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OT: Test
by Jeffrey Brace 09 Oct '17

09 Oct '17

Where is my message?

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Festivus 2017 Dec. 9 & 10 - Signup
by Jeffrey Brace 08 Oct '17

08 Oct '17

Signup here: https://docs.google.com/spreadsheets/d/1odmPxfBK9BrR-NDZIx4_c-V2lZpt_-vU-3f…

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Re: [vcf-midatlantic] vax scsi questions
by VAXman＠tmesis.org 08 Oct '17

08 Oct '17

william degnan via vcf-midatlantic writes: >> >> Some MicroVAXes in the 3100 series came with two SCSI busses. There >> are designated A and B. The SCSI id for the MicroVAX controller was >> typically 7; so devices could be attached with ids from 0 to 6. The >> naming of the devices, when VMS is booted are: >> >> ddcn: when dd is the name of the driver controlling the device. If >> the device is disk, this is DK (DKDRIVER). If the device is a tape, >> it's MK (MKDRIVER). The 'c' in the device designation if the adapter >> upon which the device is located. If there are two adapters, this is >> either A or B. The 'n' is the device number. Unless you're looking >> as a dvices served from a storage controller, the sub-LUN vallues are >> 0. So on your MicroVAX, you see somehting like a DKA300: for a disk >> addressed as SCSI id 3 on the A adapter. >> >> If you need more info, ask. > >This applies exactly, thanks. >Bill I should take this time to mention that there's also a GKDRIVER (generic SCSI); albeit, you'll need to connect that driver manually to the appro- priate SCSI id. I used to use a large HP bed scanner; it was SCSI based. Via the GKDRIVER, there was software that would allow me to scan pictures, documents, and whatever else I might place upon the scanner bed.

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FS: Two Processor Tech 4KRA 4K Static RAM S-100 Boards Tested/Working
by systems_glitch 08 Oct '17

08 Oct '17

Board #1: http://www.ebay.com/itm/272879702807 Board #2: http://www.ebay.com/itm/272879706168 I'm guessing both of these boards were used in the previous owner's Altair 8800 until they had RAM failures, and were likely replaced with something newer and less power-hungry. These are one of Processor Tech's earlier S-100 boards, and they use 32x low-power (for the time!) 2102 static RAMs. Both boards have been repaired and fully tested in my IMSAI 8080 with a 2 MHz 8080 CPU board. The first one is fully socketed and had five dead SRAMs. The second is not socketed and had one dead SRAM, which was replaced with a machine pin socket. The second one used soldered jumpers for address selection, so I switched it over to machine pin sockets for easy re-addressing. I'd suggest that these boards not be purchased by someone wanting a static RAM board for general debugging -- they're low-density, I don't believe they support the *PHANTOM line, 2102s aren't the world's most reliable SRAM, etc. They'd go nicely with an original Altair 8800 (especially if you have a CUTS system!) or SOL-20. Thanks, Jonathan

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FS: Processor Tech VDM-1 Video Board Tested/Working
by systems_glitch 08 Oct '17

08 Oct '17

link: http://www.ebay.com/itm/272879570374 This board had some trace damage in the address jumper area, which was repaired by installing machine pin sockets in all of the address jumper positions. One position had the through-hole completely pulled out, with no pads on either side -- the trace to this pin was repaired, and the pin secured in place with two-part epoxy. After repair to the address jumper area, it was found that the DM8131 address decoder was bad, this was replaced with a NOS part. As shown in the listing, this board is now 100% functional and tests out according to the Processor Tech manual. It was tested in my IMSAI 8080 with an Intel 8080 CPU board. Do note that this is an older design and requires I/O addresses to be mirrored (high byte should be the same as low byte). This is standard for 8080/8085 CPU boards, but other CPU boards (e.g. Z80) may not support it, or may require a jumper change. Thanks, Jonathan

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Re: [vcf-midatlantic] vax scsi questions
by VAXman＠tmesis.org 08 Oct '17

08 Oct '17

Jim Scheef via vcf-midatlantic writes: >Bill, Are the two SCSI port two separate bus or two ports on the same >bus (controller)? If there is only one bus, terminate the empty >connector. If there are two bus, turn off the empty bus. This is >standard SCSI. Duplicate SCSI ID's are a no-no and must be fixed. All >devices on the bus must has a unique ID. Hope this is what you asked. >Jim Which MicroVAX 3100 model? In general, each device on a SCSI bus must have a unique SCSI address. If, for example, two drives are address as SCSI id 3, you'll find you will have issues with both or corrupt one or both drives. Typically, the MicroVAX startup firmware will probe the SCSI bus and complain if there are SCSI id conflicts. Some MicroVAXes in the 3100 series came with two SCSI busses. There are designated A and B. The SCSI id for the MicroVAX controller was typically 7; so devices could be attached with ids from 0 to 6. The naming of the devices, when VMS is booted are: ddcn: when dd is the name of the driver controlling the device. If the device is disk, this is DK (DKDRIVER). If the device is a tape, it's MK (MKDRIVER). The 'c' in the device designation if the adapter upon which the device is located. If there are two adapters, this is either A or B. The 'n' is the device number. Unless you're looking as a dvices served from a storage controller, the sub-LUN vallues are 0. So on your MicroVAX, you see somehting like a DKA300: for a disk addressed as SCSI id 3 on the A adapter. If you need more info, ask.

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VAX stuff available
by william degnan 08 Oct '17

08 Oct '17

I have the following items available from a recent purchase. I got them from Fran down in Baltimore (I think he's on our list, in addition to CCTALK). I got more than I needed assuming others will want some of it. I will sell for same price as paid-for (tens of dollars), just to pass along to someone who might want them, at my cost.. VAX 4000-60 (I got two, keeping one) VAX 3100 (not microvax, has diskette drive, interesting) I also already had a few other items related to DEC VAX/Alpha/Rainbow that I don't need that you can pick through here. Ideally looking for someone to pop over to Landenberg and pick up. If you're looking to get into VAX/VMS cheap now is your chance. If there are no takers now I will bring what's left to Festivus in December. Contact me through vintagecomputer.net Trades excepted. Pickup only or wait until Festivus. Here is what I have, VAX-wise Alpha 2100 DEC 3000 Microvax 3100 * VAX 4000-200 * VAX 4000-60 (have two one avail) VAX 3100 Rainbow 100s and parts. (have three two avail) Cables VT 220's. (more terminals than keyboards) other terminals. VT100 (with no keyboard, needs flyback repair) * not available, what I am keeping Bill

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Collection downsizing
by Jonathan Gevaryahu 07 Oct '17

07 Oct '17

I very badly need to downsize the collection of computers and computer ephemera I have, and would appreciate any advice on the best way to go about doing so. The collection has grown over the past 15 years to far larger than I am able to handle at the current time. I do not have a complete inventory of the current collection, but it is a mixture of complete machines and spare parts. Is there some place I could drop off machines, 'free to a good home' or offer stuff 'free for the price of shipping/handling'? -- Jonathan Gevaryahu jgevaryahu(a)gmail.com jgevaryahu(a)hotmail.com

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vax scsi questions
by william degnan 07 Oct '17

07 Oct '17

working through from VAX 3100 / microvax SCSI drives. Three questions / looking for confirmation 1) true/false - it does not matter which scsi connector port you use, as long as the last drive's unconnected port has a terminator 2) true/false - drives have their names (DKB500, DKB300, etc) and they travel with the drive even if removed 3) true/false - show dev shows all drives attached to the computer that are properly terminated. 4) If question 2 is true and there are two drives with the same name, how does the VAX handle this? ignore the 2nd of same name? Thanks Bill

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Wanted: Dead ST-506
by Jason Perkins 07 Oct '17

07 Oct '17

Does anyone have a dead or otherwise very unhealthy ST-506 or ST-412 they'd want to get rid of for small / reasonable $$? I want to research replacing the bearing(s) in one of my Apple Profiles, and need a drive to experiment on. One with very noisy bearings and a snapped off head would be perfect! I do have a PC ST-506 mechanism that I think is working, but I've never tried it. The bearing sounds fine spinning it by hand. I lost the board that attaches to the bottom, but I don't want to destroy a possibly working drive. Thanks! -- Jason Perkins 313 355 0085

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