottom. I was able to read the drive but it had 50 bad sectors and got worse with further read attempts. The drive didn't sound too bad. It's possible that the drive is useable with a reformat. The system files were similar to the previous machine and it only had one user account with no significant content so I didn't try harder to recover the bad sectors. This machine does not complete its power on diagnostics. It has one green LED lit which indicates that the video ram failed its test. I did not try to fix the fault. This machine still had the soldered in battery so I cut it out. It was a CR2430. It has a dual serial port expansion board installed without memory installed so only has the 2 MB on the motherboard. I opened the museum 3B1 and ran a USB cable from the emulator with the end tucked above the center expansion slot memory board. It can be accessed by removing the center slot cover. It is a USB-C connector. I updated the image with some more demo software. Some of the additions are it has BASIC, Logo, gcc, Microsoft Word & Multiplan, simple hello world in C, BASIC, and Logo, a ~10 line Logo program which draws a tree and the software to use the DOS coprocessor board. I need to write up a description of how to use the stuff installed. I demoed at the workday. Connor was working on a VAX which didn't want to boot. We used my mfm board to verify that the RD54 drive wasn't going ready. Comparing to the 3B1 RD54 it sounded like the heads were stuck. He opened the drive and it had a deteriorating rubber stop for the heads that was likely preventing them from moving. It was a blue rubber ring on the bottom plate of the drive and reasonably accessible. He removed as much of it as he could and the heads properly went through the startup sequence. I tried to read the drive with my mfm board and it had an excessive number of read errors to be useful. I did verify it was a VMS disk. It appears to have the problem commonly seen where the head stack is out of alignment. Some of the heads are so far out of alignment you read the data from the next cylinder. Drive may be recoverable with methods like this. http://www.pdp8online.com/mfm/head_servo/ Connor pulled 2 more RD54's from warehouse machines to try to get a good image for the emulator in case we can't get one formatted by the VAX. One drive wouldn't work, I think stuck heads again. The other was readable. It was from a PDP-11, possibly a 73. It is RT-11 with KASTLE SYSTEMS building monitoring software. Only a few hours were left when I got to the Xerox 8010. I pulled the boards and power to the hard drive and verified the power supply voltages were within specification. I also inspected for anything suspicious. For some reason the floppy drive power and data cables were disconnected. I released the spindle and head shipping locks on the hard drive and verified the spindle would turn. I hooked up my mfm board and tried to read the drive. The drive barely spun. I think the belt is slipping. I didn't have time to remove the drive from the machine to work on further. We installed the cards and powered on the machine after Connor found the power button hiding behind a cover. As previously reported the diagnostic display counted from 0 to 10 repeatedly. If I understand the documentation, the machine is supposed to cycle through these codes when the alt boot button is pressed and you release it when the code matches the operation you wish to perform. I played with the button but it still always went though the 0-10 sequence. It is reading the button as always depressed. The reset button next to it did function. The hard drive power is currently disabled and the shipping locks installed. The floppy power and data cables were reconnected. The machine is missing its castors. They need to be replaced. It still needs cleaning. The one I was working on one of the side panels is broken at the bootom. I think the other machine had a good side panel. Their is some rust but the machine looks in reasonable condition. I did not do any testing on the second machine.

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Museum Report 2020-02-09 February 9, 2020
by Jeffrey Brace 10 Feb '20

10 Feb '20

I started setting up The PrintShop with the C64 in the 80's bedroom exhibit. Found the original box and disks. Going to have a Star Gemini NX-10 working to print out samples for visitors. A decent amount of visitors. I started training a new docent named Dennis and hope to have him up to speed and in the rotation soon. I started out by hazing him and made him figure out how to turn all the 2 dozen different machines which can be tricky as they are in different spots, some have switches, some are power buttons, etc. -- ========================================= Jeff Brace Vice President & Board Member, VCF East Showrunner Vintage Computer Federation http://www.vcfed.org/ jeffrey(a)vcfed.org

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Museum Report 2020-02-08 February 8, 2020
by Jeffrey Brace 10 Feb '20

10 Feb '20

About two dozen people came through the museum with medium interest. It is interesting to show off all the improvements to the museum. Tony and Adam were there all day working on various museum and warehouse stuff. Things are really looking great in the museum. Come stop by and see what all the cool new stuff that is happening! -- ========================================= Jeff Brace Vice President & Board Member, VCF East Showrunner Vintage Computer Federation http://www.vcfed.org/ jeffrey(a)vcfed.org

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Re: [vcf-midatlantic] Working on a historical microprocessor exhibt
by Adam Michlin 09 Feb '20

09 Feb '20

LOL. Well, MIPS was just an ivory tower academic design... <duck and cover> (for the record for everyone, I heart MIPS and I teach MIPS... ) On 2/9/2020 1:27 PM, Andrew Diller wrote: > My outrageous claim: I think a whole exhibit dedicated to just MIPS evolution... it's a fascinating arch and one that counts as a classic 90's UNIX powerhouse. > > But of course, that is just my opinion.... > > > Bare Min should include: MIPS R3k, R4k, R5k, R10k, R12k, R14k and the R16k. > > There is a good case to be made that MIPS pushed the boundaries of RISC evolution in the 90's and if it weren't for the Itanium disaster would be a strong contender nowadays... > > -andy > >> On Feb 9, 2020, at 11:45 AM, Adam Michlin via vcf-midatlantic <vcf-midatlantic(a)lists.vcfed.org> wrote: >> >> Hi Everyone, >> >> VCF is working on a historical exhibit of CPUs (not really support chips at this point). Literally just the CPUs. >> >> What should we have at the bare minimum? 4004, 8008, 8088, 8086, 6502, Z80, 6800, 6809...? >

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Macworld EXPO NY 2000
by Peter Fletcher 09 Feb '20

09 Feb '20

In July of 2000, my friend Joe and I attended Macworld NY. We saw the introduction of the G4 Cube, iMovie 2, and OS X. On stage we saw Steve Jobs, Gregory Hines, and Douglas Adams and we had the privilege to meet Sinbad on the show floor. Sadly Steve, Gregory, and Douglas have all since passed away. Sinbad thankfully is still alive and well. I stumbled upon my old Canon Mini DV camera in February of 2020 and this footage was on one of the tapes. It just seemed right to use iMovie 2 to import and edit the video. My old Power Mac G4 was also used to import and edit. Video here : https://youtu.be/SVKUgkT8wuA <https://youtu.be/SVKUgkT8wuA> -Pete

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Re: [vcf-midatlantic] Working on a historical microprocessor exhibt
by Dave McGuire 09 Feb '20

09 Feb '20

On 2/9/20 2:20 PM, Andrew Diller wrote: >> <voice accent="irish"> >> A man after me own heart! >> </voice> >> > > I read that as > > > <voice accent="Spongebob-Pirate-Narrator"> > A man after me own heart! > </voice> coffee -> keyboard -- Dave McGuire, AK4HZ New Kensington, PA

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Re: vcf-midatlantic Digest, Vol 21, Issue 9
by Burning Image 09 Feb '20

09 Feb '20

I would suggest adding the 1802, 2650, 6100 / 6120. and SC/MP. Best regards, Cory Sickles On Sunday, February 9, 2020, 12:01:37 PM EST, <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. Working on a historical microprocessor exhibt (Adam Michlin) ---------------------------------------------------------------------- Message: 1 Date: Sun, 9 Feb 2020 11:45:37 -0500 From: Adam Michlin <amichlin(a)swerlin.com> To: vcf-midatlantic <vcf-midatlantic(a)lists.vcfed.org> Subject: [vcf-midatlantic] Working on a historical microprocessor exhibt Message-ID: <e873e0db-612f-2e6f-dde3-cbd43002ae54(a)swerlin.com> Content-Type: text/plain; charset=utf-8; format=flowed Hi Everyone, VCF is working on a historical exhibit of CPUs (not really support chips at this point). Literally just the CPUs. What should we have at the bare minimum? 4004, 8008, 8088, 8086, 6502, Z80, 6800, 6809...? What should we have if we have more space? 80x86, 680x0, Sparc, MIPS, Power, Alpha, ARM, Itanium...? Modern CPUs (to some degree) aren't out of the question, either, as we're hoping to show the progression of Moore's Law from the 4004 (2,300 transistors) to present day maybe, for example, a AMD Ryzen 9 3900X (at 9,890,000,000 transistors). Thoughts? I'm sure I'm forgetting plenty of important CPUs. ?????????? -Adam End of vcf-midatlantic Digest, Vol 21, Issue 9 **********************************************

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ISA BIOS extension board?
by Richard Cini 08 Feb '20

08 Feb '20

All – I have an old 486 “shoe box”/industrial PC from 1994 that I want to toss a larger hard drive in to use with some Windows 3.11 experiments I’m doing. Unfortunately, it doesn’t have LBA BIOS extensions, so I’m capped at 540MB. I have one from WD, but it’s kind of creaky. So, I pulled out a 1.2G drive I had and installed OnTrack 9.57 which works fine. However, I feel kind of funny relying on the software wedge because you need to make custom boot diskettes, etc. So, I was looking for an ISA card with the LBA BIOS extensions. I know they made them years ago, but I don’t know exactly what they are called, so I’m not having much success in locating one. There may be other options like using an XT-IDE (if it does LBA; can’t tell) or maybe a different IDE card. Problem is that space is very limited (only 3 slots) and it has to be a low/short card to avoid interfering with the CPU fan. Any other suggestions/advice welcome. Right now I’m going to run with the 540MB drive I have, but I would like to find a better solution. Thanks! Rich -- Rich Cini http://www.classiccmp.org/cini http://www.classiccmp.org/altair32

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